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FLM Engineer Handbook - 1 - FLM Engineer Handbook Nokia Siemens Networks Circle : Maharashtra & Goa Cluster : Location : FLM Engineer : Mobile No : CTL : Mobile No. :

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IT WILL HELP TO O&M ENGINEERS TO MAINTAIN NETWORK

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  • FLM Engineer Handbook

    - 1 -

    FLM Engineer Handbook

    Nokia Siemens Networks

    Circle : Maharashtra & Goa

    Cluster : Location :

    FLM Engineer : Mobile No : CTL : Mobile No. :

  • FLM Engineer Handbook

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  • FLM Engineer Handbook

    - 3 -

    INDEX

    Sl.No Topics Page No.

    1. Introduction 5 2. Key Performance Index (KPI) 5 3. Basic Trouble Shooting Tips. 9

    i. NSN Ultra BTS ... 10 ii. NSN Metro BTS. 18

    iii. NSN Flexi BTS.. 22 iv. NSN Flexi Hopper. 29 v. BSC 3i Frequently used Commands 32

    vi. Ceragon SDH Radio. 33 vii. NEC SDH Radio 34

    viii. Tejas Mux 37 ix. ECI Mux.......... 42

    4. Log in Cable Pin Configuration 48 5. BTS External Alarm Details... 51 6. Fault Severity Definition. 52 7. Outage Restoration Priority.. 52 8. Site Acceptance Process 53 9. PT 4 Process.. 55 10. Fleet Management Process .. 56 11. OHS Process and Safety Tips.. 57 12. Spare Management Overview.. 59 13. Test and Measurement Equipment Handling Tips. 665 14. Standard Templates and Checklist 76

    i. Preventive Maintenance Checklist ii. Pre-monsoon Checklist

    iii. Daily Activity Record iv. Site Asset Database v. Acceptance Testing Checklist

    15. Site Details. 77 16. Network Diagram and PCM Plan. 79

  • FLM Engineer Handbook

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  • FLM Engineer Handbook

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    Introduction

    This handbook is intended to serve the purpose of reference to engineers in his location and will be a ready reckoner for locating his site, network details and contains basis trouble shooting tips for NEs in his location area, log-in cable pin configuration, various process overview and escalation matrix.

    Also this handbook contains various operational checklists which need to be updated as per schedule mentioned in the JFLM Service Level Agreement (SLA).

    The handbook will be handed over to all field engineers in a circle on his joining and needs to be handed over to CTL or new engineer on his leaving the organization, location, cluster or circle.

    Key Performance Index The Key Performance Index (KPI) tells the general condition of the network. All networks have many operational parameters but among them few are considered as key parameters and whose value states the health of the network. Minimum and Maximum level are determined by the communication service provider (CSP) as per the contract with their strategic partner. These KPIs parameters are in terms of accessibility and retain-ability for network or cell-wise and measured either during network busy hours (NBH) or bouncing busy hour (BBH).Network Busy Hour (NBH) is that particular hour in a day (24 Hours) during which total switch network has maximum ulitization or the switching network is busy. Commonly it is between 1900 Hrs to 2000 Hrs but may vary in week days and also circle wise. Bouncing Busy Hour (BBH) is that particular hour in a day during which the cell is having maximum utilization or the radio resource remains busy. This varies according to cell location, week days and does not have any fixed hour as it can be between 1000 Hrs to 1100 Hrs in cells located at commercial areas, 2000 to 2100 hrs in cells located in residential areas CSP often differentiates their network geographically into Top 10/Top 100/Showcase and Rest of Network/Non Showcase. The values for KPI parameters have different weight age based on the type of network. KPI Parameters are defined separately for Voice, Data, Customer Satisfaction Index (CSI) & Intelligent Network (IN). Mentioned below are KPIs of a telecom network. Some critical KPI parameters are marked in red

  • FLM Engineer Handbook

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    KPIs Voice Network Availability Network Availability Switch (During 24 Hrs) Network Availability Radio (During 24 Hrs) Network Capacity Switch Network Utilization (During Switch NBH) Peak Processor Load (During 24 Hrs) Radio Network Utilization (During BBH) Cells Having Utilization >= 90% (During BBH) Network Accessibility Core Network Accessibility Successful Call Rate (24 Hrs) Paging Success Rate (NBH) Radio Network Accessibility(NBH) Random Access Success Rate SDCCH Blocking SDCCH Drop TCH Blocking (User Perceived) TCH Assignment Success Rate Cell Wise Accessibility(BBH) Random Access Success Rate >95% SDCCH Blocking

  • FLM Engineer Handbook

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    The most important KPI for an FLM engineer is Radio Network Availability (RNA) and has to ensure maximum radio network uptime. Also he has to ensure that all installed hardwares are fault free, does not have any hardware related alarms, cables and connectors are tight as per desired level and VSWR, transmit power are within desired level. This will definitely have a bearing in reducing SD and TCH blocking.

    Let us understand the meaning of few critical KPIs, their desired values for a good network.

    Network Availability Switch (During 24 Hrs) It is measured as the ratio of total switch uptime to total time in minutes for every 24 hours. Typical Value: 100% Network Availability Radio (During 24 Hrs) It is measured as the ratio of total radio network uptime to total time in minutes for every 24 hours. Typical Value: 99.95% (For Top 10/Top 100/Showcase Networks) 99.90% (For Rest of Network/Non Showcase Networks) These values are after commercial exclusions. Successful Call Rate (24 Hrs)

    It is measured as the ratio of no of successful calls to total no. of calls attempted in a network. Typical Value: 95%

    SDCCH Blocking It is defined as the no of blocked standalone dedicated control channel or radio signaling

    channel in a network. It is measured as the ratio of total blocked SD channel to total available SD channel. Network wide SD blocking is normally analyzed in terms of radio network accessibility during network busy hour (NBH). Cell wise radio network accessibility due to SD blocking is also analyzed during bouncing busy hour (BBH) to ascertain that percentage of cells having SD blocking less than defined benchmark say 0.5%.

    Typical Value of SDCCH Blocking network wise (NBH):

  • FLM Engineer Handbook

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    drop is also analyzed during bouncing busy hour (BBH) to ascertain that percentage of cells having TCH drop less than defined benchmark say 2.75%.

    Typical Value of TCH Drop network wise (NBH): 91% during cell BBH.

    Typical Value of HOSR network wise (NBH): >95% Typical Value of HOSR > 91% cell wise (BBH) : >90%

    TCH Assignment Success Rate (TASR) It is a successful TCH seizure for call Set up. MS is moved from signalling ( SDCCH) to TCH after successful assignment. TASR during NBH can be calculated as a ratio of total successful assignment to total assignment request by MS. Cellwise TASR is calculated with percentage of cells meeting benchmark say >95% during cell BBH.

    Typical Value of TASR network wise (NBH): >97% Typical Value of TASR> 95% cell wise (BBH) : >90%

  • FLM Engineer Handbook

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    Basic Trouble Shooting Tips Troubleshooting with the help of alarm tables Purpose The fault reason can be used for troubleshooting. The faults and instructions on how to correct the faults are presented in table format (see example of alarm table below): Steps 1 Check the alarm number and alarm name and refer to Alarms list for UltraSite, MetroSite, Flexi

    EDGE BTS to find the correct alarm description table. 2 Find the fault reason in the Fault reason field in the alarm description table. 3 Follow the instructions in the proposed order given in the Instruction field. See also alarm cancelling information in the Cancelling field. 4 If the fault reason cannot be found in the Fault reason field, follow the instructions given for Other faults. 5 If there is no fault reason text with the alarm, refer to the correct alarm description table and follow the possible instructions given in the Instruction field.

    Severity Object affected Object state Unit Shows the alarm severity as displayed at the BSC or NMS/NetAct. The options are: * = minor ** = major *** = critical User definition

    The logical object affected by the fault.

    The state of the affected object at the time the alarm is issued. The options are: Enabled Disabled

    The alarm origin(s). The unit

    is given an acronym.

    Fault reason Instruction Alarm cancelling

    This field describes the cause of the alarm.

    This field gives instructions for the operator (at the NMS/NetAct or at the BSC) how to correct the fault reason causing the alarm.

    This field describes how the alarm is cancelled. The options are: Automatic Manual

  • FLM Engineer Handbook

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    Alarms for UltraSite BTS 7600 BCF FAULTY

    Severity Object affected Object state Unit

    *** BCF Disabled BB2x, BOI, DVxx, PWSx, RTxx, TSxx, MHA

    Fault reason Instruction Alarm cancelling Oven oscillator is broken. 1. Replace the BOI. Automatic

    Base station synchronisation failed.

    1. Check that the synchronisation source is up and alive. Automatic 2. Check that the transmission settings are OK. 3. Check the synchronisation cabling. 4. If the cabling is OK, replace the BOI.

    Other faults.

    1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7603 BTS FAULTY and follow the instructions given for the active alarm(s)

    Automatic

    7601 BCF OPERATION DEGRADED Severity Object affected Object state Unit

    ** BCF Enabled BB2x, BOI, DVxx, MHA, PWSx, RTxx, SISU, TSxx

    Fault reason Instruction Alarm cancelling Power unit output voltage fault.

    1. Replace all faulty power units. Automatic

    Power unit input voltage fault. 1. Ensure that the input voltage is correct. Automatic 2. Replace all faulty power units. Automatic

    No connection to power unit. 1. Replace all faulty power units. Automatic

    Power unit temperature is dangerously high.

    1. Ensure that the ambient temperature of the base station is within specified limits.

    Automatic 2. Check the cabinet fans. 3. Replace the faulty power unit(s).

    Transmission unit temperature is dangerously high.

    1. Ensure that the ambient temperature of the base station is within specified limits.

    Automatic 2. Check the cabinet fans. 3. Replace the faulty transmission unit.

    Difference between PCM and base station frequency reference.

