AT&T IP Flexible Reach Service
Nortel BCM50 Release 3.0 SIP Configuration Guide
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 Æ Telephony Æ Lines Æ 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 Æ Resources Æ Telephony Resources Æ IP trunks.
Note: 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
Customers that desire a lower cost or have no requirements for H.323 should choose the SIP Gateway Trunk License option.
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 AT&T IP Flex Reach 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 ÆTelephony Æ Lines Æ 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.
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