3Com VCX V7111 User Manual page 90

To configure the coder group settings, follow these steps:
1 Open the 'Coder Group Settings' screen (Protocol Management menu > Profile
Definitions submenu > Coder Group Settings option); the 'Coder Group Settings'
screen is displayed.
Figure 38 Coder Group Settings Screen
2
In the 'Coder Group ID' drop-down list, select the coder group you want to edit (up to four
coder groups can be configured).
3
From the coder drop-down list, select the coder you want to use. For the full list of
available coders and their corresponding ptimes see
Note: Each coder can appear only once.
4 From the drop-down list to the right of the coder list, select the size of the Voice Packet
(ptime) used with this coder in milliseconds. Selecting the size of the packet determines
how many coder payloads are combined into one RTP (voice) packet.
Note 1: The ptime packetization period depends on the selected coder name.
Note 2: If not specified, the ptime gets a default value.
Note 3: The ptime specifies the maximum packetization time the gateway can receive.
5
Repeat steps 3 and 4 for the second to fifth coders (optional).
6 Repeat steps 2 to 5 for the second to forth coder groups (optional).
7
Click the Submit button to save your changes.
8
To save the changes so they are available after a power fail see
page 145.
In the current version, only the ptime of the first coder is sent in the SDP section of the Invite
message.
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Table 28.
3Com VCX V7111 VoIP SIP Gateway User Manual
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