3Com VCX V7122 User Manual page 55

Note: When a release reason that is defined in the 'Reasons for Alternative IP to Tel
Routing' table is received for a specific IP Tel call, an alternative trunk group for that call is
available. To associate an alternative trunk group to an incoming IP call, assign it with an
additional entry in the 'IP to Trunk Group Routing' table (repeat the same routing rules with a
different trunk group ID). For detailed information on the 'Reasons for Alternative Routing
Tables' see Reasons for Alternative Routing
To use trunk groups you must also do the following:
You must assign a trunk group ID to the VoIP gateway E1/T1 B-channels on the Trunk
Group Table. For information on how to assign a trunk group ID to a B-channel, see
Configuring the Trunk Group Table
You can configure the Trunk Group Settings table to determine the method in which new
calls are assigned to channels within the trunk groups (a different method for each trunk
group can be configured). For information on how to enable this option, see
the Trunk Group Settings
group isn't specified, then the global 'Channel Select Mode' parameter (defined in
'General Parameters' screen under 'Advanced Parameters') applies.
To configure the IP to Trunk Group Routing table, follow these steps:
1
Open the 'IP to Trunk Group Routing' screen (Protocol Management menu > Routing
Tables submenu > IP to Trunk Group Routing option); the 'IP to Trunk Group Routing'
table screen is displayed.
Figure 21
IP to Trunk Group Routing Table
2
In the 'IP to Tel Routing Mode' field, select the IP to Tel routing mode (see
page 119).
3
In the 'Routing Index' drop-down list, select the range of entries that you want to edit (up
to 24 entries can be configured).
4 Configure the IP to Trunk Group Routing table according to
5
Click the Submit button to save your changes.
6 To save the changes so they are available after a power fail, see
page 88.
3Com VCX V7122 SIP VoIP Gateway User Manual
on page 57.
on page 62.
on page 63. If a Channel Select Mode for a specific trunk
Configuring
Table 28
Table 18.
Save Configuration
on
on
55