User's Manual

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 gateway is important (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 select a 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.

To access local PSTN resources, outgoing calls can be 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, 6 343-5555). 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 for SRG 50

NN43001-307 02.02 Standard

Release 5.0 3 December 2007