Avaya Business Communications Manager 5.0 - Planning and Engineering User Manual Page 63

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Dialing plan set-up 63
Nortel Business Communications Manager 5.0
Planning and Engineering
NN40170-200 01.03 Standard
August 2009
Copyright © 2009 Nortel Networks
external code
direct dial digit
private access code
Public/Private Auto DN
Public/Private DISA DN
line pool code/destination code
telephone DN
MCDN codes for tandem call configuration
Three special codes exist specifically for programming over PRI and VoIP
trunks that are using the MCDN protocol, and which connect to a call server
systems that use specific call codes for special call types, such as the
Meridian 1 (M1). The purpose of the codes is to allow easier programming of
the call server systems when calls are tandemed through a BCM to the local
PSTN.
Calls tandeming to the public network through the private network need to
retain their dialing protocol throughout the private network. This means that
the BCM node receives a call from an M1 node tagged as a local call and
recognizes the call intended for the public network, but also recognizes the
call that needs to maintain the local call tag until it gets to the BCM node that
is directly connected to the PSTN. This is accomplished by ensuring that the
destination code, which starts with this access code, passes the call on using
the route designated with the correct call type.
VoIP trunks for fallback feature
The following path indicates where to access setting VoIP trunks for fallback
in the Element Manager:
Element Manager: Configuration > Resources > Telephony Resources
> IP Trunks >H323 Settings tab
Call routing configuration
Call routing allows you to define how calls are routed by your BCM system.
Call routing decides what path an outgoing call takes using the digits that are
dialed. It is sometimes called Automatic Route Selection (ARS).
Call routing configuration
When you select an internal line and dial, the system checks the numbers you
enter against the routing tables. If the number you dial starts with a destination
code, the system uses the line pool and dials out digits specified by the route
assigned to that destination code, and then dials the rest of the number that
you dialed.
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