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New Member

Fallback - SRST

i tested srst and found that when in fallback mode only some of my phones could get an outside line. i switched fxo ports and backup lines to see if the other phones could get out and in some cases they could but there were phone who could never get out no matter which port i used.

any advice or link to white paper would be great!

Thanks in advance

Cisco Employee

Re: Fallback - SRST

I wonder if you were making calls too quickly. Can you please make sure that the voice ports show back on hook and then make the next call.

If calls still fail, couple of things to check:

debug dialpeer - make sure the right dial peer is being used to go out (check the voice port configured under the dial peer). Next, check debug vpm signal to determine why the call is not going thru.

New Member

Re: Fallback - SRST

how do you make sure voice ports are back on hook?

i have the fxo in slot 2 on my 2801 - would this be the proper port configuration for this?

dial-peer voice 913 pots

destination-pattern 911

no digit-strip

port 0/2/0

prefix 911

dial-peer voice 17 pots

destination-pattern 9011T

port 0/2/0

prefix 011

Cisco Employee

Re: Fallback - SRST

show voice port summ

show voice call summ

will tell you the voice port status

Yeah, your config seems ok.