Private Networking: Pri And Voip Tandem Networks; Routing For Tandem Networks - Nortel BCM50 Configuration Manual

Chapter 35

Private networking: PRI and VoIP tandem networks

You can use PRI trunks and VoIP trunks to create a private network between other BCMs. This
tandem network provides you with the benefits of end-to-end name display and toll-free calling
over the PRI or VoIP private link. Each BCM becomes a node in the network.
Refer to the following information about tandem networks:
• "Routing for tandem networks" on page 323
• "Routing calls through a tandem network" on page 324
• "Using VoIP to tandem systems" on page 327
Figure 101 demonstrates a tandem configuration.
Figure 101 Private tandem network of BCMs
Calgary network routes only
area codes 403 and 604
Local
PSTN
Calgary
Public:
403-761-XXXX
PRI or VoIP line
Also refer to "Using VoIP to tandem systems" on page 327
using VoIP trunks.

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.
Ottawa network routes all area
codes except 403 and 604
PRI or VoIP line
Node A Node C
Node B
Ottawa
Public:
613-763-XXXX
PRI or VoIP line
for other examples of tandem systems
Networking Configuration Guide
323
Local
PSTN