asterisk-users - Handling DTMF for number 4

Dear all, I have Asterisk 1.4.23 implemented with an IVR wainting for
mobile phone calls coming from a GSM Gateway.
All the components are set up in DTMFMODE = RFC2238, and so when the
caller from mobile touches the IP phone LAN extension, the call is
succesfully established. Everything is OK except for the DTMF for
number 4, because if the caller from mobile dial 1004 or 1014
extensions -which have the number 4- the calls are errouneosly
established with extension 1000.
I live in Argentina, but I don't know if the DTMF frequencies are the
same than other countries or I have to make a change in somewhere.
Can be a problem with the detection of DTMF for number 4 in Asterisk ???
Thanks a lot
Alejandro
asterisk-users mailing list
http://lists.digium.com/mailman/listinfo/asterisk-users

Alejandro Cabrera Obed wrote:
The gsm gateway would be performing the DTMF detection and just sending
on what it detected as you have the DTMFCODE set as RFC. Maybe if you
set the DTMF mode to INBAND it may pass the audio straight through and
allow asterisk to detect it.
The problem is that mobile calls are heavily compressed so any entered
digits are converted to tones once the information reaches the network
operator. As the call is gong back over a mobile connection the DTMF is
compressed which results in unreliable detection.
asterisk-users mailing list
http://lists.digium.com/mailman/listinfo/asterisk-users