[cisco-voip] pstn fallback

[anand]

Hi

I have two 3845 routers with cme installled on the routers.I have voip dial
peers as well as pots dial peers.WHEN ip LINK IS DOWN the call is going
through the POTS.

My question is without SRST how can the routers do a fallback and follow
PSTN path.Is SRST manadatory for PSTN fallback?


THANKS,
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