Fax Machine on FXS

Unanswered Question
Jul 18th, 2007


I have a fax machine connected to an FXS port on CME. The problem happens when somebody calls from outside and then hangs up. The fax machine is not hanging up sometimes and sometimes it takes up to 45seconds to hang up. I tried to tweak the timeouts under the port but still the same problem.

Any help is greatly appreciated,


I have this problem too.
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Paolo Bevilacqua Wed, 07/18/2007 - 10:40

I don't think you can do anything about it. It's the fax takes takes 45 seconds trying to establish a link that will never happen.

In theory, you could send battery reversal or power denial to tell the fax that the call had been disconnected, by in my experience most model will ignore any line singalling.

Hope this helps, please rate post if it does!

m-haddad Wed, 07/18/2007 - 10:47


So what would be the solution then? Sometimes the port stays off-hook for a long time.


m-haddad Wed, 07/18/2007 - 13:30


Actually, the FAX is connected to an FXS port. THe feed from PSTN is a PRI.

Any ideas?


m-haddad Thu, 07/19/2007 - 13:41

Would changing the old fax machine to a new one solve the issue?


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