    1. Check the network synchronisation between the BSC and the base station.

    Automatic 2. Check the transmission synchronisation settings on the transmission card. 3. Check the transmission cabling at the site. 4. Replace the BOI.

    Rx levels differ too much between main and diversity antennas.

    1. Check the RSSI measurements by BTS Manager. Note: From BTS Manager, open the RSSI Comparison Values dialog box or Site Information dialog box to pinpoint the alarming RSSI value and antenna.

    Automatic 2. Check and measure the antenna lines. 3. Check the BTS RF cables and connections. 4. Replace the combiner unit. Check that the RXDL parameter at the BSC is set to a reasonable value,taking into account the site conditions to prevent unnecessary alarms. 5. Replace the TSxx unit.

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    Fault reason Instruction Alarm cancelling

    Other faults

    1. Check whether one or several of the following alarms are active: 7606 TRX FAULTY 7603 BTS FAULTY 7607 TRX OPERATION DEGRADED 7604 BTS OPERATION DEGRADED 7602 BCF NOTIFICATION and follow the instructions given for the active alarm(s).

    Automatic

    7602 BCF NOTIFICATION Severity Object affected Object state Unit

    * BCF Enabled

    BB2x, BOI, Cabinet, Cabinet fan, DVxx, HETx,PWSx, RTxx, SISU, TRE,TSxx, Unit fan

    Fault reason Instruction Alarm cancelling

    Power unit temperature is low.

    1. Ensure that the ambient temperature of the base station is within specified limits.

    Automatic 2. Check that the heater is working properly if equipped. 3. Replace the PWSx.

    Transmission unit temperature is low.

    1. Ensure that the ambient temperature of the base station is within specified limits.

    Automatic 2. Check that the heater is working properly if equipped. 3. Replace the transmission unit.

    Power unit has lost connection to temperature sensor.

    1. If another slot in the cabinet is empty, move the power unit into the empty slot.

    Automatic 2. The temperature sensor is probably broken. Temperature changes cannot be measured. Replace the power unit.

    Transmission unit has lost connection to temperature sensor.

    1. Temperature sensor is probably broken. Temperature changes cannot be measured. Automatic Replace the transmission unit.

    BOI detected that connection totransmission unit is lost.

    1. Open the Nokia UltraSite BTS Hub Manager and check the active alarms. If this base station or other base stations beyond it otherwise operate properly, there is no need for an immediate repair. However, the transmission alarms for the faulty unit are not reported to the BSC or the Nokia BTS Manager. Automatic 2. Reset the faulty transmission unit. 3. If the alarm reappears after the transmission unit reset, switch the cabinet power off and on. If the alarm reappears after the recovery actions above, replace the faulty transmission plug-in unit.

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    Fault reason Instruction Alarm cancelling Cooling fan is broken.

    1. Check which fan is giving the alarm from the upplementary information (rack/shelf/slot).

    Automatic

    2. If something has jammed the cooling fan unit, remove the jamming object. 3. If the TSxx fan is alarming:

    . Replace the TSxx in front of the fan. If the fan starts working, the removed TSxx is broken.

    . If the fan still does not rotate after the first TSxx was replaced, reinsert the original TRX and replace the second TSxx in front of the same fan unit. If the fan starts rotating, the second TSxx is broken.

    . If the fan does not work after the TSxx removal test, the fan is broken and must be replaced.

    4. For other fan alarms, replace the corresponding fan unit. 5. Otherwise, replace the BOI. Note: This alarm is related to fans located in the back of the cabinet.

    Cabinet fan is broken.

    1. Check that the fan cable is connected to the door switch box.

    Automatic 2. If something has jammed the cabinet fan unit, remove the jamming object. Otherwise, replace the fan unit.

    3. Replace the door switch box. 4. Otherwise, replace the BOI. Note: This alarm is related to door fan (Outdoor BTS only).

    Cooling fan speed has reduced from the set speed.

    1. If the fan is dirty, clean the fan unit.

    Automatic 2. If something has jammed the cooling fan unit, remove the jamming object. Otherwise, replace the fan unit. Note: This alarm is related to fans located in the back of the cabinet.

    Cabinet fan speed has reduced from the set speed.

    1. If the fan is dirty, clean the fan unit.

    Automatic

    2. If something has jammed the cabinet fan unit, remove the jamming object. Otherwise, replace the fan unit. Note: This alarm is related to door fan.

    Power unit output voltage fault.

    1. Replace the faulty power unit. The cabinet has more than one power supply unit. The other power units are still functioning.

    Automatic

    Power unit input voltage fault.

    1. Ensure that the input voltage is correct. Automatic 2. Replace the faulty power unit. The cabinet has more than one power supply unit. The other power units are still functioning.

    Automatic

    Common rack PWS I2C bus is jammed.

    1. Give a one-minute power reset to the whole BTS cabinet.

    Automatic 2. Check the power unit(s) and power backplane connectors, and replace if faulty.

    Common rack EAC I2C bus is jammed.

    1. Give a one-minute power reset to the whole BTS cabinet.

    Automatic 2. Reset the BCF. 3. If the cabling between the BOI and the Interface board on the top side of the cabinet is OK, replace the Interface board.

  • FLM Engineer Handbook

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    Fault reason Instruction Alarm cancelling

    No connection to power unit.

    1. Check if the power unit is switched off.

    Automatic 2. If the power unit is on, replace the faulty power unit. The cabinet has more than one power supply unit. The other power units are still functioning.

    Mismatch between BSC/MMI configuration file and the actual configuration.

    1. Check that all units are installed and working OK.

    Automatic 2. Check that the actual base station configuration, HW configuration file and BSC configuration match. Make necessary corrections.

    BSS synchronization failed. 1. Check the clock cabling between the external clock source and the BCF. Automatic

    Incompatible unit presence detected in the BTS

    1. Ensure that the ratio TRXs:PSUs in the cabinet is less than or equal to 6:1. Note that a ratio TRXs:PSUs greater than 6:1 in the cabinet is not recommended; it may result in alarms on the Power Supply Units, TRXs or duplexers, or other spurious alarms,and it may result in the site going into an unstable state.

    Automatic

    7603 BTS FAULTY Severity Object affected Object state Unit

    *** BTS Disabled BB2x, DVxx, RTxx, TSxx, MHA

    Fault reason Instruction Alarm cancelling

    Other faults.

    1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7607 TRX OPERATION DEGRADED and follow the instructions given for the active alarm(s).

    Automatic

    7604 BTS OPERATION DEGRADED Severity Object affected Object state Unit

    ** BTS Enabled BB2x, BOI, DVxx, MHA, RTxx, TSxx

    Fault reason Instruction Alarm cancelling

    Rx levels differ too much between main and diversity antennas.

    1. Check the RSSI measurements by BTS Manager. Note: From BTS Manager, open the RSSI Comparison Values dialog box or Site Information dialog box to pinpoint the alarming RSSI value and antenna. From CX5 CD1.0 onwards the history of last active RSSI alarms will provide the information of which antenna line was detected faulty. Note: There is a hysteresis of 2 dB in the cancellation of the alarm. The alarm is cancelled when the RSSI measurement result is less than RXDL -2 dB.

    Automatic

    2. Check and measure the antenna lines. 3. Check the BTS RF cables and connections. 4. Replace the combiner unit. Check that the RXDL parameter at the BSC is set to a reasonable value,taking into account the site conditions to prevent unnecessary alarms. Replace the TSxx unit.

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    Fault reason Instruction Alarm cancelling

    Other faults.

    1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7607 TRX OPERATION DEGRADED and follow the instructions given for the active alarm(s).

    Automatic

    7606 TRX FAULTY Severity Object affected Object state Unit

    ** TRX Disabled BB2x, DVxx, RTxx, TSxx, MHA

    Fault reason Instruction Alarm cancelling

    Antenna connection faulty.

    1. Check the TSxx TX cable. Replace if faulty and reset TRX to cancel the alarm.

    Manual 2.If the TX cable is OK, the TSxx is faulty. Replace the TSxx.

    Fault in VSWR antenna monitoring.

    1. Check the antenna line and Bias-T cabling.

    Manual (sector

    lock/unlock).

    2. Reset the sector. 3. Check all RF cabling between the TSxx's TX output connector and top of the cabinet (including WCDx and DVxx or RTxx units). 4. Replace the Bias-T. 5. Replace TSxx.

    Failure detected during TRX configuring.

    1. Check whether the TSxx/DVxx/RTxx frequency is compatible with the BSC network parameters.

    Automatic. 2. Reset the TRX/sector. 3. Replace the TSxx.

    BOI detected that connection to TRX is lost.

    1. Check the BTS configuration and install the BB2x if it is missing.

    Automatic. 2. Replace the BB2x. Reset the TRX/sector. Note: This alarm refers to the connection between BOIA and BB2x. Do not replace TSxx in this case.

    Failure in 26 MHz clock input. 1. If all TRXs indicate this fault, replace the BOI.

    Automatic. 2. If only one TRX indicates this fault, replace the BB2x. Interface problems between O&M and DSP SW.

    1. Reset the TRX/sector. Manual. 2. If the fault reappears, replace the BB2x.

    1st branch LNA in dual variable gain duplex unit is faulty.

    1. Replace the DVxx. Automatic.

    2nd branch LNA in dual variable gain duplex unit is faulty.

    1. Replace the DVxx. Automatic.

    BB2x temperature is dangerously high.

    1. Ensure that the ambient temperature of the base station is within specified limits. Automatic.

    2. Check the cabinet fans. Automatic. 3. Replace the BB2x. Automatic.

    TSxx temperature is dangerously high.

    1. Ensure that the ambient temperature of the base station is within specified limits.

    Automatic. 2. If air filters are used, check that they are not clogged. 3. If outdoor cabinet is used, check the door fan. 4. Check the cabinet fans. 5. Replace the TSxx.

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    Fault reason: Instruction: Alarm cancelling: There is disturbance in the serial DL bus or bus is broken.

