well, I just spoke to someone at Sangoma and they had me execute the
following command after dialing into one of my channels:

wanpipemon -i w1g1 -c aregdump -m <channel number>

which gives the following output:

 ------- Direct registers (FXO,port 0) -------

0. 00   1. 00   2. 03   3. 00   4. E9   5. 09   6. 00   7. 00

and when the phone has been disconnected, I get the following:

0. 00   1. 00   2. 03   3. 00   4. E9   5. 08   6. 00   7. 00

(the entries are listed by byte, in the above example, byte 5 has
changed from 09 [channel is connected] to 08 [channel is not
connected])

Anyways, after I hung up the line, the status wouldn't change for
about 15 or so seconds.   Now I'm not sure if this indicates a problem
with the Sangoma card, or if it may just confirm that Asterisk is
holding onto the channel.  The Sangoma tech support person said they'd
write up a support ticket and have someone else contact me regarding
this..

If anyone else has run into the same problem, please let me know.  Thanks,

Mike

On 4/24/06, Andrew Kohlsmith <[EMAIL PROTECTED]> wrote:
> On Monday 24 April 2006 14:20, Mike Garey wrote:
> > We're having some problems on our asterisk box where a user calls in
> > through a PSTN line, gets to voicemail, but hangs up before leaving a
> > message, yet asterisk doesn't realize the phone has been disconnected
> > and starts recording an empty message, which of course can become very
> > annoying.  I also notice that when calling from a PSTN line and
> > ringing an extension, then immediately hanging up, the SIP phone on
> > the other end will continue ringing about 4 or 5 times before Asterisk
> > realizes the call has hung up.
>
> Bell Canada does indeed provide CPD, but I don't think it's in a form that the
> analog cards are happy with.
>
> If you use your cellphone to call your landline, have a short conversation
> with yourself and then hang up the cellphone, the landline will go
> completely, totally dead for about 300-500ms before you get another dialtone.
> That's Bell's CPD:  Battery removal.  If you have a VOM you can place it
> across the tip&ring and see the ~5V drop to 0 briefly before going back to
> ~5V when this happens.
>
> You *might* be able to get away with callprogress=yes but that's also crappy
> and can cause random disconnects.
>
> -A.
>
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