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Using connection trunk and fxs/fxo card problems

I have two 1751V routers one with fxs card connected to CO analog port on a PBX. The other 1751 has a fxo card attached as a station to a remote PBX. The trunks set up as required and the setup will work for a while. Eventually the fxs card, specifically port 0 will ring incessantly. Despite an off-hook condition, as soon as the call is answered and hung, the ringing starts again. Software is 12.1(5)YB4.

pending case C163691


Re: Using connection trunk and fxs/fxo card problems

Two things are wrong with this soultion

1. the fxsport only supports analogue phone connection. You

cannot connect it to the pbx CO port. What you've done is the pbx is

suppose to be or simulate a phone which makes

and receives phone calls.

2. with trunking between the ports, whenever the remote fxo

goes off-hook, the fxs port its being

trunked to would ring. Trunking simulates a physical

wire between fxs-to-fxo.

a)The phone would always ring if the fxo goes off-hook.

b)The fxs port ca go off-hook and it would play a dialtone sourced

from the remote fxo, it cannot collect the digit inputed by the PBX, the remote

fxo-pbx connection port would be responsible for that.

The is fsx-to-fxo trunking should e used for a phone line extention to

a remote site, i.e PBX1--fxo--voip--fxs--phone. logically the phone

is connected to PBX1.

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