Optical Fiber Access Network OFAN& ZXA10

Presented By:

Ammara Khan Baloch

Table of Contents

• Why AN?• Definition of AN• Structure of AN• Definition of OLT• Structure of OLT• Definition of ONU• Structure of ONU• Modules of ONU• Build-in SDH

Why we need Access Network?

1 ） The reason of technologyMostly, it is because of digital transfer system,

especially, the optical transfer system.

2 ） The reason of Market requirementFor the Operation and Maintenance.

3 ） The reason of competitionThe telecom company want to get cheaper sy

stem.

Definition of Access Network

AN: the transmission entity between the SNI and UNI;

SNI: Service Network Interface;

UNI: User Network Interface;

ZXA10-OLTB

PSTNPSTNPSTNPSTN

DDNDDNDDNDDN

ATMATMATMATM

IPIP

100BASE-T

V5

ISDN

POT S

ONUB

SDHSDH

ONUB ONUB

ADSL

DDN

Ethernet

Service NodesService Nodes

Access networkAccess network

user Nodesuser Nodes

Definition of Access Network

• OFAN serves as the junction between Local Exchange (LE) and the subscriber terminal equipment, and is connected to LE through the service network interface.

Structure of Optical Fiber Access Network

The functional structure of OFAN is:

• Access Network (AN)

• Optical Line Terminal (OLT)

• Optical Network Unit (ONU)

• Network Management System (NMS)

Definition of OLT• OLT function is to provide OFAN with the interface between the network

side and the LE, and to communicate with ONU of the subscriber.

• “Interface b/w an optical line and the network”.

• OLT can completely isolate the switching function of LE from the subscriber access.

• OLT is placed at the exchange end together with LE.

• OLT is connected to multiple ONU’s that can be used in networking of point-to-point, chain, and ring network.

• Large capacity OLT equipment with 19’ rack structure;• High integration density ODT board, with 8 E1 per card and 12

0 E1 per module. All these E1 can be assigned to connect V5 or ONU as per actual requirements;

Concentration ratio can be adjusted freely to meet different traffic model;

High performance multi cpu system, can meet the high traffic requirements;

Single module provides 10240 lines and for single rack 3 modules can be mounted together to provide more lines;

Main boards, such as MP, SSU, are working in master/slave mode, to provide high reliability.

Features are:•Hubbing•Multiplexing•Cross-Connection.

ZXA10-OLTB

ZXA10-OLTBPOWERH

ODT1

ODT2

ODT3

ODT4

ODT5

ODT6

ODT7

SSU

SSU

MP MP

ALC

ODT14

ODT15

TPU

ALC

POWERH

ODT8

ODT9

ODT10

ODT11

ODT12

ODT13

ALC

ALC

For expansion purpose, this sub rack can be added and these POTS cards are optional.

•This is the common module of OLTB system which consist of 2 sub racks; and for V5 system, only this module is required;

• Single module OLTB (full configuration) supports 10240 POTS.

•ZXA10 supports multi-module smooth expansion, a standard 2M rack with 3 modules supports 30720L (each sub rack height is 6U and the rack height is 42U).

MSTP layer

Control layer

Trunk layer

BDM layer

CSV layer

Fan layer

Battery layer

Built-in environmentdetectors

Built-in power supply

Structure of OLT

Built-in transmission system

Narrowband service process layer

Broadband service process layer

Hardware Structure of OLTOn OLTB, there are three layers: • Control layer (MCTLB )• ODT layer( MODT) • Subscriber layer (MALC).

The board configuration of MCTLB:

12-141-2 3

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MPB

MPB

ZXA10-OLTB: MPB1. Two MPs work in hot backup mod

e 2. MPB is the central processor of th

e entire POTS service element 3. MP store all the alarms and config

uration data.4. Communicate with boards

such as ODT and SSU.5. Implementing data

synchronization and monitoring the working status of the other.

6. Provide the system operation and maintenance function.

回目录

ZXA10-OLT: SSU

1. Two SSU Cards work in hot backup mode

2. Clock synchronization functions3. N*64K cross-connection functions4. Conference call functions With the

switching capability of 4K*4K

ZXA10-OLT: ODT

1. 1 ODT Card provide 8 E1 2. The V5 signaling channels

configured in different two ODT Card redundancy

3. Any one E1 can be configured as required

a) V5 interface connecting with LE b) Normal E1 connecting POTS

module

ZXA10-OLT: POWERH

POWERH outputs 4 voltages: +5VA(D), –5VA, -48VRinging current 75VAC (hot backup mode)

The board configuration of MODTB:

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The board configuration of subscriber layer:

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TRK:• At OLT side, TRK is used in ZXA10 to connect to switch.• At ONU side ALC is used to connect to ordinary subscriber

telephone set, expanding Z interface.• There are 16L in one TRK board.