    1. Reset the TRX/sector.

    Automatic

    2. Check that the BB2x-TSxx HW configuration is valid. 3. Reset the BCF. 4. Swap the unit with another working (non-alarming) TSxx unit in the cabinet. 5. If the new TSxx raises the same alarm, check the backplane connectors. If alarms follow the original TSxx, replace the unit.

    Non EDGE TRX device used accidentally in EDGE capable mode.

    1. Check the IDD configuration (TSxx unit type) from the HW Configurator.

    Automatic 2. Ensure that the unit types of the IDD TSxx units are correct (EDGE-capable unit, TSxB).

    TRX is stuck in waiting for system information state.

    1. Reset the TRX/sector. Note: Do not replace the TSxx unit. Automatic

    FBUS HW failure. 1. Reset the sector. Automatic 2. Replace the BB2x units one by one.

    The transmitter output of TRX is overdriven.

    1. Replace the TSxx. Automatic

    The transmitter output power has dropped at least 3 dB.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    The transmitter output power is too low.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    Fault in RF module transmitter interface.

    1. Replace the TSxx. Automatic

    Fault in RF module receiver interface.

    1. Replace the TSxx. Automatic

    RF module initialization has failed.

    1. Replace the TSxx. Automatic

    The RF transmitter synthesizer is not locked.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    The RF transmitter frequency hopping synthesizer 1 is not locked.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    The RF transmitter frequency hopping synthesizer 2 is not locked.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    The RF receiver synthesizer is not locked

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    The RF receiver frequency hopping synthesizer 1 is not locked.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    The RF receiver frequency hopping synthesizer 2 is not locked.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    7607 TRX OPERATION DEGRADED Severity Object affected Object state Unit

    ** TRX Enabled BB2x, DVxx, MHA, RTxx, TSxx

    Fault reason Instruction Alarm cancelling 1st branch LNA in dual variable gain duplex unit is faulty.

    1. Replace the DVxx. 2nd branch is still working and calls are getting through. Automatic

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    Fault reason Instruction Alarm cancelling 2nd branch LNA in dual variable gain duplex unit is faulty.

    1. Replace the DVxx. 1st branch is still working and calls are getting through. Automatic

    Performance is degraded in the 1st branch dual variable gain unit.

    1. Replace the DVxx. 2nd branch is still working and calls are getting through. Automatic

    Performance is degraded in the 2nd branch dual variable gain unit.

    1. Replace the DVxx. 1st branch is still working and calls are getting through. Automatic

    No connection to dual variable gain duplex unit.

    1. Check the BTS configuration and install the DVxx if it is missing from the configuration.

    Automatic 2. Check the cable connection between the backplane and the DVxx unit.

    3. Replace the DVxx. The transmitter output power has dropped at least 3 dB.

    1. Reset the TRX/sector. Automatic 2. Replace the TSxx.

    7608 TRX NOTIFICATION Severity Object affected Object state Unit

    * TRX Enabled BB2x, BOI, DVxx, RTxx, TSxx

    Fault reason Instruction Alarm cancelling TSxx internal I2C bus is jammed.

    1. Reset the TRX. Automatic 2. If the fault reappears, replace the TSxx.

    BB2x has lost connection to temperature sensor.

    1. Reset the TRX/sector.

    Automatic 2. Temperature sensor is probably broken. Temperature changes cannot be measured. Replace the BB2x.

    TSxx has lost connection to temperature sensor.

    1. Reset the TRX/sector.

    Automatic 2. Temperature sensor is probably broken. Temperature changes cannot be measured. Replace the TSxx

    7609 TRE FAULTY Severity Object affected Object state Unit

    *** BCF Disabled TRE Fault reason Instruction Alarm cancelling

    BOI detected that connection to transmission unit is lost.

    1. If the base station otherwise operates properly, there is no need for an immediate repair. However, the transmission alarms for the node are not reported to the BSC or the Nokia BTS Manager.

    Automatic 2. Reset BCF. 3. If the alarm reappears after the BCF reset, switch the cabinet power off and on. 4. If the alarm reappears after the recovery actions above, replace the faulty transmission plug-in unit located in slot 1.

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    7616 OSCILLATOR ADJUSTMENT TEMPORARILY INTERRUPTED Severity Object affected Object state Unit

    * BCF Enabled BOI Fault reason Instruction Alarm cancelling

    Oven oscillator adjustment function interrupted.

    1. Check that the Abis synchronisation is correct. NOTE: The alarm is an indication that the BTS DAC control value is less than 204 steps away from either control range end limit (0 or 4095). The adjusting of the BTS clock still continues. The alarm is automatically canceled when the control value is more than 204 steps away from the control range end limits.

    Automatic

    7622 CABINET OPEN Severity Object affected Object state Unit

    * BCF Enabled BOI Fault reason Instruction Alarm cancelling

    Cabinet door is open. 1. Ensure the cabinet door is properly closed and secured.

    Automatic 2. Check that the door switch is fitted properly in the cabinet and that all related cabling is OK.

    7801 MMI CONNECTED TO BASE STATION Severity Object affected Object state: Unit

    * BCF Enabled BOI Fault reason Instruction Alarm cancelling

    Nokia BTS Manager is connected to Nokia UltraSite EDGE BaseStation. (No Fault)

    1. No actions required.

    Alarm is cancelledautomatically when theBTS Manager connection isdisconnected.

    Mentioned above are few of the most common alarm which is visible in NSN system. For complete details of all alarms, refer to NED.

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    Alarms for MetroSite Edge BTS 7208 LOCAL BLOCK

    Severity Object affected Object state Unit

    * BCF, or BTS, or TRX Disabled VTxx, HVxx, WTxx, CTxx Fault reason Instruction Alarm cancelling

    No fault reason text with the alarm. MetroSite EDGE BTS object is blocked with BTS Manager.

    1. No actions required. Automatic

    7600 BCF FAULTY Severity Object affected Object state Unit

    *** BCF Disabled VTxx, HVxx, WTxx, CTxx, VSxx, HVSx, CVSx, VIFA

    Fault reason Instruction Alarm cancelling Base station synchronisation failed.

    1. Check the synchronisation cabling. Automatic 2. If the cabling is OK, replace the master TRX (TRX-1).

    3. Reset the BCF.

    Power unit is probably broken.

    1. If the power supply unit LED is green, check the TRXs and replace the faulty TRX. TRX connectors are probably broken. Automatic 2. If the power supply unit LED is red, replace the power supply unit.

    Oven oscillator is broken. 1. Replace the VIFA unit. Automatic

    Temperature inside the TRX is dangerously high.

    1. Check whether the following alarm is active: 7621 INTOLERABLE CONDITIONS ON SITE and follow the instructions given for the alarm.

    Automatic 2. Even if alarm 7621 is not active, and there is only one TRX in the cabinet, follow the instructions given for alarm 7621. 3. If alarm 7621 is not active and the cabinet has more than one TRX, replace the master TRX.

    Other faults.

    1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7603 BTS FAULTY and follow the instructions given for the active alarm(s).

    7601 BCF OPERATION DEGRADED Severity Object affected Object state Unit

    ** BCF Enabled VTxx, HVxx, WTxx, CTxx Fault reason Instruction Alarm cancelling

    Cabinet I2 C bus is jammed.

    1. Switch the site power Off and On.

    Automatic 2. Check the fan unit, the power supply unit and the TRXs. If necessary, replace the faulty unit(s). 3. If the fault reappears, replace the cabinet. The units inside the cabinet can be reused in the new cabinet.

    Difference between PCM and base station frequency reference.

    1. Check the cabling. Automatic

    2. If the cabling is OK, replace the master TRX.

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    Fault reason Instruction Alarm cancelling

    Incompatible unit presence has been detected in the BTS.

    1. Replace the high power or EDGE TRX(s) with normal type TRX(s) and reset the BCF.

    Automatic 2. Or, replace the normal type FAN and power supply with high power or EDGE units. Now EDGE and high power TRXs are supported.

    Rx levels differ too much between main and diversity antennas.

    1. Check the RSSI measurements with BTS Manager.

    Automatic

    2. Check and measure the antenna lines. 3. Check the BTS RF cables and connections. 4. Check that the RXDL parameter at the BSC is set to a reasonable value, taking into account the site conditions in order to prevent unnecessary alarms. 5. Replace the TRX unit.

    Other faults.

    1. Check whether one or several of the following alarms are active: 7606 TRX FAULTY 7603 BTS FAULTY 7607 TRX OPERATION DEGRADED 7604 BTS OPERATION DEGRADED and follow the instructions given for the active alarm(s).

    Automatic

    7601 BCF OPERATION DEGRADED Severity Object affected Object state Unit

    * BCF Enabled VTxx, HVxx, WTxx, CTxx,VMFA, HVMF Fault reason Instruction Alarm cancelling

    Temperature inside the TRX is high.

    1. Check whether the following alarm is active for fan unit: 7605 BTS NOTIFICATION and follow the instructions given for the alarm.

    Automatic

    2. Even if there are no active alarms for the fan unit,check that no foreign objects obstruct the airflow. 3. If alarm 7605 is not active, ensure that the ambient temperature of the base station is within acceptable limits.

    Fan unit is broken.

    1. Check whether the fan unit is installed. 2. When there is a fan unit installed, check if something has jammed the fan unit and remove the jamming object. Otherwise replace the fan unit.

    Other faults. 1. Check whether the following alarm is active: 7606 TRX FAULTY and follow the instructions given for the alarm.

    Automatic

    7604 BTS OPERATION DEGRADED Severity Object affected Object state Unit

    ** BTS Enabled VTxx, HVxx, WTxx, CTxx Fault reason Instruction Alarm cancelling

    Rx levels differ too much between main and diversity antennas.

