Voice is not getting through DISA

Hello,
we are make call from outside number to asterisk server(1. 8) and set inbound destination as DISA,if enter the outside number(mobile number),the call will happening but voice is not getting.

Insufficient information.

we are make call from outside number(mobile number:99X.) to asterisk server through gsm trunk and set inbound destination as DISA.if enter the outside number/local number using DISA concept ,the call is happening but voice is not getting(no error logs are generated).

Do you you mean you are calling the DISA application from your dialplan? “Setting inbound destination” sounds more like something implemented by a GUI, rather than Asterisk itself.

In any case, you need to turn up the logging until you do have some information about what is going wrong.

I’m not sure what GSM trunk means, in Asterisk terms, but, if you are not using VoIP, the only thing I can think of is that you might need to enable internal timing and provide a timing source.

thanks,
GSM trunk means,we are creating custom trunk(inbound route and out bound route).if enter the outside number/local number using DISA concept ,the call is happening and also getting voice only some time(some time getting and some time not getting).