configure core settings for device pools - cisco · configure core settings for device pools •...

Configure Core Settings for Device Pools

• Core Settings for Device Pools Overview, page 1

• Core Settings for Device Pools Prerequisites, page 4

• Core Settings for Device Pools Task Flow, page 4

Core Settings for Device Pools OverviewIn Cisco Unified Communications Manager, configure your core system settings, such as a server group, timezone information, and a region (codec selection). These settings are fundamental and become the foundationfor basic device pools.

Phone NTP ReferencesNetwork Time Protocol (NTP) references in Cisco Unified CM Administration ensures that an IP phone thatis running SIP gets its date and time from an NTP server. If a phone that is running SIP cannot get its dateand time information from the provisioned “Phone NTP Reference,” the phone receives this information whenit registers with Cisco Unified Communications Manager.

Date/Time GroupsWith date/time groups, you can define time zones for the various devices that are connected to Cisco UnifiedCommunicationsManager. The default group, CMLocal, configures automatically upon installation. However,We recommend that you configure a group for each local time zone.

CMLocal synchronizes to the operating system date and time whenever you restart your system or upgradeit to a new release. Do not change the name of CMLocal.

Note

System Configuration Guide for Cisco Unified Communications Manager, Release 11.0(1) 1

RegionsRegions provide capacity controls for Cisco Unified CommunicationsManager multi-site deployments whereyou may need to limit the bandwidth for individual calls that are sent across a WAN link, but use a higherbandwidth for internal calls. Additionally, the system uses regions for applications that only support a specificcodec.

Cisco Unified Communications Manager supports video stream encryption and the following audio codecs:

DescriptionAudio Codec

Themost commonly supported codec, used over the public switched telephonenetwork.

G.711

Wideband codec often used in video conferences. This is always preferred byCisco Unified CommunicationsManager over G.711, unless G.722 is disabled.

G.722

Low complexity wideband codec operating at 24 and 32 kb/s. The audio qualityapproaches that of G.722 while using, at most, half the bit rate.

G.722.1

Low bit rate codec with 6.3 or 5.3 kb/s compression for Cisco IP Phone 12SP+ and Cisco IP Phone 30 VIP devices.

G.723.1

Low bit rate codec that video endpoints support.G.728

Low bit rate codec with 8 kb/s compression that is supported by Cisco UnifiedIP Phone 7900, and typically used for calls across a WAN link.

G.729

The global system for mobile communications (GSM) codec. GSM enablesthe MNET system for GSM wireless handsets to operate with Cisco UnifiedCommunications Manager.

GSM

Advanced Audio Coding-Low Delay (AAC-LD) is a super-wideband audiocodec that provides superior sound quality for voice and music. This codecprovides equal or improved sound quality over older codecs, even at lower bitrates.

L16

Supported for SIP devices, in particular, Cisco TelePresence systems.AAC-LD (mpeg4-generic)

Low-overhead MPEG-4 Audio Transport Multiplex (LATM) is asuper-wideband audio codec that provides superior sound. Supported for SIPdevices including Tandberg and some third-party endpoints.

AAC-LD (mpeg4-generic) and AAC-LD (MPA4-LATM) are notcompatible.

Note

AAC-LD (MP4A-LATM)

An adaptive wideband audio codec, specially designed to deliver widebandsound quality with low delay in both low and medium bit rate applications.

Internet Speech AudioCodec (iSAC)

System Configuration Guide for Cisco Unified Communications Manager, Release 11.0(1)2

Configure Core Settings for Device PoolsRegions

DescriptionAudio Codec

Provides audio quality between G.711 and G.729 at bit rates of 15.2 and 13.3kb/s while allowing for graceful speech quality degradation in a lossy networkdue to independently encoded speech frames. iLBC is supported for SIP, SCCP,H323, and MGCP devices.

H.323 Outbound FastStart does not support the iLBCcodec.

Note

Internet Low Bit RateCodec (iLBC)

The required standard codec for 2.5G/3G wireless networks based on GSM(WDMA, EDGE, GPRS). This codec encodes narrowband (200-3400 Hz)signals at variable bit rates ranging from 4.75 to 12.2 kb/s with toll qualityspeech starting at 7.4 kb/s. AMR is supported only for SIP devices.

Adaptive Multi-Rate(AMR)

Codified as G.722.2, an ITU-T standard speech codec formally known asWideband, codes speech at about 16 kb/s. This codec is preferred over othernarrowband speech codecs such as AMR and G.711 because it provides betterspeech quality due to a wider speech bandwidth of 50Hz to 7000Hz. AMR-WBis supported only for SIP devices.

Adaptive Multi-RateWideband (AMR-WB)

Opus codec is an interactive speech and audio codec, specially designed tohandle a wide range of interactive audio applications such as voice over IP,video conferencing, in-game chat, and live distributed music performance.

