Avaya Business Communications Manager 5.0 - Planning and Engineering User Manual Page 195

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VoIP trunk gateways 195
Nortel Business Communications Manager 5.0
Planning and Engineering
NN40170-200 01.03 Standard
August 2009
Copyright © 2009 Nortel Networks
Figure 41 BCM systems with a gatekeeper
This example explains how a call from DN 321 in Ottawa would be made to
DN 421 in Santa Clara. It assumes that call signaling is set to Gatekeeper
Resolved and no pre-granted AdmissionRequest (ARQ) has been issued:
1 BCM Ottawa sends an ARQ to the gatekeeper for DN 421.
2 The gatekeeper resolves DN 421 to 10.10.10.17.
3 BCM Ottawa sends the call Setup message for DN 421 to the gatekeeper
(10.10.10.17), which forwards it to the gateway at 10.10.10.19.
4 The call is established.
Faxing over VoIP trunks: You can assign VoIP trunks to wired fax
machines if you have T.38 fax enabled on the local gateway. The BCM
supports this IP fax feature between BCMs, BCM200/400/1000 running
BCM 3.5 and subsequent up-level versions of software, and a Meridian 1
running IPT 3.0 (or newer) software, or a CS 1000/M.
The system processes fax signals by initiating a voice call over the VoIP
line. When the T.38 fax packets are received at the remote gateway, the
receiving system establishes a new path that uses the T.38 protocol. Both
the endpoints must be running a software version that supports the T.38
fax.
gatekeeper
IP:10.10.10.17
IP:10:10:10:18
IP:10:10:10:19
IP:10:10:10:20
DN 521
DN 421
DN 321
IP network
BCM450 Santa Clara
BCM450 Ottawa
BCM450 Calgary
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