3Com VCX v7111 User Manual page 129

10 Click Submit to save your changes.
11 To save the changes so they are available after a power fail, see
Each coder can appear only once.
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.
If payload type is not specified, a default is used.
For G.729 it is also possible to select silence suppression without adaptations
Only the ptime of the first coder in the defined coder list is declared in INVITE / 200 OK SDP,
even if multiple coders are defined.
If coder G.729 is selected and silence suppression disabled, the gateway includes the string
'annexb=no' in the SDP of the relevant SIP messages. If silence suppression is enabled or set
to 'Enable w/o Adaptations', 'annexb=yes' is included.
ini File Coder Group Parameter
Table 36
Parameter
CoderName_ID
Tel Profile Settings
Use the Tel Profile Settings screen to define up to four different Tel Profiles. These Profiles
are used in the Endpoint Phone Number table to associate different Profiles to gateways
endpoints, thereby applying different behavior to different V7111 ports.
To configure the Tel Profile settings:
Open the Tel Profile Settings screen (Protocol Management menu > Profile Definitions
1
submenu > Tel Profile Settings option); the Tel Profile Settings screen is displayed.
®
3Com VCX V7111 VoIP Gateway User Guide
Description
Defines groups of coders that can be associated with IP or Tel profiles (up to
five coders in each group).
Enter coder groups in the following format:
CoderName_<coder group ID from 1 to 4>=<Coder
Name>,<Ptime>,<Rate>,<Payload Type>,<Silence Suppression Mode>.
This parameter (CoderName_ID) can appear up to 20 times (five
coders in four coder groups).
The coder name is case-sensitive.
If silence suppression is not defined (for a specific coder), the value
defined by the parameter EnableSilenceCompression is used.
The value of several fields is hard-coded according to well-known
standards (for example, the payload type of G.711 U-law is always 0).
Other values can be set dynamically. If no value is specified for a
dynamic field, a default value is assigned. If a value is specified for a
hard-coded field, the value is ignored.
For example:
CoderName_1 = g711Alaw64k,20,,,0
CoderName_1 = g711Ulaw64k,40
CoderName_1 = g7231,90,1,,1
CoderName_2 = g726,$$,2,,0
Saving Configuration.
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