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V6100 and V7122 User Guide
97
IP to Trunk Group Routing Table
The IP to Trunk Group Routing Table is used to route incoming IP calls to groups of E1/T1
B-channels called trunk groups. Calls are assigned to trunk groups according to any
combination of the following three options (or using each independently):
Destination phone prefix
Source phone prefix
Source IP address
The call is then sent to the VoIP gateway channels assigned to that trunk group. The specific
channel, within a trunk group, that is assigned to accept the call is determined according to
the trunk group’s channel selection mode which is defined in the Trunk Group Settings table
(See
Configuring the Trunk Group Settings
), or according to the global parameter
‘ChannelSelectMode’ (see
Table 51
).
When a release reason that is defined in the ‘Reasons for Alternative IP to Tel
Routing’ table is received for a specific IP
Æ
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
Configuring
the Trunk Group Settings
. If a Channel Select Mode for a specific trunk 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:
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.
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