Nortel BCM 3.7, Manual

Page: 319 / 1004

Determining line access dialing 319
Programming Operations Guide
Determining line access dialing
The next two sections, “Understanding access codes” on page 320 and “Configuring call routing”
on page 331 describe what you do with the lines and loops you previously set up into line pools.
By using access codes or call routing, which uses destination codes, you can determine which lines
(routes) outgoing calls use. When you create a route, you can also specify restrictions that apply to
how or when the line will be used.
The following figure provides an overview of how access codes and routing is used within the
system to direct calls from a telephone in one system to a telephone in another system.
Figure 91 Line management diagram
PSTN
Long Distance
PSTN
Private Network
E&M, T1,
MCDN, PRI
tandem, VoIP
Extension 2246
Intercom
dialing (2280)
Normal
Access Code
Call (5-2280)
LD call
(1-403-2280)
Normal routing call
(9-409-2290)
Other routing call
(91-409-2290)
Other Access Code call
(6-2290)
Line pools
Extension 2280
Access Codes Routing (destination) Codes Access Codes