How to setup the failover in a FXO trunk group ?

[federico_tv]

I set up a two FXO ports trunk group (old cisco 1760) with priority on first port.

It works, but if I detach PSTN from first port (line failure) , the call is still routed via that port.

Is it possible to make system aware of failure in order to use the working line(s) ?

Thank you

[M02@rt37]

Hello @federico_tv,

You can configure IP SLA probes to periodically check the connectivity of the first FXO port, and if it fails, the router can switch to using the second port for outgoing calls.

I think about configuring hunt groups. You can specify a sequence or priority order in which the router should attempt to use the FXO ports for outgoing calls. If the first port fails, the router will automatically try the next available port in the group.

[federico_tv]

Well I tought when no line voltage is applied/detected from FXO port, there was an automatic shutdown/alarm state on that voiceport 

Probably it doesn't happen... ?

[Roger Kallberg]

Try with what is suggested in this post. https://community.cisco.com/t5/ip-telephony-and-phones/bri-trunk-group-failover/td-p/2028232