We have below call flow configured:-
IP Phone (IP phone ext. number 8061, called number 09930907777) -----> CUCM ------> Router-2 (h323 gateway, its PRI is down. Call routed to Router-1 by dial peer)-------> Router-1(h323 gateway, PRI is up call is routed to service provider) --------> Mobile phone (Phone number 9930907777 rings for around 10 seconds and gets disconnected)
Description:- I have CUCM 8.X and 2 voice gateway router configured on h323 protocol. Both the router has PRI connectivity. CUCM is configured so that it routes call first to Router -2, if router-2 PRI is down the call is routed to router-1 by the dial-peer configured to router-2. The call is sent to service provider using PRI terminated on router-1
Problem:- In above scenarion when router-2 PRI is down, and the IP Phone (ext number 8061) calls the mobile number (09930907777) the mobile phone rings for only 10 seconds and call gets disconnected. If mobile user answers the call within 10 seconds then also call gets disconnected.
Attached is show run of both the routers. Also find attached file with output of:-
debug isdn q931
debug voice dial-peer inout
debug voice ccapi inout
debug cch323 all
Please suggest what is reason for this problem and its resolution.
Thanks in advance.