Avaya Business Communications Manager 5.0 - Planning and Engineering User Manual Page 137

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Nortel Business Communications Manager 5.0
Planning and Engineering
NN40170-200 01.03 Standard
August 2009
Copyright © 2009 Nortel Networks
Private networking—PRI and VoIP
tandem network
This section gives an overview of PRI and VoIP tandem network.You can use
PRI trunks and VoIP trunks to create a private network between other BCMs.
PRI and VoIP tandem configurations
The following figure demonstrates a tandem configuration.
Figure 29 Private tandem network of BCMs
Routing for tandem networks
In this type of network, each Business system node is set up to route calls
internally as well as to other nodes on the system. Each node must have a
unique identification number, which is determined by the type of dialing plan
chosen for the network.
VoIP trunks require local gateway configuration and either remote gateway or
Gatekeeper configurations that identify the other nodes in the network.
If the node is also connected to the public network, the usual routing is
required for that connection.
PRI or VoIP line
PRI or VoIP line
PRI or VoIP line
Calgary Ottawa
Local
PSTN
Local
PSTN
Node A
Node B
Node C
Public: 403-761-
XXXX
Calgary network routes only
area codes 403 and 604
Public: 613-763-
XXXX
Ottawa network routes all area
codes except 403 and 604
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