Mediant 2000 SIPMediant 2000 SIP User’s Manual 160 Document #: LTRT-72504Note: 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 bedetermined via the Tel to IP Routing table.To enable different domain names add the following parameters to the ini file:AlwaysUseRouteTable = 1IsProxyUsed = 1AddTrunkGroupAsPrefix = 1NumberMapTel2IP = *, 1The parameter ‘AddTrunkGroupAsPrefix’ is set to differentiate incoming calls, based on the trunkfrom 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 adifferent domain name. Finally, ‘NumberMapTel2IP’ is set to remove the leftmost digit from anycalled number (the previously added trunk group ID).For example:TrunkGroup_1 = 0/1-24TrunkGroup_2 = 1/1-24TrunkGroup_3 = 2/1-24Prefix = 1, example1.domainPrefix = 2, example2.domainPrefix = 3, example3.domainIn the example above, all calls that are originated in trunk 1 (associated with trunk group number1) are sent to example1.domain. An incoming ISDN call, from trunk number 1, with called number1234000, generates the following SIP message:INVITE sip:1234000@example1.domain;norteltrkgrp=1;8.13.1.3 Support for RPI HeaderSupport for Remote Party ID (RPI) header containing proprietary RPI-TON, RPI-NPI, privacy andscreening parameters (EnableRPIHeader = 1).Configuration of NPI/TONConfiguration of the calling number’s NPI/TON values for outgoing IPÆISDN calls. If the callingnumber’s NPI/TON values aren’t provided in the Remote-Party-ID (RPID) header (received withthe INVITE message) and are also not configured in the source number IP to Tel Manipulationtable, 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 Numbermanipulation rules. If both are defined, the latter takes precedence over the former.¾ To configure a specific called number NPI/TON according to domainname and trunk group, take these 2 steps:1. Define RemovePrefix = 0, forcing the called number to include, as prefix, the Domain nameand Trunk Group (this prefix can be used to define specific NPI/TON values), for example:nortelnetworks.com/TrunkGroup32145551234
