Nortel Networks NN43001-121 manual Call Server configuration, Configuring the Codec

Telephony Gateway and Services configuration 151

Call Server configuration

CS 1000 configuration involves two separate functions: Signaling Server configuration and Call Server Configuration. All of the Signaling Server configuration is performed in Element Manager. Most of the Call Server configuration can also be done in Element Manager, although some can be done at the Call Server prompt. This document assumes that you are already familiar with how to configure a CS 1000.

In ESN networks, you must configure the correct HLOC in both LD 90 (required for ESN calls to work) and LD 15. If not, basic calling functionality does not work. Also, the Caller ID table, Home NPA, and LOC are required for outgoing calls to the Public network (PSTN) to correctly display the outgoing Caller Line ID (CLID) in North America.

Package 408 is required for both Telephony Gateway and Services and Remote Call Control. Phones need not be configured as "AST," or have "T87A" enabled as a class of service; however, Package 408 must be added in order for Telephony Gateway and Services to work properly.

Configuring the Codec

The Mediation Server supports the G.711 (20 milliseconds) codec. The G.711 codec must be enforced in the network by defining only the G.711 codec on the CS 1000. If G.711 is not the only codec used, calls to voice mail (such as CallPilot) or call conferencing bridges (such as MCS MeetMe) do not work. The only codec supported for the short leg of a call (Mediation Server to Call Server) is G.711 and for the long leg (Mediation Server to Office Communications Server is RT audio.

Other codecs cannot be configured on the CS 1000, as Office Communicator calls that tandem through the CS 1000 to other endpoints cannot be allowed to select a codec other than G.711.

The codec is configured as described in IP Peer Networking Installation and Commissioning (NN43001-313). Figure 52 "Codec configuration" (page

152)demonstrates the correct location of Element Manager in which to configure the codec.

Nortel Communication Server 1000

Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007

NN43001-121 01.03 Standard

Release 5.0 30 April 2008

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