    1. Check the RSSI measurements with BTS Manager.

    Automatic

    2. Check and measure the antenna lines. 3. Check the BTS RF cables and connections. 4. Check that the RXDL parameter at the BSC is set to a reasonable value, taking into account the site conditions in order to prevent unnecessary alarms. 5. Replace the TRX unit. Automatic

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    Fault reason Instruction Alarm cancelling

    Other faults.

    1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7607 TRX OPERATION DEGRADED and follow the instructions given for the active alarm(s).

    Automatic

    7605 BTS NOTIFICATION Severity Object affected Object state Unit

    * BTS Enabled VMFA, HVMF Fault reason Instruction Alarm cancelling

    Fan unit operation degraded.

    1. If something has jammed the fan unit, remove the jamming object. Otherwise replace the fan unit. Automatic.

    7606 TRX FAULTY Severity Object affected Object state Unit

    ** TRX Disabled VTxx, HVxx, WTxx,CTxx Fault reason Instruction Alarm cancelling

    Failure detected during TRX configuring.

    1. The TRX is either faulty or its frequency band is different from the one that was configured into BSC. Replace the TRX with a functional TRX or with another TRX with correct frequency band. Automatic 2. There is an incompatible TRX power type in baseband hopping sector. A mixture of High and Low Power TRXs is used in a BB hopping enabled sector. Replace the incompatible TRX power type.

    Non EDGE TRX device type used accidentally in Edge Capable Mode.

    1.Replace the Non-EDGE TRX with an EDGE TRX (STIRC sector enabled).

    Automatic

    Antenna connection faulty.

    1. Check the antenna and RX cabling. If the antenna and RX cabling are faulty, correct the problem and run TRX test to cancel the alarm.

    Manual (TRX lock/unlock)

    2. If RX diversity is in use, check that the diversity RX cabling and/or termination is done properly. 3. If the antenna and RX cabling are OK, the TRX is faulty. Replace the faulty TRX. Note: An alarm reports only if the PMAX value is 0 or 2 (two highest power levels).

    Other faults. 1. Replace the TRX. Automatic. 7607 TRX OPERATION DEGRADED

    Severity Object affected Object state Unit

    ** TRX Enabled VTxx, HVxx, WTxx,CTxx Fault reason Instruction Alarm cancelling

    Antenna connection faulty.

    1. Check the antenna and RX cabling. If the antenna and RX cabling are faulty, correct the problem and run TRX test to cancel the alarm.

    Manual (TRX lock/unlock).

    2. If RX diversity is in use, check that the diversity RX cabling and/or termination is done properly. 3. If the antenna and RX cabling are OK, the TRX is faulty. Replace the faulty TRX. Note: An alarm reports only if the PMAX value is 0 or 2 (two highest power levels).

    Other faults. 1. Replace the TRX. 1. Replace the TRX.

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    7609 TRE FAULTY Severity Object affected Object state Unit

    *** BCF Disabled VXxx Fault reason Instruction Alarm cancelling

    Master TRX detected that connection to transmission unit is lost.

    1. If the alarm is seen at the BSC, the transmission unit is not working properly. However, if the base station otherwise operates properly, there is no need for immediate repair. The transmission alarms are not reported to the BSC.

    Manual/Automatic 2. If the alarm is seen on BTS Manager only, the transmission unit is not operating. Reset the BCF. 3. If the alarm reappears after BCF reset, switch the cabinet power off and on.

    4. If the alarm reappears after the recovery actions above, replace the faulty transmission plug-in unit.

    7616 OSCILLATOR ADJUSTMENT TEMPORARILY INTERRUPTED Severity Object affected Object state Unit

    * BCF Enabled VIFA Fault reason Instruction Alarm cancelling

    Oven oscillator adjustment function interrupted.

    1. Check the Abis connection. Automatic.

    2. If the Abis connection is OK, replace the faulty VIFA unit.

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    Alarms for Flexi Edge BTS 7208 LOCAL BLOCK

    Severity Object affected Object state Unit Minor BCF, BTS, or TRX Disabled

    Fault reason Instruction

    Field not used. An object (TRX, Sector or BCF) is locally blocked by a BTS Manager command.No repair actions required, alarm is cancelled when object is locally deblocked by BTS Manager.

    7600 BCF FAULTY Severity Object affected Object state Unit Critical BCF Disabled ESEA, ESMA

    Fault reason Instruction

    Air i/f reference clock 26 MHz not available.

    Air i/f reference clock 26 MHz not available. ESMA System module detected that its Oven Controlled 26 MHz Oscillator is not generating the frequency reference.. 1. If 7600 - BCF FAULTY "ESMA System module temperature dangerously high" is also active, follow the fault instructions to resolve. 2. Issue HW Reset to ESMA from Remote BTS Manager. 1. Make sure that ambient temperature of the site is within normal operating temperature range (-35 +50C/-31+122F). 2. Issue a HW Reset to ESMA from (remote) BTS Manager. Note: This site's bypass transmission will be cut for 1-2 minutes. 3. Replace ESMA.

    BSS synchronisation failed.

    ESMA System module detected no synchronisation signal at synchronisation input (SIN) port at startup. 1. Check that the BCF synchronisation related settings are correct at the BSC via MML command(s) (ZEFO...). 2.If another BTS is the synchronisation master, check if that it is up and alive. 3. Check that the synchronisation cabling is correctly mated between the units Replace ESMA.

    ESEA System Extension module reported HW failure.

    ESMA System module detected that a hardware failure has occurred in the ESEA System Extension module. 1. Issue HW reset to ESEA from BTS Manager. 2. If fault persists, replace ESEA and reset the BCF.

    ESMA System module has lost connection to ESEA System Extension module.

    ESEA System Extension module does not respond to polling command from ESMA System module. 1. Check the power distribution to ESEA. 2. Check that the bus cable is correctly mated between ESMA and ESEA. 3. Replace ESEA. 4. Replace ESMA.

    ESMA System module temperature dangerously high.

    Internal temperature of ESMA System module has exceeded +95C/+203F. 1. Ensure that the ambient temperature of the base station is below +50C/+122F. 2. Check if any fan alarms are also active. If active, refer to fan alarm instructions to resolve. 3. Replace ESMA.

    Mismatch between the commissioned configuration and actual configuration.

    1. SCF contains ESEA, but it is not detected in the actual configuration. 2. SCF does not contain ESEA, but it was detected to port 6 of ESMA 3. If cabling source is 'AUTODETECTED' in the SCF, do BCF reset with RFCAD.

    4.a) Modify the SCF to match the actual configuration. OR 4.b) Modify the actual configuration to match the SCF. 5. Replace ESEA.

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    7601 BCF OPERATION DEGRADED Severity Object affected Object state Unit

    Major BCF Enabled ESEA, ESMA Fault reason Instruction

    All external Q1 devices fail to respond.

    None of the configured Q1 devices in the Q1 bus are responding to a polling command. 1. Check that Q1 addresses and baud rate match between the Q1 devices and BSC. 2. If FIFA is used and BTS is polling Q1 equipment, check that Q1 switch towards the Q1 bus is closed with FlexiHub Manager. 3. Check that the Q1 cables are correctly mated between the ESMA and Q1 devices. 4. Replace ESMA.

    Commissioning failed due to BCF ID mismatch between commissioning file and BSC

    Incorrect BCF ID between the BSC and the Commissioning File (SCF). 1. Check the transmission path of the traffic allocated to the site against the network plan. 2. Using the BTS Manager, recommission the BTS with correct BCF ID. (Steps on the BTS Manager: Commissioning Wizard | Change Settings Manually --> Amend the BCF ID, as needed) Note: The alarm is sent only when the BTS is uncommissioned and a mismatch has been detected. In any other cases, for example, after a BCF reset, the alarm is not sent. If in Append commissioning, the mismatch of BCF id is visible only in the commissioning report.

    Difference between PCM and BTS frequency reference.

    There is over 5 Hz difference to the 2MHz reference clock due to Abis link instability. 1. Check that Synchronisation priority list has correct Rx clock sources. 2. Check the Abis link quality (G.826 performance statistics via BTS Manager/NetAct). Check the alarm history for 8xxx alarms reported and resolve any link problems occurred. 3. Check the network synchonisation between the BSC and the base station. 4. If alarm is active at multiple sites, check the quality of synchronisation for the whole BSS.

    ESEA System Extension Module fan(s) out of order.

    ESEA System Extension module detected reduced speed or no rotation of fan(s) against commanded speed. 1. Check that the fan unit cable is correctly mated to ESEA. 2. Check that there are no obstacles preventing the fan(s) from rotating. 3. Clean the fan unit of dust and/or dirt. 4. Replace the fan unit. 5. Replace ESEA.

    ESMA System module cooling fan(s) report no rotation.

    One or more fans of the ESMA System module are not rotating. There is a danger of overheating. 1. Check that the fan unit cable is correctly mated to ESMA. 2. Check that there are no obstacles preventing the fan(s) from rotating. 3. Clean the fan unit of dust and/or dirt. 4. Replace the fan unit. 5. Replace ESMA.

    ESMA System module has detected no fans.

    ESMA System module has not detected a fan unit at start up. There is a danger of overheating. 1. Check that the fan unit cable is correctly mated to ESMA. 2. Replace the fan unit. 3. Replace the ESMA.

    ESMA System module has lost connection to FSEx External Alarm (EAC) module

    FSEx External Alarm (EAC) module does not respond to poll message of the ESMA System module.

    1. Check that FSEx is set to Active Mode by connecting pins 3-4 of X1103 jumper.

    2. Check that the cabling is correctly mated between ESMA and FSEx. 3. Replace FSEx. 4. Replace ESMA.

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    Fault reason Instruction

    Module power cable connections are incorrectly configured.

    One or more of the internal power cable connections does not match power cabling rules. Intelligent shutdown feature may not operate correctly. 1. Check the internal power and bus cabling against the product documentation set. 2. Issue a BCF reset.

