3Com V7122 User Manual page 93

For each group you can define the first to fifth preferred coders (and their attributes) for the
gateway. The first coder is the highest priority coder and is used by the gateway whenever
possible. If the far end gateway cannot use the coder assigned as the first coder, the
gateway attempts to use the next coder and so forth.
To configure the coder group settings:
Open the 'Coder Group Settings' screen (Protocol Management menu > Profile
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Definitions submenu > Coder Group Settings option); the 'Coder Group Settings'
screen is displayed.
Coder Group Settings Screen
Figure 34
From the Coder Group ID drop-down list, select the coder group you want to edit (up to
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four coder groups can be configured).
From the Coder Name drop-down list, select the coder you want to use. For the full list of
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available coders and their corresponding attributes, see the ini file parameter
'CoderName_ID' (described in
Each coder can appear only once.
From the Packetization Time drop-down list, select the packetization time (in msec) for
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the coder you selected. The packetization time determines how many coder payloads
are combined into a single RTP packet.
If not specified, the ptime gets a default value.
The ptime specifies the packetization time the gateway expects to receive. The
gateway always uses the ptime requested by the remote side for sending RTP
packets.
From the Rate drop-down list, select the bit rate (in kbps) for the coder you selected.
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V7122 Gateway User Guide
Table 41).
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