3Com VCX V7122, User Manual, Page: 75 / 488

V7122 Gateway User Guide
75
Protocol Definition Parameters
Use this submenu to configure the following gateway’s specific SIP protocol parameters:
ƒ General Parameters
ƒ Proxy & Registration Parameters
ƒ Coders (see Coders )
ƒ
DTMF & Dialing Parameters
Coders
From the Coders screen you can configure 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 gateway’s coders:
1
Open the ‘Coders’ screen ( Protocol Management menu > Protocol Definition
submenu > Coders option); the ‘Coders’ screen is displayed.
Figure 25
Coders Screen
2
From the Coder Name drop-down list, select the coder you want to use. For the full list of
available coders and their corresponding attributes, see the
ini file parameter
‘CoderName’ (described in Table 41 ).
Each coder can appear only once.
3
From the Packetization Time drop-down list, select the packetization time (in msec) for
the coder you selected. The packetization time determines how many coder payloads
are combined into a single RTP packet.