    7602 BCF NOTIFICATION Severity Object affected Object state Unit

    Minor BCF Enabled ECxA, EOCA, ESEA, ESMA, Exxx

    Fault reason: Instruction:

    BSS synchronisation failed.

    ESMA System module has lost synchronisation signal at synchronisation input (SIN) port. 1.If another BTS is the synchronisation master, check if that it is up and alive. 2. Replace ESMA.

    ESEA System Extension module connected to wrong port.

    ESEA System Extension module is not connected to port 6 of ESMA System Module. 1. Connect ESEA to port 6 of ESMA, and issue a BCF reset.

    ESEA System Extension module temperature high.

    Internal temperature of ESEA System Extension module has exceeded +85C/+185F. 1. Ensure that the ambient temperature of the base station is below +50C/+122F. 2. Check if fan alarm is also active. If active, refer to fan alarm instructions to resolve. 3. Replace ESEA.

    ESMA System module cooling fan speed has reduced from the set speed.

    The cooling fan speed has reduced substantially from the commanded fan speed. 1. Check that nothing obstructs the fan(s) from rotating. 2. Clean the fan unit of dust and/or dirt. 3. Replace the fan unit. 4. Replace ESMA.

    ESMA System module temperature high.

    ESMA System module has detected that its internal temperature has exceeded +90C/+194F. 1. Ensure that the ambient temperature of the base station is below +50C/+122F. 2. Check if any fan alarms are also active. If active, refer to fan alarm instructions to resolve. 3. Replace the ESMA.

    EXxx TRX module connected to wrong port.

    EXxx TRX Module is not connected to ESEA System Extension module. 1. Connect EXxx module to ESEA.

    7603 BTS FAULTY Severity Object affected Object state Unit

    Critical BTS Disabled DDU, ECxx, Erxx Fault reason Instruction

    Other faults. 1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7607 TRX OPERATION DEGRADED and follow the instructions given for the active alarm(s).

    7604 BTS OPERATION DEGRADED Severity Object affected Object state Unit

    Major BTS Disabled DDU, ECxx, Erxx Fault reason Instruction

    Other faults. 1. Check whether either of the following alarms is active: 7606 TRX FAULTY 7607 TRX OPERATION DEGRADED and follow the instructions given for the active alarm(s).

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    7605 BTS NOTIFICATION Severity Object affected Object state Unit

    Minor BTS Enabled ECxA Fault reason Instruction

    ERxx DDU module connected to wrong EXxx TRX module.

    There is a conflict in the antenna cabling (RF source unit) between the SCF and the actual configuration. 1. Check that the antenna cabling information in the SIR (found under "Cabling information" section) refers to the correct and existing ERxx.

    ERxx DDU module has detected no Tx power at TxA input.

    1. Run TRX test for all TRX objects connected to the TxA input. 2. Check the whole Tx cabling chain between EXxx, EWxx (if used) and ERxx modules. 3. Check that the RF cables are not damaged or bent too sharply. 4. Replace ERxx. 5. Replace EXxx.

    ERxx DDU module has detected no Tx power at TxB input.

    There is no Tx power detected at TxB input of ERxx DDU module. 1. Run TRX test for all TRX objects connected to the TxB input. 2. Check the whole Tx cabling chain between EXxx, EWxx (if used) and ERxx modules. 3. Check that the RF cables are not damaged or bent too sharply. 4. Replace ERxx. 5. Replace EXxx.

    ERxx DDU module reported HW failure.

    At startup ERxx DDU module reported internal HW failure. 1. Replace ERxx.

    ESMA System module has lost connection to EXxx TRX module.

    EXxx TRX module does not respond to polling command from ESMA System module. EXxx TRX module can be connected to ESMA either directly or via ESEA System Extension module.

    If the alarm is suddenly seen on many or all TRX objects on a site where ESEA System Extension module is used, it indicates a hardware failure in the ESEA. 1.Issue ESMA HW reset 2. Toggle PDU port from BTS Manager. 3. Check the bus cable chain from EXxx TRX module to ESMA/ESEA. 4. If the EXxx TRX module LED is off, replace the power cable. 5. Replace EXxx. 6. Replace ESEA if alarming TRX is connected to it. 7. Replace ESMA.

    EXxx TRX module has lost connection to ERxx DDU module

    ERxx DDU module is not responding to poll command from EXxx TRX module. 1. Check that the ERxx cable is correctly mated between EXxx and ERxx. 2. Replace ERxx. 3. Replace EXxx.

    EXxx TRX module Rx fixed frequency synthesizer fails to lock.

    Rx fixed frequency synthesizer in EXxx TRX module was unable to (maintain) lock to the given channel. 1. Reset TRX/Sector. 2. Replace EXxx.

    EXxx TRX module Rx hopping synthesizer 1 fails to lock.

    Rx hopping synthesizer 1 in EXxx TRX module was unable to (maintain) lock to the given channel. 1. Issue a TRX lock/unlock. 2. Issue DTRX HW reset from BTS Manager. 3. Toggle PDU port 4. Replace EXxx.

    EXxx TRX module Rx hopping synthesizer 2 fails to lock.

    Rx hopping synthesizer 2 in EXxx TRX module was unable to (maintain) lock to the given channel. 1. Issue a TRX lock/unlock. 2. Issue DTRX HW reset from BTS Manager. 3. Toggle PDU port 4. Replace EXxx.

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    EXxx TRX module temperature dangerously high.

    EXxx TRX module has detected that its internal temperature has exceeded +95C/+203F. 1. Ensure that the ambient temperature of the base station is below +50C/+122F 2. Check if any fan alarms are also active. If active, refer to fan alarm instructions to resolve. 3. Replace the EXxx.

    EXxx TRX module Tx hopping synthesizer 1 fails to lock.

    Tx hopping synthesizer 1 in EXxx TRX module was unable to (maintain) lock to the given channel. 1. Issue a TRX lock/unlock. 2. Issue DTRX HW reset from BTS Manager. 3. Toggle PDU port 4. Replace EXxx.

    EXxx TRX module Tx hopping synthesizer 2 fails to lock.

    Tx hopping synthesizer 2 in EXxx TRX module was unable to (maintain) lock to the given channel. 1. Issue a TRX lock/unlock. 2. Issue DTRX HW reset from BTS Manager. 3. Toggle PDU port 4. Replace EXxx.

    EXxx TRX module Tx power is less than minimum at DPC.

    Tx output power is less than +14.5dBm at Digital Power Control circuit block in EXxx TRX module. 1. Reset TRX/Sector. 2. Issue DTRX HW reset via BTS Manager. 3. Replace EXxx.

    EXxx TRX module Tx power overdriven at DPC.

    Tx output power is over 2 dB higher than expected at Digital Power Control circuit block in EXxx TRX module. 1. Reset TRX/Sector. 2. Issue DTRX HW reset via BTS Manager. 3. Replace EXxx.

    Path A of Rx LNA amplifier chain is broken in ERxx DDU module.

    Both low noise amplifiers in a balanced stage have failed for Path A of ERxx DDU module. 1. Toggle PDU port of the DTRX connected to DDU to allow alarm re-evaluation. 2. Issue a BCF lock/unlock to allow alarm re-evaluation. 3. Replace ERxx.

    Path B of Rx LNA amplifier chain is broken in ERxx DDU module.

    Both low noise amplifiers in a balanced stage have failed for Path B of ERxx DDU module. 1. Toggle PDU port of the DTRX connected to DDU to allow alarm re-evaluation. 2. Issue a BCF lock/unlock to allow alarm re-evaluation. 3. Replace ERxx.

    7607 TRX OPERATION DEGRADED Severity Object affected Object state Unit

    Major TRX Enabled ECxA, ERxA, Exxx Fault reason Instruction

    ESMA System module has lost connection to ECxx RTC module.

    ECxx RTC module does not respond to polling command from ESMA System module. 1. Check the bus cable chain from ESMA to ECxx. 2. If the ECxx LED is off, replace the power cable. 3. Replace ECxx. 4. Replace ESMA.

    EXxx TRX module cooling fan(s) report no rotation.

    One or more fans of the EXxx TRX module are not rotating. There is a danger of overheating. 1. Check that the fan unit cable is correctly mated to EXxx. 2. Check that there are no obstacles preventing the fan(s) from rotating. 3. Clean the fan unit of dust and/or dirt. 4. Replace the fan unit. 5. Replace EXxx.

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    EXxx TRX module has lost connection to ERxx DDU module.

    ERxx DDU module is not responding to poll command from EXxx TRX module. 1. Check that the ERxx cable is correctly mated between EXxx and ERxx. 2. Replace ERxx. 3. Replace EXxx.

    EXxx TRX module Tx power is at least 3dB less than expected at DPC.

    Tx output power is over 3 dB lower than expected at Digital Power Control circuit block in EXxx TRX module. 1. Reset TRX/Sector. 2. Issue DTRX HW reset via BTS Manager. 3. Replace EXxx.

    One amplifier stage of Rx LNA Path A is broken in ERxx DDU module.

    One of the two low noise amplifiers in balanced stage failed in Path A of ERxx DDU module. 1. Toggle PDU port of the DTRX connected to DDU. 2. Issue a BCF lock/unlock to allow alarm re-evaluation. 3. Toggle PDU port of the DTRX connected to DDU to allow alarm re-evaluation. 4. Replace ERxx.

    One amplifier stage of Rx LNA Path B is broken in ERxx DDU module.

    One of the two low noise amplifiers in balanced stage failed in Path B of ERxx DDU module. 1. Toggle PDU port of the DTRX connected to DDU. 2. Issue a BCF lock/unlock to allow alarm re-evaluation. 3. Toggle PDU port of the DTRX connected to DDU to allow alarm re-evaluation. 4. Replace ERxx.

    Path A of Rx LNA amplifier chain is broken in ERxx DDU module.

