09-02-2009 10:51 PM - edited 03-13-2019 06:37 PM
Hi,
We have 2801 CME router. Also I connected a fax to this CME. But it gives communication error when sending fax and sometimes receiving. I tried with ATA and FXS ports but still the same problem. When I connect an analog phone to this line I can make calls and receive calls. Also when I connect directly analog line to fax (no cme) it works no problem. What can be the problem ? (Also I tried with two faxes) Can there be a software bug?
Thanks
(C2801-SPSERVICESK9-M), Version 12.4(20)T1, RELEASE SOFTWARE (fc3)
09-03-2009 04:39 AM
You can try this on the line:
input gain -3
output attenuation 5
Sometimes this configuration helps.
-nick
09-08-2009 12:40 PM
Kindly attach the config.
09-28-2009 10:38 PM
Hi,
FAXes can be particularly picky when it comes to line quality. Especially G3 faxes are a nightmare in an IPT environment.
I've been able to get some faxes working by disabling ECM (error correction mode) on it. As far as I know, this is only for sending. So this means that someone trying to send a fax to one of your fax machines would have to disable ECM on theirs.
See also http://www.voipmechanic.com/faxsettings.htm for some background.
Hope this helps!
Best regards,
Donald.
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