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New Member

FXO port and paging system

I would like to connect a paging system to Cisco Call Manager 6.1. I have a router 2811 with FXS and FXO ports. The manufacturer of the paging system told me that his system acts like a telephone system, so it should be connected to FXO. The available settings on the paging system are:

- C-wire is stand-by current <-> operating current

- connection is subscriber <-> cross-connection, exchange line

- loop current is provided internally <-> externally

The above is translated from German, thus I am not quite sure about the technical terms. The question is which settings should I choose? Next, what is appropriate for the FXO? Currently I have:

signal ground-start

cptone DE

impedance complex 2

timing hookflash-out 50

I have configured a route-group, a route-list and a route pattern. When I dial the number the LED at the FXO interface is lit shortly and I get a busy-signal.

Any ideas?

Hall of Fame Super Red

Re: FXO port and paging system

Hi Christoph,

I think a good first step would be to choose;

signal Loop-start

I can't see the Paging system using Ground Start.

Hope this helps!


New Member

Re: FXO port and paging system

here is what we have on our 2811 to work with valcom paging-- FXO port .. maybe it will help:

voice-port 0/3/1

supervisory disconnect dualtone pre-connect

supervisory answer dualtone sensitivity high

no battery-reversal

timing hookflash-out 50

timing sup-disconnect 1500

connection plar opx 5555

caller-id enable

New Member

Re: FXO port and paging system

It turned out to be a simple POTS, thus no FXO port but a FXS port was required (in contrary to what the manufacturer said). If found it when I started to measure voltage...

The "no battery reversal" was necessary, though.


Christoph Gartmann

New Member

FXO port and paging system


What is the config for the FXS port connect to Paging system?

Minh CCIE#11897 6016 Tillsdows Dr, Mississauga,ON Canada L5N4M3
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