Nortel Networks Mediant TP-1610 SIP - Manual (Page 160)

Mediant 2000 SIP
Mediant 2000 SIP User’s Manual 160 Document #: LTRT-72504
Note: Usually each E1/T1 span is configured as a separate trunk group.
Different Domain names, according to the originated trunk group (or E1/T1 spans), can be
determined via the Tel to IP Routing table.
To enable different domain names add the following parameters to the ini file:
AlwaysUseRouteTable = 1
IsProxyUsed = 1
AddTrunkGroupAsPrefix = 1
NumberMapTel2IP = *, 1
The parameter ‘AddTrunkGroupAsPrefix’ is set to differentiate incoming calls, based on the trunk
from where the call arrived (it is assumed that each trunk group is composed of a single trunk)
and use the Tel to IP Routing table or the Prefix parameter in the ini file to link each trunk to a
different domain name. Finally, ‘NumberMapTel2IP’ is set to remove the leftmost digit from any
called number (the previously added trunk group ID).
For example:
TrunkGroup_1 = 0/1-24
TrunkGroup_2 = 1/1-24
TrunkGroup_3 = 2/1-24
Prefix = 1, example1.domain
Prefix = 2, example2.domain
Prefix = 3, example3.domain
In the example above, all calls that are originated in trunk 1 (associated with trunk group number
1) are sent to example1.domain. An incoming ISDN call, from trunk number 1, with called number
1234000, generates the following SIP message:
INVITE sip:[email protected];norteltrkgrp=1;
8.13.1.3 Support for RPI Header
Support for Remote Party ID (RPI) header containing proprietary RPI-TON, RPI-NPI, privacy and
screening parameters (EnableRPIHeader = 1).
Configuration of NPI/TON
Configuration of the calling number’s NPI/TON values for outgoing IP ISDN calls. If the calling
number’s NPI/TON values aren’t provided in the Remote-Party-ID (RPID) header (received with
the INVITE message) and are also not configured in the source number IP to Tel Manipulation
table, then the calling number NPI/TON is set equal to the called number’s NPI/TON.
NPI/TON values for the called number are defined in the RPID header or set by Number
manipulation rules. If both are defined, the latter takes precedence over the former.
To configure a specific called number NPI/TON according to domain
name and trunk group, take these 2 steps:
1. Define RemovePrefix = 0, forcing the called number to include, as prefix, the Domain name
and Trunk Group (this prefix can be used to define specific NPI/TON values), for example:
nortelnetworks.com/TrunkGroup3 2145551234