I have my asterisk up and running smoothly. However, I have set up a system whereby a user from Italy can call a local number there and that connects (via SIP) to my Asterisk box here in the US. I have also set up DISA so that they can then dial a local number here. However, I notice that the DTMF tones are not recognized properly – for example: when they enter the password, i.e., 8497, the Asterisk sees it as 884497 and authentication fails.
I don’t have this problem for callers from the US.
Anyone have any idea what I might do to correct this? I’ve changed the codecs allowed among all available – gsm, or inband, or rfc2833 – but that doesn’t seem to work.
Any suggestions greatly appreciated.l