Using a Rhino FXS Analog Chanel bank to actuate a relay

ok so i've got a VOIP system that's connected to a Rhino FXS Chanel bank  that's used to control our overhead paging system. From the Rhino we go to a Volcom analog adapter to a Volcom Stacker unit (echo cancelation). Every once in a while this system will "lock up" and just throw static over the paging system (and even more rarely someone will put the overhead paging system on hold which pumps our hold music over the intercom system)...to combat this i've got the Rhino, the adapter, and the stacker pluged into a surge protector so that when the "abnormal condition occurs" we just flip the switch on the surge protector and it drops the whole system. then we turn it back on and all is well.

This works great but the system is in a remote location in the facility so it takes a bit of walking to get to it. What i'd like to do is try to hook up a NC relay between the surge protector and the wall and have an open channel on the Rhino actuate the relay to basically turn the power off to the system any time you dial a specific extension.

According to the datasheet the Rhino itself has a line current limit from 18ma to 45ma and it emits standard telephone line voltage....i can also configure the ring cadence...so i can probably set the ring duration long enough to actuate the relay before it cuts the system off (which would then return the relay back to closed)

i'm having trouble finding out what the actual output voltage on the analog line and a general lack of schematics to try to make this work

so...if anyone wants to have a little fun attempting to design a relay that can be actuated by a telephone...please reply

caitlinsdad4 years ago
Maybe look up POTS http://en.wikipedia.org/wiki/Plain_old_telephone_service.  You'll have to dig deeper for when it rings which I think is 90 volts.