Calls fail due to excessive delay in response from PSTN

[6rlopez_2]

We have Call Manager 3.3(2) and a MGCP gateway with one PRI to PSTN and other PRI connecting to a PBX using Q.Sig. The problem is when a PBX phone places a call to an international mobile number, the PSTN takes a lot of time to process the call and as the PBX does not receive any response from the Qsig in 5 seconds it finishes the call. Is there a way that the Call Manager send any signal to the QSig to keep waiting or any other suggestion?

[ivan.marakovic]

Try adjusting ISDN T310 timer on the PRI.

http://www.cisco.com/en/US/customer/tech/tk652/tk701/technologies_tech_note09186a0080094487.shtml

Good luck.

Ivan

[6rlopez_2]

Thanks Ivan for the info.

i have a Service Request open with this issue. trhe problem is for the other PBX. Its T301 expires and they have to change it