Nortel Networks SRG 50 NN43001-307 - Manual (Page 81)

Dialing plan examples 81
For more information on configuring the main office and NRS, see Branch
Office Installation and Commissioning (NN43001-314) and IP Peer
Networking Installation and Commissioning (NN43001-313). For more
information on configuring the SRG, see SRG50 Configuration Guide
(NN40140-500).
Option 3
DNs of SRG IP Phones and DNs in the main office overlap in Normal
Mode, but are unique in Local Mode
In this CDP configuration, each node on the network has unique leading
digits that is included in the DN range. The unique leading digits indicate
the private network code for the system.
This configuration allows seamless dialing for users registered at the SRG,
but main office users must dial a different DN to call SRG IP Phones in
Normal and Local mode. Therefore, SRG IP Phones have DNs and BUIDS
that do not match.
In Figure 23 "CDP Option 3 " (page 82) , the SRG IP Phones have a DN
starting with 4 on the SRG to accommodate the SRG Private Network Code.
On the main office, the SRG IP Phones are given a DN (BUID) starting
with 3, the main office Private Network Code. The NRS is programmed
to recognize that 3X numbers go to the main office and that 4X numbers
go to the SRG.
In Normal mode, when a call is directed into the SRG, or from a telephone
registered at the SRG, to the SRG IP Phone in Normal mode, the SRG
system translates the SRG IP telephone DN (4XXX) to the main office BUID
(3XXX) so that the call can route correctly through the main office VoIP
trunk. Users registered at the main office dial the main office DN (3XXX) for
the SRG IP Phone.
In Local mode, the users registered to the SRG still dial the SRG IP Phone
DN (4XXX). The main office users can not call the SRG IP Phone by dialing
the main office DN for the telephone (3XXX) because the NRS cannot route
the call to the SRG. If the main office user dials the SRG IP Phone DN
(4XXX), the call goes through.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright © 2005-2007, Nortel Networks
.