[asterisk-users] users can not hear the audio playback sometimes

[Gareth Blades]

On 25/09/13 09:54, Kumar Shantanu wrote:
> I am facing a strange problem on my asterisk box (using isdn lines 
> with pri card installed on it). Normal incoming/outgoing calls are 
> working perfectly fine.
>
> When a user dial a wrong/out-of-service number they don't hear back 
> any such message like "The number is wrong or user is switched off" in 
> some cases, and it's just a silence for the user.
>
> Now while troubleshooting we set recording to ON for the extension so 
> we can see what's there in the recording file(.gsm). When I am listing 
> to the recording files it contains everything which users should be 
> listening actually, like "the number you are dialling is not correct."
>
> So the question is why user is not able to listen to this while 
> asterisk itself is getting the message perfectly fine from the 
> provider ? Am I missing something my dahdhi.conf ?
>
> Or anybody having any idea about this can please put me through the 
> right direction. 

Try calling Progress() just before the dial command. Without this 
Asterisk wont send the SIP/183 Session Progress and send the inband 
audio until the call is answered.