    Both low noise amplifiers in a balanced stage have failed for Path A of ERxx DDU module. If diversity is used, Path B is still working. 1. Toggle PDU port of the DTRX connected to DDU. 2. Issue a sector lock/unlock to allow alarm re-evaluation. 3. Replace ERxx.

    Path B of Rx LNA amplifier chain is broken in ERxx DDU module.

    Both low noise amplifiers in a balanced stage have failed for Path B of ERxx DDU module. If diversity is used, Path A is still working. 1. Toggle PDU port of the DTRX connected to DDU. 2. Issue a sector lock/unlock to allow alarm re-evaluation. 3. Replace ERxx.

    RSSI detected Rx signal difference exceeding threshold.

    The difference limit of Received Signal Strength Indicator measurement has exceeded between the main and diversity antennas. Supplementary information fields of RSSI alarm from the BSC history will give further details of which antenna has exceeded the threshold value. 1. Check RSSI results with BTS Manager which antenna appears to have abnormal values. If abnormal values are lower than values from other antennas,it indicates a disconnected or faulty cable in the loop or a faulty LNA. If abnormal values are higher than values from other antennas, it indicates interference coming outside of the BTS or a faulty cable/module. 2. Check the actual RF cabling and connections against what is displayed in the BTS Manager. 3. Check whether the selectable RSSI Sample Count is correct considering the BTS site environment

    4. Check that the RXDL parameter at the BSC is set to a reasonable value, taking into account the site condition in order to prevent unnecessary alarms. 5. If the alarm is intermittent, the supplementary information fields in the BSC alarm history (ZEOH) give further details of which antenna has exceeded the threshold values. 6. Check and measure the antenna lines. 7. Check the antenna alignment. 8. Replace ERxx. 9. Replace EXxx.

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    7608 TRX NOTIFICATION Severity Object affected Object state Unit

    Minor TRX Enabled ECxA, ERxA, EXxx Fault reason Instruction

    EXxx TRX module cooling fan speed has increased from the set speed.

    The cooling fan speed of TRX module has increased substantially from the commanded fan speed. 1. Check the ESMA operational voltage as an increased ESMA voltage could lead to overspeeding of the fans. 2. Replace the fan unit. 3. Replace EXxx.

    EXxx TRX module cooling fan speed has reduced from the set speed.

    The cooling fan speed has reduced substantially from the commanded fan speed. 1. Check that nothing obstructs the fan(s) from rotating. 2. Clean the fan unit of dust and/or dirt. 3. Replace the fan unit. 4. Replace ECxx.

    EXxx TRX module temperature high.

    EXxx TRX module has detected that its internal temperature has exceeded +90C/+194F. 1. Ensure that the ambient temperature of the base station is below +50C/+122F. 2. Check if any fan alarms are also active. If active, refer to fan alarm instructions to resolve. 3. Replace the EXxx.

    7616 OSCILLATOR ADJUSTMENT TEMPORARILY INTERRUPTED Severity Object affected Object state Unit

    Minor BCF Enabled ESMA Fault reason Instruction

    Clock tuning DAC word reaching min/max limit.

    Oven oscillator DAC word is within 5% of the min/max limit. Alarm is activated if the DAC word is between 0-204 or 3891-4095. This alarm can be activated due to incorrect synchronisation settings in transmission network. 1. Check the Abis synchronisation that there are valid Rx clock sources available. a) If the reference clock is ok, tune the ESMA clock to the correct frequency. b) If the reference clock is not ok, check the alarm history for 8xxx alarms for the possible reason for the incorrect reference clock. Follow the instructions on 8xxx alarms. After correcting the reference clock tune ESMA clock to the correct frequency.

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    Alarms for Flexi Hopper & FIU 8020 (CC Bank) Blocked from use

    Severity Object affected Object state Module/Unit Major TRE Enabled BOIA,VIFA,ESMA

    Fault reason Instruction

    Field not used.

    A cross-connection is configured to an interface which is not in use. 1. Check that all interfaces where cross connection termination points have been set are in use. In cross connection window, blocked cross connections are highlighted in Italic font. 2. Remove any unnecessary cross connections that have termination point(s) to non-existing or unused interfaces.

    8048 Loss of incoming signal Severity Object affected Object state Module/Unit Critical TRE Enabled BOIA,VIFA,ESMA,FIU

    Fault reason Instruction

    Field not used. External Q1 device does not receive signal at its interface 1. Find out the alarming Q1 device and refer to its product documentation for more details on this alarm.

    8050 Loss of incoming 2 M signal

    Severity Object affected Object state Module/Unit

    Critical TRE Enabled BOIA,VIFA,ESMA,FIU Fault reason Instruction

    Field not used.

    FIxx PIU has detected no incoming signal on E1 interface. Far End Alarm bit indication (TS0/b3) is sent in Tx direction. 1. Check that interface settings are the same at both ends of the link.

    2. Check that the E1 cable is connected to right interface and cable is correctly mated to the PIU. Check the condition of cables, connectors and in case VXTB/FIPA/FIU is used, check the correct polarities of the wire pairs.

    3. Replace port/LIF or VXRB/Fixx/FIU 8064 Alarm signal is received

    Severity Object affected Object state Module/Unit Major TRE Enabled BOIA,VIFA,ESMA,FIU

    Fault reason Instruction

    Field not used.

    The TDM signal is cut, deteriorated or a equipment loop is set in the TDM farend equipment. 1. Check the TDM transmission path to find where the AIS insertion occurs. 2. Check the alarms at the TDM far-end. Refer to the product documentation of the TDM far-end equipment.

    3. Replace VXRB/Fixx/FIU . 8066 AIS 2 M

    Severity Object affected Object state Module/Unit Major TRE Enabled BOIA,VIFA,ESMA,FIU

    Fault reason Instruction

    Field not used.

    The signal is cut, deteriorated or a equipment loop is set in the far-end equipment. 1. Check the transmission path to find where AIS insertion occurs. 2. Check the alarms at the far-end. Refer to the product documentation of the far-end equipment.

    3. In case VXTB/VXRB/FIU/FIFA PIU is used, check that the microwave link is commissioned and operational. Check that 2M cross connections are configured Refer to the FIFA product documentation for further instructions. 3. Replace VXRB/Fixx/FIU .

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    Location: Flexi-Hopper Location: FIU Alarm number Severity Alarm Alarm number Severity Alarm

    0 Critical Fault in power supply 0 Critical Fault in power supply

    1.Check the operating temperature 2.Monitoring supply power levels 3.Check Flex-bus cable quality 4.Replace the unit

    1.Check the operating temperature 2.Monitoring supply power levels 3.Check Flex-bus cable quality 4.Replace the unit

    21-22 Major Loop to interface / equipment 21-23 / 25 Major Loop to interface/ equipment, Test Mode Active, Test generator on

    This indication is consequence for user action This indication is consequence for user action

    45 Critical No outgoing radio signal 48 Critical Loss of incoming signal

    1.Check Tx/Rx-frequencies and TX-power level settings 2. If settings are matching the planning values then try Tx-power restart (off/on) 3. Replace the unit.

    Monitoring Rx-level, if Rx-level is less than expected value then

    1) Check antenna alignment and LOS on both ends and 2) Find a reason for extra attenuation

    (cross-polarization, water in waveguide, rain, etc) 3) Check the common settings of the link ends 4) Replace the unit.

    59 Critical Incoming signal level incorrect 64 Critical Alarm signal is received (AIS)

    Monitoring Rx-level, if it is ok then 1) Check the alarm thresholds and 2) Check hop frequencies and Tx. power value and

    status from far-end 3) if Rx-level is less than expected value then 4) Check antenna alignment and LOS on both ends

    and 5) Find a reason for extra attenuation (cross-polarization, water in waveguide, rain, etc)

    This indication is consequence from OU trouble or poor quality of received signal

    60 / 96 Critical No incoming radio signal, Excessive error rate 81 / 99 / 262 Critical Loss of frame alignment, Error rate > 1 E3, Unavailability

    Monitoring Rx-level, if Rx-level is less than expected value then

    1) check antenna alignment and LOS on both ends and 2) find a reason for extra attenuation

    (cross-polarization, water in waveguide, rain, etc) This indication is also consequence from bad quality of received signal furthermore Check the common settings of the link ends Replace the unit

    This indication is consequence from OU trouble or poor quality of received signal otherwise Flex-bus cabling has damaged, Check cable quality anyway

    100-102 Major Error rate > 1 E4 / > 1 E5 / > 1 E6 This indication is consequence from OU trouble or poor quality of received signal otherwise Flex-bus cabling has damaged, Check cable quality anyway

    128 Major Fault in equipment 113 Critical Buffer overflow (or underflow)

    Replace the unit This indication is consequence from poor quality of received signal by link 141 Critical Forced control on 128 Major Fault in equipment

    This indication is consequence for user action Replace the unit

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    Location: Flexi-Hopper Location: FIU Alarm number Severity Alarm Alarm number Severity Alarm

    142 Critical

    Fault in installation of equipment 137 Critical Fault in oscillator

    Upgrade the latest SW if it won't help then Replace the unit

    Recalibrate the oscillator Replace the unit

    148 / 162 Warning Equipment reset, Database full 141 Critical Forced control on

    This indication is consequence and an other alarm might tell the specific reason for a trouble This indication is consequence for user action

    150 Critical Fault in unit 142 Critical Fault in installation of equipment

    Check the operating temperature Replace the unit

    Check that Flex-bus has set in use or 1) Upgrade the latest SW if alarm information is SW

    incompatibility or 2) Replace module or fill in missing identifications when alarm information is one of the HW module

    165 Major Real time lost fault 144 Critical Operating error This indication is consequence and an other alarm might tell the specific reason for a trouble Replace the unit

    179 Major Far-end alarm 148 / 162 Warning Equipment reset, Database full

    Trouble exists on far-end This indication is consequence and an other alarm might tell the specific reason for a trouble 184 Warning Real time updated 165 Major Real time lost fault