This codec scales from narrowband low bit rate to a very high quality bit rateranging from 6 to 510 kb/s.

Opus is supported for SIP devices. The Opus codec service parameter OpusCodec Enabled is set to Enabled for All Devices by default. The serviceparameter settings can be configured to enable Opus codec for all non-recordingdevices or can be set to Disabled in the Service Parameter Configurationwindow.

Opus

Unified Communications Manager GroupsDesignature backup Cisco Unified Communications Managers in your system. They handle call processingfor a node in your system that experiences an outage or failure.

A Cisco Unified Communications Manager group is a prioritized list of up to three nodes. Each group mustcontain a primary node, and the group can contain one or two backup nodes. The order in which you list thenodes in a group determines their priority.

Cisco Unified CommunicationsManager groups provide both call-processing redundancy and distributed callprocessing. How you distribute devices, device pools, and the nodes among the groups determines the levelof redundancy and load balancing in your system. In most cases, you must distribute the devices to preventthe other nodes from becoming overloaded if one of the nodes in the group fails.


Configure Core Settings for Device PoolsUnified Communications Manager Groups

Device PoolsUse a device pool to group together device-specific settings. After you create a device pool, you can associatedevices so that they inherit the device pool settings, rather than configuring each device individually.

Add new device pools based on what you want to do with them. For example, you can use device pools thatis configured with server load balancing or physical location in mind.

This section covers the steps to configure a basic device pool. As you configure further functions in yoursystem, you can return to the device pool or pools that you added and update them with the settings that youyou want to apply.

Core Settings for Device Pools PrerequisitesTo ensure that Cisco Unified Communications Manager includes the latest time zone information, you caninstall a Cisco Options Package (COP) file that updates the time zone information after you install CiscoUnified CommunicationsManager. After major time zone change events, we will contact you to let you knowthat you can download latest COP file at https://software.cisco.com/download/navigator.html.

Change the settings for CMLocal to your local date and time.

Core Settings for Device Pools Task FlowProcedure

PurposeCommand or Action

Configure phone network time protocol (NTP) references to ensurethat an IP phone that is running SIP gets its date and time informationfrom an NTP server.

After you create an NTP reference you must add thereference to a date/time group. In the date/time group, youprioritize the phone NTP references, starting with the firstserver that you want the phone to contact.

Note

Add a Phone NTPReference, on page 5

Step 1

Define time zones for the various devices that are connected to yoursystem. After adding a new date/time group to the database, you can

Add a Date/Time Group, onpage 6

Step 2

assign it to a device pool to configure the date and time informationfor that device pool.

Limit the bandwidth for individual calls that are sent across a WANlink while allowing you to use a higher bandwidth for internal calls.

You do not need to configure regions if you are using onlythe default G.711 audio codec.

Tip

Add Region, on page 6Step 3

Configure a Cisco Unified CommunicationsManager Group to grouptogether three nodes that devices can use for registration, callprocessing, and redundancy in the event of an outage.

Configure Cisco UnifiedCommunications ManagerGroups, on page 7

Step 4


Configure Core Settings for Device PoolsDevice Pools

https://software.cisco.com/download/navigator.html

PurposeCommand or Action

Configure device pools to contain common settings that can beassigned to devices, rather than defining the same settings each time

Configure a Basic DevicePool, on page 8

Step 5

you add a device. Start with a basic device pool to configure UnifiedCommunications Managers, date/time information, and the codecsthat the associated devices will use.

Add a Phone NTP ReferenceConfigure phone network time protocol (NTP) references to ensure that an IP phone that is running SIP getsits date and time information from an NTP server.

After you create an NTP reference you must add the reference to a date/time group. In the date/time group,you prioritize the phone NTP references, starting with the first server that you want the phone to contact.

Note

Cisco Unified CommunicationsManager does not support the multicast and anycast modes. If you chooseeither of these modes, your system will default to the directed broadcast mode.

Note

Before You Begin

Procedure

Step 1 From Cisco Unified CM Administration, choose System > Phone NTP Reference.Step 2 Click Add New.Step 3 In the IP Address field, enter the IP Address of the NTP server that you want the phone that is running SIP

to use to get its date and time.Step 4 In the Description field, enter a description for the phone NTP reference.Step 5 From theMode drop-down list, choose the mode for the phone NTP reference from the following list of

options:

• Unicast—If you choose this mode, the phone will send an NTP query packet to that particular NTPserver.

• Directed Broadcast—If you choose this default NTP mode, the phone accesses date/time informationfrom any NTP server but gives the listed NTP servers (1st = primary, 2nd = secondary) priority.

Step 6 Click Save.


Configure Core Settings for Device PoolsAdd a Phone NTP Reference

What to Do Next

Add a Date/Time Group, on page 6

Add a Date/Time GroupDefine time zones for the various devices that are connected to your system. After adding a new date/timegroup to the database, you can assign it to a device pool to configure the date and time information for thatdevice pool.

