06-28-2012 04:40 PM - edited 03-16-2019 11:55 AM
We have call Manager 7.1.3, MGCP gateway on Cisco 2811 running IOS Version 12.4(25b), with SRST configured
My question: If a user at the remote site is on an external call to the PSTN and the gateway looses its connection to Call Manager the gateway and phones go into SRST fallback. Will this call be dropped?
Phone ---------2811 with SRST----------T1 PRI------------PSTN--------Phone
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X
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CUCM Subscriber
06-28-2012 08:13 PM
Calls are preserved when using analog or CAS circuits. Call are dropped when using ISDN protocol, because L3 of the ISDN stack is disconnected from the MGCP call-agent (CUCM).
If you want to preserve calls, then use H.323.
Hope to help, please remember to rate the post if it does.
Kind regards,
- Adrian.
06-29-2012 05:36 AM
Adrian is 100% correct. +5.
Sent from Cisco Technical Support iPhone App
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