    This alarm is consequence from an auto-function This indication is consequence and an other alarm might tell the specific reason for a trouble

    185 Warning Connection or settings have changed

    179 Major Far-end alarm

    This indication is consequence for user action Check that Tx power value and status are correct ones Trouble exists on far-end

    186 Minor Configuration error 184 Warning Real time updated Fill in missing identifications or Replace the unit This alarm is consequence from an auto-function

    185 Warning Connection or settings have changed This indication is consequence for user action

    186 Minor Configuration error Fill in missing identifications or Replace the unit

    Alarm number severity 15 min / 24 h G826 ES / SES / BBE threshold crossed 256-261

    Each of these indications are consequence from OU trouble or poor quality of received signal otherwise Flex-bus cabling has damaged, Check cable quality anyway

    263 Warning Statistics reset This indication is consequence for user action

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    BSC 3i Frequently used Commands

    COMMAND LIST H Z A ALARM HISTORY HANDLING COMMANDS

    O PRINT ALARMS CURRENTLY ON P PRINT ALARM HISTORY

    ZD SYSTEM SUPPORT AND COMMUNICATION Z D D REMOTE DEBUGGER SESSION COMMANDS S START REMOTE SESSION E EXECUTE DEBUGGER COMMAND T START REMOTE PREPROCESSOR SESSION X EXECUTE PREPROCESSOR DEBUGGER COMMAND Z D T PRIMARY RATE ACCESS D-CHANNEL STATE MANAGEMENT COMMANDS C MODIFY D-CHANNEL WORKING STATE I INTERROGATE D-CHANNEL WORKING STATE T MODIFY D-CHANNEL WORKING STATE OF FUNCTIONAL UNIT F INTERROGATE D-CHANNEL WORKING STATE OF FUNCTIONAL UNIT

    ZE CELLULAR RADIO NETWORK ADMINISTRATION Z E E BASE STATION CONTROLLER HANDLING COMMANDS I OUTPUT RADIO NETWORK CONFIGURATION L OUTPUT TRX RADIO TIME SLOTS P OUTPUT BACKGROUND DATA ACTIVATION STATES Z E F BASE CONTROL FUNCTION HANDLING COMMANDS C CREATE BASE CONTROL FUNCTION D DELETE BASE CONTROL FUNCTION M MODIFY BASE CONTROL FUNCTION PARAMETERS O OUTPUT BASE CONTROL FUNCTION PARAMETERS S CHANGE BASE CONTROL FUNCTION ADMINISTRATIVE STATE T SET BASE CONTROL FUNCTION OUTPUTS X SET BASE CONTROL FUNCTION EXTERNAL INPUT PARAMETERS R RESET BASE CONTROL FUNCTION E MODIFY EXTERNAL INPUT AND OUTPUT TEXT P OUTPUT EXTERNAL INPUT AND OUTPUT TEXTS Z E O BASE TRANSCEIVER STATION ALARMS HANDLING COMMANDS B BLOCK ALARM U UNBLOCK ALARM E LIST BLOCKED ALARMS C CHANGE ALARM CLASS M MODIFY ALARM PARAMETERS O OUTPUT ALARM PARAMETERS R CANCEL ALARM H LIST ALARM HISTORY L LIST ALARMS CURRENTLY ON

    ZN SS7 NETWORK ADMINISTRATION ZN E SIGNALLING NETWORK STATE INTERROGATION COMMANDS R INTERROGATE SIGNALLING ROUTE SET STATES S INTERROGATE SIGNALLING LINK SET STATES L INTERROGATE SIGNALLING LINK STATES T INTERROGATE NETWORK ITEM STATES O INTERROGATE SIGNALLING POINT LOAD SHARING P INTERROGATE PROHIBITED STP MESSAGES J RUN SIGNALLING ROUTING TEST

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    Trouble Shooting Tips for Ceragon SDH Radio Sr. No. Alarms Alarm Severity Corrective Action

    1 Loss of Signal on Fiber Service affecting alarm

    Check Fiber cable connectivity Clean Fiber cable Replace fiber cable Replace IDM

    2 Tx Level out of Range Link will start toggling Replace ODU Switch over to other ODU

    3 Loss of frame on Radio Raised

    Normally this alarm comes when there is interference in the link/Link Misaligned/Water

    entered into IF cable/Improper connectorisation

    Check Rx Level if its ok then Check for interference, If no interference Check RF loop back to identify the problem

    4 Remote

    communication Failure raised

    May or May not be service affecting alarm

    Check Rx Level if its OK then Verify inband settings Clean IDC ,If problem still persists Replace IDC

    5 Drawer ODU

    communication Failure Raised

    Service affecting alarm

    Replace IDM,If problem still persists Clean IDC ,If problem still persists Check If cable connectivity Replace IDC ,If problem still persists Replace ODU

    6 ODU Rx Level out of Range raised Mainly comes during rainy season, Service

    affecting alarm

    Check RF loop back both at Near end and Far end to identify the problem Check for Link Misalignment Check frequency setting ,If frequency in both the drawers are different, make it correct and then check the connectorisation of frequency changed ODU

    7 Wayside channel los Non Service affecting alarm Check Wayside cable

    8 Signal Degrade on radio Raised Results Link Fluctuation, Service affecting

    alarm

    Check Rx Level if its OK then Check Interference, If no interference found then Switch over the Far end transmitting ODU ,If it solves the problem then check the ODU and connectorisation of Far end ODU otherwise check the Near end ODU connectorisation and IF cable

    9 Signal Degrade on Fiber Raised Results Link Fluctuation, Service affecting

    alarm

    Check Fiber cable connectivity Clean Fiber cable Replace fiber cable Replace IDM

    10 TIM on Fiber Raised Non Service affecting alarm Disable J0 operation

    11 RFU Rx level Path out of

    Range Raised Service affecting alarm Check for Link Fading

    12 Configuration Mismatch Raised Non Service affecting alarm Use copy configuration command to copy the configuration from Drawer to IDC

  • FLM Engineer Handbook

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    Trouble Shooting Tips for NEC SDH Radios

    Alarm Items

    Alarm Description Equipment where Alarm is from

    Items to Check Possible Cause of Failure or Action to Take

    1 MAIN INTFC LOS (MUX)

    Input STM-1 signal is lost (From MUX) IDU IDU No 1/2

    a) Check data input cable and connector failure from MUX (Short-circuit)

    Data input cable and connector failure

    b) Check MUX MUX

    2 MAIN INTFC LOF (MUX)

    Frame synchronization of input STM-1 signal (From MUX) is lost

    IDU IDU No 1/2

    a) Check data input cable and connector failure from MUX (Short-circuit)

    Data input cable and connector failure

    b) Check MUX

    3 E-BER (MUX)

    BER is worse than preset value (10-3 to 10-5 IDU , selectable)

    IDU No 1 /2

    a) Check data input cable and connector failure from MUX (Short circuit/Loose connect)

    Data input cable and connector failure

    b) Check MUX MUX

    4 SD (MUX)

    BER is worse than preset value (10-5 to 10-9 IDU , selectable)

    IDU No 1 /2

    a) Check data input cable and connector failure from MUX (Short circuit/Loose connect)

    Data input cable and connector failure

    b) Check MUX MUX

    5 MAIN INTFC LOS (DMR) Input STM-1 signal is lost (From Radio) IDU IDU No 1 /2

    a) Check IDU and INTFC card IDU/INTFC failure

    6 MAIN INTFC LOF (DMR)

    Frame synchronization of input STM-1 signal (From Radio) is lost

    IDU IDU No 1 /2

    a) Check IDU and INTFC card IDU/INTFC (IDU replace)

    7 E-BER (DMR)

    BER is worse than preset value (10-3 to 10-5 IDU , selectable)

    IDU No 1 /2

    a) Check RX LEVEL, if lower>> Antenna system or natural fading

    b) Check opposite Station Opposite station

    c) Check IDU and INTFC card IDU/INTFC (Replace IDU)

    8 SD (DMR)

    BER is worse than preset value (10-5 to 10-9 IDU , selectable)

    IDU No 1 /2

    a) Check RX LEVEL, if lower>> Antenna system or natural fading

    b) Check opposite Station Opposite station

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    9

    MAIN INTFC

    150M INTFC/OPT INTFC/10/100BASE-T INTFC module failure

    150M Intfc/Opt Intfc /10/100BASE-T Intfc

    a) Check IDU/INTFC card IDU/INTFC (Replace IDU)

    10 LINK

    Link of LAN (10/100 BASE-T INTFC) and associated equipment is not established

    Link 1/ 2

    a) Check data input cable and connector failure from/to DTE

    Data input cable and connector failure

    b) Check DTE DTE

    c) Check LAN card inside IDU LAN INTFC (Replace IDU)

    11 SUB INTFC

    WS INTFC,WS/ALM INTFC, ALM INTFC or LAN CARD(DSC) module failure

    WS, WS/ALM, ALM INTFC or LAN Card

    a) Check each Sub Module Sub INTFC (Replace Sub Intfc)

    12 MD CPU ALM Communication between modules failure IDU IDU No 1/ 2

    a) Check IDU IDU(Replace IDU)

    13 MOD ALM

    Modulator failure IDU IDU No 1 /2

    a) Check Atmosphere Temperature Improve environment condition of IDU

    b) If continues MOD alarm on, IDU(Replace IDU)

    14 DEM ALM

    Demodulator failure and input IF signal is lost IDU IDU No 1 /2

    a) Check RX LEVEL, if lower>> Antenna system or natural fading

    b) Check Frame ID using LCT or PNMT/S IDU Setting

    c) Check Atmosphere Temperature Improve environment condition of IDU

    d) If continues MOD alarm on, IDU(Replace IDU)

    15 High BER ALM

    BER is worse than preset value (10-4 to 10-6 IDU , selectable)

