[asterisk-users] DTMF signalling, SIP, and Background()

[Bastian Friedrich]

Hi,

I am currently setting up a voice mail/IVR machine with asterisk (1.4.10 
at the moment). During testing and evaluation, all was fine; in the - 
slightly different - production environment, the IVR contexts do not 
react sensibly.

The environment is:
POTS <-- (ISDN) --> PBX <-- (SIP) --> Asterisk
with the Asterisk registering with our local PBX.

When a user reaches the Asterisk machine via this path, key presses are 
ignored during the Background() function.

My debugging possibilities have been a little restricted, unfortunately 
(I'm working on that), but as a wild guess, I suppose we might have the 
following problem: When a call is processed as a SIP call, "in-band" 
DTMF signalling does not trigger an event in Asterisk; our PBX 
possibly/probably does not create a SIP event for DTMF signalling.

Would you think that this may be the reason for our experienced 
problems?

Do you have any hints/solutions? I'll have to check whether we can 
connect PBX and Asterisk via ISDN, in which case the DTMF signals 
should be handled fine - we'd prefer to stick with the current setup, 
though.

Thx, Regards,
   Bastian

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