AT&T IP Flexible Reach and AT&T IP Flexible Reach with AT&T Business in a Box
Nortel BCM50 Release 3.0 SIP Configuration Guide
*Nortel, Nortel Networks, Nortel (Logo), the Globemark, CS1000 are trademarks of Nortel Networks.
Issue 1.5 Page 14 of 38
4.2 IP Trunks
Voice over IP (VoIP) trunks, are signaling channels that simulate how CO lines
work. However, VoIP trunks transmit data to the IP network over a LAN or IP
network rather than over physical lines. Once the VoIP trunks are set up, you
can assign them to line pools, and program their behavior in the same way you
would PRI lines.
VoIP trunks use line numbers 001 to 012. These line records appear under
Configuration
Telephony
Lines
Active VoIP Lines
. To access VoIP
lines, you need to enter software keycodes. Each keycode supports a specific
number of trunks. No entries appear in the Enabled VoIP lines field until you
complete the IP Trunks Settings field, which displays when you click IP Trunks
under
Configuration
Resources
Telephony Resources
IP trunks
.
VoIP trunks should be configured to use a single line pool. Do not mix other
trunk types on the same line pool (e.g. analog, PRI, etc). The VoIP line pools are
assigned to routes, which, in turn, are configured with destination codes that
route calls to the BVoIP network.
You can also create a fallback for the trunk. This is a situation where the system
reroutes the call to a PSTN line pool if the primary route is not available or the
call quality is not suitable. If you do not configure your network for fallback and
the call quality is below threshold, the IP call fails.
Check under
Configuration
Telephony
Lines
Active VoIP Lines
to
see if trunks have been allocated. You should have a number of IP trunks
displayed. The total number of lines indicated corresponds to the number of IP
trunks licensed by Nortel for your BCM50. See figure below.
The BCM50 (Release 3.0) offers two VoIP trunk license options: SIP
Gateway Trunk License and VoIP Trunk Gateway License. The SIP Gateway
Trunk License enables SIP-only trunks and the VoIP Trunk Gateway License
enables SIP or H.323 trunks. Either type of trunk licenses can be used for SIP
signaling with AT&T IP Flexible Reach service.
Customers that desire a lower cost or have no requirements for H.323 should
choose the SIP Gateway Trunk License option.
(74 Seiten)
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