[Asterisk-Users] dtmf tones problem with unicall and E1

[Martin Joseph]

On Mar 3, 2006, at 9:48 AM, Anton Krall wrote:

> Guys.
>
> I have a te100p with unicall and an E1 and Im having problem with DTMF 
> tones
> but the weird thing is, I only have problems sending the tones to 
> certain
> phone numbers, anybody seen this behavior?
>
> Asterisk shows on the console the dtmf tone been pressed but seems the 
> other
> side is not getting them, and this just happens with certain phone 
> numbers,
> not all..
>
I have seen this through my FXO, when the transmitted volume is too 
loud and apparently the audio breaks up at the other end?  This was 
somewhat speculation on my part,  but adjusting the transmit gain down 
did seem to resolve it, so that was the proof.

It's pretty difficult with such a huge variety of different phone 
systems and equipment out there to get them all working acceptably.  Of 
course my biggest issues have been with the stupid phone system at my 
wife's workplace!  I had to retune my gains for that system after I 
thought I was done...

It's clearly a compromise,  and I suppose if the hardware (FXO in my 
case) had a GOOD auto gain adjust that might help...

Marty