Are the tones increasing in pitch?
No, the beeps are the same pitch - sounds like it was deliberately designed to be a loud and awful sounding as possible through an off-hook phone, to get your attention to go hang it up. My ears tell me it's roughly 250ms on, 250ms off and so on.
Are they the Special Information
Tones (SIT) that are also on the message when you dial a number that has
been disconnected?
No, not like that at all. I'll make a recording.
If so, then they are defined somewhere in the code, at least as part of app_zapateller since that is how it tries to get rid of telemarketers. You could then see about adding that to the dsp routines to detect the SIT tones and determine what to do at that time.
Taking my first peek at the code now...
BTW, which CAC channel bank did you buy? The ADIT 600 should do disconnect supervision, and I thought the AB1 did too.
It's the AB1 with 8 fxo, 16xfs. Here's the page I was talking about:
http://www.voip-info.org/wiki-Asterisk+hardware
Also, others have reported this problem but I can't find a resolution:
http://www.mail-archive.com/[EMAIL PROTECTED]/ msg18626.html
Are you also sure
you have that on your line so as to be detected? Your other option might
be to switch to groundstart lines which detect hangup much easier. May
be difficult to get unless you are a business though.
I just have regular business lines without any special provisioning. I don't understand why a $20 answering machine can do this but an expensive channel bank can't. :(
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