sip trunk down

[Fasalullatp]

Hi all,

We have a psenario having ccme conncted to remote end PBX through sip trunk.I can make voip calls from here to remote.I need a solution to reroute the calls through pstn automaticaly if this voip line is down.If anyone having solution for this please help me..any replies will be extremely valuable..

[Nicholas Matthews]

This is fairly easy. Let's say you have an access code of 9 followed by 10 digits for all calls.

dial-peer voice 1 voip

description to pbx

session protocol sip

destination-pattern 9..........

codec g711ulaw

no vad

dtmf-relay rtp-nte

preference 0 (default)

dial-peer voice 2 pots

destination-pattern 9..........

port 0/0/0:15

preference 1

If you leave out the preference, these will have the same destination pattern and the gateway will load balance between them by default. By putting a higher preference value on the POTS dial peer it will not be routed to unless the first dial peer fails.

hth,

nick