Joe Greco wrote:
More difficult is the problem of knowing when the remote end has gone away. Reversal, loop break, dial tone, and just plain silence are not all that unusual as methods of detection. In some cases, you do actually need to infer that the remote has gone away.
I understand that the phone company (sometime) doesn't provide information about remote hangup on POTS lines. What bugs me is the simple question - how does your average 10$ answering machine detects the hang up?
I'm guessing the obvious - DSP and some heuristics as to what a "hangup" sounds like and it sounds to me that it isn't all that hard to do in Asterisk (since it's done in those cheap machines) but I would be very glad to hear some tips from someone that knows a little better then me.
Thanks, Gilad
-- Gilad Ben-Yossef <[EMAIL PROTECTED]> Codefidence. A name you can trust(tm) Web: http://codefidence.com | SIP: [EMAIL PROTECTED] Tel: +972.9.8650475 ext. 201 | Fax: +972.9.8850643
"I am Jack's Overwritten Stack Pointer"
-- Hackers Club, the movie
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