Fax machines via FXS ports not working
Posted on 2011-03-21
We have had many issues with faxes. Our network consist of a cisco voice gateway, call manager and a Nortel pbx. The way it is set up right now is that all calls come into the voice gateway, from there the voice gateway either sends the call the call manager, the pbx or an fxs port. In this case, we have several fax machines that where having problems. So what we did was connect these fax machines directly to an fxs port. We have a cor list that directs fax calls to certain incoming dial peers that send the fax c all to fax machines via the fxs ports. When a fax is being sent out, the cor list sends the fax calls out of one of pri lines.
The problem is that faxes don’t seem to work properly. On some machines we get a no fax detected error, in others all we get is buys. But if we connect a phone to it and call the line is not busy.
We have over 20 fax machines in our environment and not all of them are having problems, just these. At first we thought it was a networking issue as we had slips on some of the lines, but we took care of that and issues still persist. We have also disabled ecm on all the machines with no luck.
Any help would be greatly appreciated.