Branch office dialing plan 27
Branch office dialing plan
Since IP Phone users can be located at a branch office equipped with an
SRG, the routing of calls to the local gatewayis impor tant (especially when
toll charges apply to calls made from the central Call Server that controls
the telephone). The administrator can configure digit manipulation through
zone attributes for IP Phones to selecta main office or branch office that
provides PSTN access local to the destination of the call.
Calls from the PSTN to users within the network can be routed with the
various ESN numbering plan configurations.
Toaccess local PSTN resources, outgoing calls canbe routed using ESN
as well as zone parameters that enable digit insertion. The zone parameters
force calls made by an SRG user to be routed to the desired local PSTN
facilities.
ATTENTION
Outgoing calls can include local and, optionally,long distance calls.
Nortel recommends that the Branch User ID (BUID) be the same at the
branch office as the DN at the main office. A BUID has a maximum of 15
digits. Under the recommended Coordinated Dialing Plan (CDP), the BUID
can be an extension (for example,4567). Under the Uniform Dialing Plan
(UDP), the BUID is the user main office DN, the Location Code (LOC), plus
the Access Code (for example, 6343-5555). The main office DN must be
an ESN compliant DN. See "ESN Access Codes" (page 27).
The SRG only supports only one dialing plan option at a time. CDP and
UDP dialing plan options cannot be configured at the same time in the
same system.
For more information about dialing plans and configuration, see "Dialing
Plan configuration" (page 43). For more information about the branch
office dialing plan, see CS 1000 Main Office Configuration for SRG50
(NN43001-307).

ESN Access Codes

ESN data is configured with two Access Codes, called AC1 and AC2.
AC1 normally applies to long distance calls, whether placed on or off the
customer’s private network (for example,dialing 6). AC2 normally applies to
local calls (for example, 9). For more information, see Electronic Switched
Network Reference—Signaling and Transmission(NN43001-280).
Nortel Communication Server 1000
Main Office Configuration Guide forSRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright© 2005-2007, Nor tel Networks
.