Philip Edelbrock wrote:
We've got a Toshiba DK system w/ analog ports that went to a voicemail
server. I swapped in an Asterisk box with a Digium 4-port fxo card.
It /almost/ worked perfectly.
The problem is that Zap channels never hang up. They have to time out.
I set up MeetMe, but all Zap channels hung forever. Very annoying.
Same thing for FXO-to-FXO bridges.
I figured out today why and fixed it. Some proprietary voicemail
systems (and probably tie-lines, too) like to use DTMF tones instead of
standard ground/loop/kewl whatever signaling. Our key system was
programmed to use such DTMF tones instead of the usual analog signaling
on those ports. (I think it was program 31 on our Toshiba DK40i)
Asterisk of course ignored those, but the other systems used those for
line signaling (including our previous 3rd party system).
Amusingly, I know now why for years we kept hearing loud DTMF tones
when our branch office picked up their phones. Their system, too, was
configured to have those analog lines be connected to a voicemail
system and not to a FXO port on a T1 CSU.
I've just come across a similar problem with a more modern SpliceCom
hybrid PBX. We have an * system connected to two analog (FXS) ports via
a couple of Sipura SPA3000 ATAs, and we thought the Sipuras were failing
to detect call termination. Turns out that the default behaviour of an
FXS port on this PBX is *never* to hang up.
jd
--
John Daragon [EMAIL PROTECTED]
argv[0] limited (Asterisk implementation & consultancy)
Lambs Lawn Cottage, Staple Fitzpaine, Taunton, TA3 5SL, UK
v +44 (0) 1460 234068 f +44 (0) 1460 234069 m +44 (0) 7836 576127
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