Application Note

FS; Reviewed:

SPOC 09/07/2010

Solution & Interoperability Test Lab Application Notes

8 of 44

11xx12xx-SM

5.2. IP Codec Set

This section describes the steps for administering an IP codec set, which is used in the IP

network region when Communication Manager communicates with the SIP telephones via

Session Manager.

Step Description

Enter the change ip-codec-set n command, where n is a number between 1 and 7,

inclusive. IP codec sets are used in Section 5.3 for configuring an IP network region to

specify which codec sets may be used within and between network regions. For the

compliance testing, G.722-64K, G.711MU, G.729A, and G.729AB were tested. If only

one codec should be used, then only specify the one that is to be used.

Note: for G.729 interoperability between Avaya 1100- and 1200-Series IP Deskphones

and Avaya 9600 Series SIP Telephones, the configuration file settings for all telephones

should match that in the IP codec set. For the sample configuration shown below, the

9600 SIP Telephone configuration file should include the line: SET ENABLE_G729 “2”,

and the 1100- and 1200-Series IP Deskphone configuration files should include the line

“G729_ENABLE_ANNEXB YES”. See References [7, 8] and Section 7.2.

change ip-codec-set 1 Page 1 of 2

IP Codec Set

Codec Set: 1

Audio Silence Frames Packet

Codec Suppression Per Pkt Size(ms)

1: G.722-64K 2 20

2: G.711MU n 2 20

3: G.729AB n 2 20