Nortel 1000 Configuration Manual page 44

44 Dialing Plan configuration
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Nortel recommends that the SRG use CDP.
CDP Terminal Numbers (TN) can be activated on the other systems if the
user moves and wants to retain their phone number. SRG does not support
Transferable Directory Numbers (TNDN) due to differences in dialing plans
and the small range of DN available on the SRG.
For specific examples for CDP and UDP dialing plans, see
examples" (page
Once the call is sent over the IP network, the call is routed to the SRG,
which uses the NRS (H.323 Gatekeeper/SIP Redirect Server) to route the
call. The NRS (H.323 Gatekeeper/SIP Redirect Server) translates the
address form a telephone number to an IP address, and authorizes the call.
Specific dialing plan configuration is required for IP Phones to properly
select a main office or a branch office that provides access to the PSTN for
the originating IP Phone. A common configuration might be:
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However, this configuration represents only one way that the dialing plan
could be configured. PSTN calls can be routed according to the point of
origin (main office or branch office) and/or the desired destination, and
can select trunks at the main office, branch office, or other branch offices
as required. Therefore, the user can route calls to gateways that minimize
long-distance costs, minimize bandwidth usage, or meet other criteria.
Nortel recommends that customers use Coordinated Dialing Plan (CDP)
between the main office and its branch offices since it enables all users,
at the main office or the branch office, to call each other using just an
extension number. CDP enables consistent dialing between the main office
and SRG IP Phones and devices.
For more information, see Dialing Plans Reference (NN43001-283).
Copyright © 2005-2007, Nortel Networks
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Uniform Dialing Plan (UDP) – Location code is added to the DN for
the BUID
65).
SRG users select the SRG PSTN for local calls.
Main office users select the main office PSTN for local calls.
All users select either the main office or SRG PSTN for long-distance
calls to minimize toll charges.
calls configured to minimize toll charges.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
ATTENTION
"Dialing plan