You must reset devices to apply any changes that you make.

For a worldwide distribution of Cisco Unified IP Phones, create a date/time group for each of the 24 timezones.

Tip

Before You Begin

Add a Phone NTP Reference, on page 5

Procedure

Step 1 From Cisco Unified CM Administration, choose System > Date/Time Group.Step 2 Click Add New.Step 3 Configure the fields on theDate/TimeGroupConfigurationwindow. See the online help for more information

about the fields and their configuration options.Step 4 Click Save.

What to Do Next

Add Region, on page 6

Add RegionLimit the bandwidth for individual calls that are sent across a WAN link while allowing you to use a higherbandwidth for internal calls.

You do not need to configure regions if you are using only the default G.711 audio codec.Tip

For enhanced scalability and to ensure that the system uses fewer resources, we recommend that you set thedefault values in the Service Parameters Configuration window for the maximum bit rates for audio andvideo calls and the link loss type; then, when you configure regions, choose the default settings in theRegionConfiguration window.

Before You Begin

Add a Date/Time Group, on page 6


Configure Core Settings for Device PoolsAdd a Date/Time Group

Procedure

Step 1 From Cisco Unified CM Administration, choose SystemService Parameters.Step 2 Choose the node.Step 3 Choose the Cisco CallManager service.Step 4 Scroll to the Clusterwide Parameters (System-Location and Region) pane.Step 5 Create regions specifying the maximum bit rates to use for calls within those regions and between other

regions.

• For audio calls, the default value within a region is 64 kb/s (which means that G.722 or G.711 may beused for the call, with G.722 being preferred because it has better audio quality).

• For audio calls, the default value between regions is 8 kb/s (G.729).

• For video calls (includes audio), the default value 384 kb/s.

Cisco Unified Communications Manager allows you to add a maximum of 2000 regions. You mustspecify the maximum bit rate for devices that are using regions.

Note

Step 6 Click Save

What to Do Next

Configure Cisco Unified Communications Manager Groups, on page 7

Configure Cisco Unified Communications Manager GroupsConfigure a Cisco Unified Communications Manager Group to group together three nodes that devices canuse for registration, call processing, and redundancy in the event of an outage.

Do not use the default server group, because it is not descriptive and can cause confusion.Note

Procedure

Step 1 From Cisco Unified CM Administration, choose System > Cisco Unified CM Group.Step 2 In the Name field, enter a name.

Consider identifying the order of the nodes in the name so that you can easily distinguish the group fromothers, for example, CUCM_PUB-SUB.

Step 3 From the Available Cisco Unified Communications Managers list, choose the node that you want to addto this group.

Step 4 Click the down arrow to move the node to the Selected Cisco Unified Communications Managers list.Step 5 Add any other nodes to this group as needed.Step 6 Click Save.


Configure Core Settings for Device PoolsConfigure Cisco Unified Communications Manager Groups

What to Do Next

Configure a Basic Device Pool, on page 8

Configure a Basic Device PoolConfigure device pools to contain common settings that can be assigned to devices, rather than defining thesame settings each time you add a device. Start with a basic device pool to configure Unified CommunicationsManagers, date/time information, and the codecs that the associated devices will use.

Do not use the default device pool, because it is not descriptive and can cause confusion.Note

Before You Begin

• Configure Cisco Unified Communications Manager Groups, on page 7

• Add a Date/Time Group, on page 6

• Add Region, on page 6

Procedure

Step 1 From Cisco Unified CM Administration, choose System > Device Pool.Step 2 Click Add New.Step 3 Configure the fields on the Device Pool Configuration window. See the Related Topics section for more

information about the fields and their configuration options.Step 4 Click Save.

Related Topics

Basic Device Pool Configuration Fields, on page 8

Basic Device Pool Configuration Fields

Table 1: Basic Device Pool Configuration Fields

DescriptionField

Enter the name of the new device pool. You can enter up to 50characters, which include alphanumeric characters, periods (.),hyphens (-), underscores (_), and blank spaces.

Device Pool Name


Configure Core Settings for Device PoolsConfigure a Basic Device Pool

DescriptionField

Choose the Cisco Unified Communications Manager group toassign to devices in this device pool. A Cisco UnifiedCommunications Manager group specifies a prioritized list ofup to three Cisco Unified Communications Manager nodes.The first node in the list serves as the primary node for thatgroup, and the other members of the group serve as backupnodes for redundancy.

Cisco Unified Communications ManagerGroup

Choose the date/time group to assign to devices in this devicepool. The date/time group specifies the time zone and thedisplay formats for date and time.

Date/Time Group

Choose the region to assign to devices in this device pool. Theregion settings specify voice and video codecs that can be usedfor communications within a region and between other regions.

Region



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