Dear list,
maybe not really an Asterisk question, but... all my users dial in via
PSTN (via SIP DIDs) and enter a target number via DTMF through my
Asterisk 1.4. Out of about 150,000 calls per month I see on average
about 1 call per month where an arbitrary caller enters the letter 'A'
via DTMF. These callers use their mobile phones to dial in. I just
reread the Wikipedia article on DTMF but I don't understand how someone
can send an 'A'. Any clue?
Thank you!
Markus
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