SRST outbond calls over SIP trunk issue

[abd88elhak]

Hi

i have CUCM 10.5 and a voice gateway 2921 connected to PSTN  over BRI and then SIP trunk link this :

CUCM ====> voice gateway (SRST)=BRI==>getway PSTN=====SIP========PSTN

calls over CUCM are good (in /out)

calls en srst mode (in =ok) (out ==nok) we get as message (Cause i = 0x829F - Normal, unspecified)

we contacted the PSTN and he said that there is mismatch codec

plaease find  in the atached files the debug and config gateway and  capture of the codec that we used actually send from PSTN:

[Brandon Buffin]

Can you explain further? The call is going out the PSTN via BRI? or SIP? I don't see any SIP config (dial peers, etc.).

Brandon

[abd88elhak]

Hi

My srst gateway connected to PSTN over BRI 

the telephony provider said that the outgoing calls disconnect because there is mismatch codec

he send me this capture the value 101 must be 8

[Brandon Buffin]

This is a SIP capture. Which device is terminating the SIP call? Is the carrier's gateway doing SIP and handing off BRI to you?

[abd88elhak]

Hi

my srst gateway to PSTN gateway over BRI and this pstn gateway connected to swisscom by sip connection

 srst==BRI===> pstn gateway ====SIP==> PSTN

pstn said the the codec must be PCMA so what config should i do to resolve this pb

regards 

[Brandon Buffin]

Do you control the SIP gateway? If so, post the config. This is where the change will need to be made.

[abd88elhak]

no i have access only to my SRST gateway (other is controlded by pstn)

for info: the calls over cucm are good