TPU• TPU is the main processor board of ZXA10 SU2 user unit.• At maximum one TPU can control 12 subscriber boards.• TPU can provide at most four 4 E1 interface.• Two TPU serves as backup for each other. 2 TPU work in load

sharing mode to manage subscriber boards.

Definition of ONU

• ONU is used to provide OFAN with interface at the subscriber side.

• ONU is connected to number of subscriber terminals.

• ONU is capable of optical-electrical conversion.

• Maintenance and monitoring functions.• ONU is placed in the vicinity of subscriber.

• ONU is the equipment used to implement FTTB, FTTC and FTTZ.

• ONU provide various interface to connect to the subscribe, support various subscriber terminal such as POTS, ISDN and leased line.

Structure of ONU:

• ONU is composed of – Processing Nodes– Transmission Nodes

ONU

Transmission node consist of following type:• Built-in 155M/622M SDH optical transmission

equipment• ATM broadband transmission equipment

ZXA10 OFAN provide build-in SDH optical transmission systems:– ZXA10-AS1– ZXA10-AS2– ZXA10-S200– ZXA10-S300

• ONU consist of following cards:– SU (Subscriber Unit)

– ALC (Analog Subscriber Card)

– DLCA (Digital Subscriber Card)

– TPU ( Main processor board)

– POWERH (Power board)

– TSLC (Subscriber line test board)

– AUDB (2/4 Audio board)

– DLC

– HLC (Hotline board)

– HSB

– DIB (64K G.703)

Analog Subscriber Board (ALC):

• ALC is used to provide the analog subscriber Z interface.• Implements POTS service.• Providing 32 subscriber lines• Most popular card in ZXA10.• 1 SU can be inserted with up to 12 ALC’s.• Basic functions are:

B_Battery feeding functionO_Over Voltage ProtectionR_Ringing functionS_Supervision FunctionC_Codec functionH_Hybrid functionT_Test function

2B+D Digital Subscriber Board (DLCA):

• Provide 2B+D interface• 1 DLCA = 8 ISDN sub• 2/4 wire conversion• Over voltage protection• Offer test interface• Self –loop testing• Remote power supply.2/4 Wire Audio Board (AUDB)

• It is used to convert analog signal into digital signal.• Convert audio and data into digital form• Provide 8 voice ports.• Output/input levels are adjustable through software.• Provide two transmission modes

– 2 line – 4 line

Hotline board (HLC):• Resembles semi-permanent leased line service.

• One HLC provide hotline interface , plugged with ALC in SU unit.

• 1 HLC = 8 hotlines

FLC card:• FLC is used to support the public payphone subscribers.

• Each board can support 16 sub lines.

ADSL subscriber board• ADLG board is used for providing ADSL service.

• Each ADLG board support 16 ADSL subscriber.

• Each ADLG support 4 uplink E1 interface.

Subscriber line test board (TSLC):• There are mainly two test boards used in ZXA10-SU.

– TSLCB

– TSLCC

• TSLCB is used for analog subscriber lines and terminals

• TSLCC is used for digital tests on ISDN in addition to tests on ordinary analog subscribers.

• Test boards has the following functions:– Test of external line

– Test of internal line

– Test of subscriber telephone

Multi Service Access Model

OLT: Optical Line Terminal; ONU: Optical Network Unit.

ZXA10 ONU Module

IN/1500OUT30

OUT40

ONU200

OUT50

ZXA10-IN1500

Transmission Unit

SU2 * 4

Rectifiers

MDF

ODF

Back-up Batteries

Front view Side-view

2000*800*650 mm 200KG

CSV

RT: ZXA10-IN1500Indoor model ONUB equipment, 19’ rack with height 42U;

ZXA10-SU2 can provide multi service access function:POTSISDN-BRA 2B+DISDN-PRA 30B+DE1 Leased LineV.35/V.24/G.703 (64Kbps, n*64Kbps, and Sub rate – 19.2Kbps, etc.)ADSL InterfaceSHDSL Interface10M/100M Ethernet

Accuracy remote line test function is provided;

For transmission system, ZXA10-AS1/AS2 or any other SDH/PDH/ATM system can be adopted;

Large capacity, standard configuration with 4 ZXA10-SU2 is 1536L and the maximal configuration with 7 ZXA10-SU2 is 2688L;

Built-in MDF is provided.

