- Nortel IP Phone Mobile Communication Integration Guide

Universal Extensions 19

Configure the mobile prefix on the MCG 3100 gateway configuration tab as

the incoming prefix for call termination. Configure the Service DN field on

the MCG 3100 gateway configuration with the service DN.

Universal Extensions

A CS 1000 Universal Extension (UEXT) represents each mobile client

instance.

The Primary DN of the UEXT determines the user’s published addresses:

both private electronic serial number (ESN) and public direct inward dialing

DID (for example, Primary DN: 5335 contributes to the ESN address

3435335 and DID address +16139675335).

The mobile prefix is a prefix to all mobile user identities on the UEXT

target DN. The mobile prefix provides a digit sequence that is unique

within the SIP domain to identify a mobile client that does not conflict with

the existing dial plan and routing configuration for their CDP and UDP

numbers.

The Target DN of the UEXT extends the user’s incoming calls to mobile

clients that are accessible through SIP domain. A typical setup would be

AC1 + (mobile prefix) + the user’s ESN number (for example, Target DN:

65553435335).

Attention: It can be necessary to increase the Forward No Answer

(FNA) timeout for mobile client users. The UEXT extends all calls to the

MCG 3100. The MCG 3100 then presents the incoming call to the MCC

3100 clients over the cellular data channel of the MCC 3100 (using HTTP

or /HTTPS). It can take a few seconds for the data transmission to reach

the client depending on the current state of the mobile phone. If the FNA

timeout is too short users do not have reasonable time to (potentially log

on) and answer the call before the call server invokes FNA and sends the

call to the FNA destination.

Caller ID table

All CS 1000 telephones use the Caller ID table. The Caller ID table is

required for the MCC 3100 to correctly build the Caller ID (CLID) for both

Private network and Public network calls from a number or extension.

Outgoing SIP calls from the MCG 3100 on behalf of the mobile client

use the CLID table configured against the Multiple Appearance Directory

Number Redirection Prime (MARP) TN in the Multiple Access Directory

Number (MADN) group of the MCC 3100 user.

Nortel Mobile Communication 3100

Mobile Communication 3100 and Communication Server 1000 Solution Integration Guide

NN49000-315 02.01 2 October 2009