    IDU No 1/2

    a) Check RX LEVEL, if lower>> Antenna system or natural fading

    b) Check opposite Station Opposite station

    c) Check IDU IDU(Replace IDU)

    16 Low BER ALM

    BER is worse than preset value (10-6 to 10-12 IDU , selectable)

    a) Check RX LEVEL, if lower>> Antenna system or natural fading

    b) Check opposite Station Opposite station

    Check IDU

    MODEM failure IDU IDU No 1 /2

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    17 MODEM a) Check IDU Replace IDU

    18 PS

    DC-DC CONV failure IDU IDU No 1 /2

    a) Check DC Line voltage provided to IDU DC Voltage unstable

    b) Check Power cable and connector Power CBL Connector

    c) If continuous PS ALM on Replace IDU

    19 TX PWR ALM

    Transmit RF power increases/decreases approx 3dB from normal

    ODU ODU No 1/2

    a) Check Atmosphere Temperature Improve environment condition of ODU

    b) If continues TX PWR ALM alarm on, Replace ODU

    20 TX INPUT ALM

    TX IF input signal from the IDU is lost ODU ODU No 1/2

    a) Check IF Cable and Connector IF cable and connector failure

    b) Check IF Cable Loss IF cable loss

    21 RX LEVEL ALM

    Receiver input level decreases below squelch level as shown below 32QAM : -81dBm 128QAM : -72dBm

    ODU ODU No 1 /2

    a) Check RX LEVEL, if lower>> Antenna system or natural fading

    b) Check opposite site Opposite site

    22 APC ALM Local oscillator is unlocked ODU ODU No 1/2

    a) Check Atmosphere Temperature Improve ODU temperature

    b) If continues alarm on Replace ODU

    23 CABLE ALM Communication between the ODU and IDU is lost

    IF CBL

    Cable No 1 /2

    a) Check IF cable and connector IF cable and connector failure

    24 MAINT

    The equipment is in maintenance mode. In this mode, the following control can be performed.

    ATPC manual control Loopback TX mute ALS manual restart CW

    MAINT

  • FLM Engineer Handbook

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    Trouble Shooting Tips for Tejas Mux

    SETUP 1: - How to change the IP Address of the Laptop? To change the IP address of the Laptop, go to the following path, Start Setting Network and Dial Up Connection Double click on Local Area Connection Properties Internet Protocol (TCP/IP) Properties give the required IP address, Subnet Mask and Default Gateway. 2: - Internet Explorer setup. Open Internet Explorer Go to Tools Internet Options Connections set the following Make Never Dial a connection In LAN Setting Make Auto Detect Setting, and remote setting by un-ticking on proxy setting. Then select OK LOGIN 3: - How to Login to the Node? To Login to the node: - Suppose the IP address of your node is 192.168.1.254 Set the IP address of your Laptop to IP : - 192.168.1.100 Subnet mask : - 255.255.255.0 Default Gateway: - 192.168.1.254 this is the Ethernet IP address of node. Once the IP is set, open the Internet Explorer and in the address bar type the following line http://192.168.1.254:20080 and Press enter Username: - tejas Password: - j72e#05t 4: - How to Login to Remote Node? To Login to remote node check the following setting in the node: - Set the gateway in the laptop, the gateway should be the Ethernet IP of the Local Node. Now in Local node, go to Fault Management Diagnosis OSPF Monitoring Page Neighbor. This page should show the Router ID of the remote node and the state should be FULL. In the Address bar of Internet explorer Page, type the Router ID of the remote node Example: - if the remote node Router ID is 192.168.200.2 then type the following line http://192.168.200.2:20080 Username: - tejas Password: - j72e#05t 5: - How to create a cross connect? Click on Configuration (main menu) -----> Click on Cross connect --->Click on Add Cross connect Cross connect capacity =VC12 Circuit Identifier =User dependent Source port =STM1-3-1 Source time slot (K, L, M) =select from the menu (TUG Structure) Destination port =E1-4-1 (If trib card is in 4th slot and we are using 1st port) Destination time slot = --- Enable Source protection and select the TUG Structure. Submit the changes and accept the modifications.

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    Repeat the above same steps for other E1 6: - How to check the alarms? Click on Faults (Main Menu) ----> See the Active Alarms Click on Faults (Main Menu) ----> See the Suppressed Alarms Click on Faults (Main Menu) ----> See the Alarms History 7: - Troubleshooting. Alarms: - LOS on STM Port: -

    Type Critical Alarm Color RED Alarm Name Loss Of Signal Alarm Description The TX from the other node is not getting received.

    Alarm Indication

    (a) On Alarm Window, it will show Critical alarm with Particular STM port as Object. (b) On the STM card the RED led on the RX of the card. (c) On the alarm display, RED critical LED should glow.

    Alarm Clearance

    (a) Check the Power at the RX of the Port (b) Clean the Fiber and port with alcohol (c) Check the Patch cord connecting the System and Optical Distribution Panel.

    PDH Port: -

    Type Major Alarm Color Orange Alarm Name Loss Of Signal Alarm Description The TX from the other node is not getting received on the PDH port

    Alarm Indication (a) On Alarm Window, it will show major alarm with Particular PDH port as Object. (b) On the alarm display, Orange Major LED should glow.

    Alarm Clearance

    (a) Check the cable connectivity from the other node (b) Check the Cable connecting the E1 card and the DDF (c) Check the patch panels, if there is any problem, replace the DDF if possible.

    LOF: -

    Type Major Alarm Color Orange Alarm Name Loss Of Frame

    Alarm Description LOF will come due to hardware failure or Signal Degrade condition on STM port.

    Alarm Indication (a) On Alarm Window, it will show major alarm with Particular SDH port as Object. (b) On the alarm display, Orange Major LED should glow.

    Alarm Clearance (a) Put Self Loop to the SDH Port and Check for Port failure (b) Check Optical Power and Performance for Particular SDH port (c) Check the Patch Cord

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    AIS For AU

    Type Major Alarm Color Orange Alarm Name AU-AIS (Administrative Unit Alarm Indication Signal)

    Alarm Description This Alarm is raised when LOS, MS-AIS, AU_LOP, exists on an upstream neighboring Node, having Cross connecting on the same level.

    Alarm Indication (a) On the alarm view, AU-AIS will appear on that particular Object (b) On the Alarm display, an Orange Major will appear.

    Alarm Clearance (a) If this alarm is present, that means there is some alarm in the neighboring node, which has be cleared. (b) Check the Optical port with Loop back

    For TU

    Type Major Alarm Color Orange Alarm Name TU-AIS (Tributary Unit Alarm Indication Signal)

    Alarm Description This Alarm is raised when LOS, MS-AIS, AU_LOP, TU, TIM, Signal Label exists on an upstream neighboring Node, having Cross connecting on the same level.

    Alarm Indication (a) On the alarm view, TU-AIS will appear on that particular Object (b) On the Alarm display, an Orange Major will appear.

    Alarm Clearance (a) If this alarm is present, that means there is some alarm in the neighboring node, which has be cleared. (b) Check the Optical port or TU12 Loop back with Loop back

    RDI Line RDI / MS-RDI

    Type Critical Alarm Color RED Alarm Name Remote Defect Indication Line

    Alarm Description This Alarm indicates that the Remote system has LOS/LOF/Exec Error rate on the STM Port.

    Alarm Indication (a) On the alarm view, RDI-Line will appear on that particular Object (b) On the Alarm display, a RED Critical will appear.

    Alarm Clearance (a) Check the Other end node for Loss on STM Port. (b) Check the Optical port Loop back AU- RDI

    Type Major Alarm Color Orange Alarm Name Remote Defect Indication AU

    Alarm Description This Alarm indicates that the Remote system has LOF/AIS/LOP on the AU of the particular Port.

    Alarm Indication (a) On the alarm view, RDI will appear on that particular Object (b) On the Alarm display, an Orange-Major will appear.

    Alarm Clearance (a) Check the Other end node for alarms on that particular AU (b) Check the Optical port Loop back

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    TU-RDI

    Type Major Alarm Color Orange Alarm Name Remote Defect Indication TU

    Alarm Description This Alarm indicates that the Remote system has LOF/AIS/LOP on the TU of the particular Port.

    Alarm Indication (a) On the alarm view, RDI will appear on that particular Object (b) On the Alarm display, an Orange-Major will appear.

    Alarm Clearance (a) Check the Other end node for alarms on that particular TU (b) Check the Optical port Loop back System in Free running

    Type Major Alarm Color Orange Alarm Name System in free running mode Alarm Description If there is no clock nominated

    Alarm Indication (a)On the alarm view, system clock in free running (b) On the Alarm display, a Yellow Alarm- Minor

    Alarm Clearance (a) Nominate a clock (b) Contact Tejas TAC support. Card missing or removed

    Type Major Alarm Color Orange Alarm Name Card is removed Alarm Description The card is removed or some other type of card is being plugged in.

    Alarm Indication (a) On the alarm view, Card missing or removed (b) On the Alarm display, a Orange Alarm-Major

    Alarm Clearance (a) Either delete the card from inventory or place the same card in the slot. (b) Contact Tejas TAC support.

    (7) PLM

    Type Major Alarm Color Orange Alarm Name Path Label Mismatch Alarm Description The received and Transmitted Signal label does not matches

    Alarm Indication (a) On the alarm view, PLM on that particular Object (b) On the Alarm display, a orange Major

    Alarm Clearance (a) Set the Transmit Signal label to desired value on the node 2 (b) Contact Tejas TAC support. (8) Signal Label Uneq

    Type Major Alarm Color Orange Alarm Name Received Signal Label is Unequipped Alarm Description Path label received is Unequipped

    Alarm Indication (a) On the alarm view, Uneq on the particular Object would be observed. (b) On the Alarm display, a orange Major

    Alarm Clearance (a) Set the Transmit Signal label to desired value on the node 2 (b) Contact Tejas TAC support.

  • FLM Engineer Handbook