RT: ZXA10-IN1500ZXA10-SU2

POWER

DLCA

ALC

ALC

HDB

HSB

TPU

TSLC

ADLC

TPU

DIB

FLC

ALC

ALC

32 POTS 8 ISDN

BRA

4 sub rates or 64Kbps

4 N*64K

Line test

8 ADSL

4 SHDSL

19’ sub rack with 6U height;

2 TPU are working in mutual aid mode;

All the subscriber slots are common (yellow), the boards can be interchanged;

The ZXA10-SU2 can be used in every kinds of ZXA10-ONUB system; so all services which can provide can be provided in each ONUB system also.

8 ports

RT: ZXA10-OUT30

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6U

6U

1U1U1U1U2U

2U

15A Rect i fi er

Fan

100AHBat tery

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Bui l t - i n SDH

Ai r Condi t i oner

Orderwi re,MDF,

And soon

15A Rect i fi er

Fake panel

Fi ber i nser t i on box

CSV

Rack Dimension ： 1920mm*1350mm*710mm(H*W*L)

Net weight 200kg, full configuration weight 300kg

Temperature:

-35℃ ～ +55℃Relative Humidity ：

5 ％～ 95 ％AC Consumption ： 1500

W(refrigeration) ， 400

W(calefaction)Capacity:

2 ZXA10-SU2: 768L

3 ZXA10-SU2: 1152L

ZXA10-ONU200

–Rack Dimension: 1300mm×810mm×377mm (H×W×L)

–Net weight 90kg, full configuration weight 160kg

–Temperature:

– 0℃ ～ 45℃–Relative Humidity:

– 20 ％～ 80％ –Indoor model

–Wall-mounted or Ground-mounted

–Capacity: 192L

1 2 3 4 5 6 7 8 9 10

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FAKE PANEL

POWER D

24AH BATTERY

POWER D

FAN FAN

ZXA10- SU2- C

24AH BATTERY

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15A RECTIFIER

CSV

INBUILT SDH

RECTI FI ERE CSV AS2、 、PON- R、

MDF

MDF

MDF

ZXA10-OUT40

• Rack Dimension: 1450mm×1500mm×500mm (H×W×L)• Full configuration weight: 250kg• Temperature: -35℃ ～ 55℃• Relative Humidity: 5 ％～ 95 ％ • Outdoor model and Ground-mounted or pole-mounted• Capacity: 1 ZXA10-SU2 384L (ZXA10-AS1); 2 ZXA10-SU2 768L (ZXA10-AS2)

Built-in SDH: ZXA10-ASx– Built-in SDH system

• ZXA10-AS1, maximum 126 E1s per NE (double STM-1 configuration), normally used in COT side;

• ZXA10-AS2, maximum 10 E1s, compact STM-1 system, normally used in RT side to reduce the cost;

• ZXA10-AS3, maximum 8 E1s;

• ZXA10-AS4, STM-1/STM-4 combined system, can be configured dynamically as per the actual requirements, normally used in COT side with multi-layer networking requirement.

BUILT-IN SDH: ZXA10-AS1

• 2 optical STM-1 port per OL card• SCU provide synchronization clock• DXC provide 4*STM-1/VC12 fully cross• TRU provide 16 2M (Max) in each card• NS main control card in case of it fail under power on, no affection to whole system• Normally, it is used in COT side

POWERH

TRU

TRU

TRU

TRU

DXC

DXC

OL

OL

NS

SCU

SCU

TRU

TRU

TRU

TRU

BUILT-IN SDH: ZXA10-AS2

19 Inch, 1 U, Compact STM-1 system

2 Optical Interface (west and east), 10 E1

BUILT-IN SDH: ZXA10-AS3

19’ and 2U box, compact design;

2 optical direction and 8 E1;

It can be used in the system which capacity is not so big and does not need more than 2 optical directions;

Normally, in AN system we propose the ZXA10-AS2 instead of this one.

BUILT-IN SDH: ZXA10-AS4

ZXA10-AS4 is STM-4/STM-1 combined compact SDH system, which adopts the ZXSM-600 (V2) technology;

19’ and 4U chassis;

Supporting many kinds of service, E1/E3 or T1/T3 or STM-1 can be configured as per the actual requirement;

Normally, it is used in COT side where the requirements are very high, for example, more E1s, more optical directions or both STM-1 and STM-4.

telephone servicetelephone service

OLTB STRUCTURE

SDH/ATM

ODT

SSU

MP

ODT

DDN

LE

DDN

NM

ONUB STRUCTURE

SDH/ATM

ALC

TPU

TSLC

ISDN

E/P DogPSTNPSTN

Voice

Service Realization Diagram

SU2

SDH

STM-1

Twisted pair

OLTB

SDH

LE

2M

ATCOT

Home/Office

ODT

ODT

DLCA

TPU

2M

V5.2

ISDN NT1/NT PLUS

PC Telephone

U

ISDN – V5

THANK YOU!