BCM 400 fallback using SIP trunks

[motleyhawk]

Cannot get fallback to PRI when all SIP trunks are busy, get no free lines, but when you unplug from the network it will fallback to the PSTN just fine. Fallback to circuit switched is enabled for all. This is a BCM 400 4.0. Schedules are turned on and working because when the network goes down it falls back correctly

Any ideas?

 

[acewarlock]

I though Fallback was for when the curcuit went down, not for call overflow.




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[Deweyhumbolt]

It can do both. It will fallback to Normal Route, but it will overflow to Secondary Route.

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[DBrewsky]

When overflowing from any IP trunk, you can only use the first selection then overflow to Normal. Make sure you have QOS enabled in order to overflow.. Another gotcha from Nortel...

 

[motleyhawk]

Got the fix. When the network is down you need to have fallback to circuit switch enabled all, when you have congestion on the SIP trunks overflow needs to be checked on the schedule, do not put a secondary route in, it will overflow or fallback to the normal route.

Thanks for all the help