Hi,
I am preparing to roll out Asterisk setup with TDM400P, 4 FXO modules in a small office. Asterisk will replace legacy system (4 telco lines, 8 extensions PBX), but before the new system and ip phones would be installed, the legacy system is still in use. The four telco lines are now connected in parallel both to legacy PBX and the 4 FXO modules in TDM400P. Asterisk is configured not to pick up any incoming calls.
zapata.conf:
signalling=fxs_ks musiconhold=default languages=en context=inbound-analog group = 1 channel => 1-4
zaptel.conf:
loadzone = us defaultzone=us
fxsks=1-4
I am dialing out via Asterisk and it works fine untill the following situation:
- one of the telco lines occasionally becomes mute after call is completed, would not provide dial tone, (not sure about ringing on that line) - both via old and new PBX.
- zap show channel <n> would show that line as 'Offhook', though no telephone is off hook.
If physical line would be unplugged from TDM card, the line would become normal again.
Sorry, if it is a well known problem, but I did not find any specific information yet.. Please answer two questions:
- is it really bad to have parallel connection on TDM400P FXO lines to an additional telephone equipment, does it prevent TDM400P to detect Offhook/Onhook correctly?
- will the problems go away when parallel lines would be disconnected (legacy PBX shut down)?
As you may understand the office personnel has anxiety that this may be a bad Asterisk setup / bad TDM card etc (which I am sure so far that it is not).
Please help.
Sincerely, Andrei
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