03-30-2009 10:18 AM - edited 03-15-2019 05:11 PM
I am having issues with sending faxes to certain remote fax machines via local fax machines connected to our VG224 Analog gateway. The fax machine reports poor line quality and the faxes don't go through. If I go to another fax machine connected straight to the PSTN faxes to the same number go right through. I'm thinking this is something to do with my VG224 or CCM configuration. The path of communication is as follows:
LocalFax---VG224(MGCP)-CCM7--2811Router---PSTN(PRI)
My MGCP Config for the VG224 is listed below, any thoughts would be appreciated.
ccm-manager redundant-host 172.16.x.x
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server 172.16.x.x 172.16.x.x
ccm-manager config
!
mgcp
mgcp call-agent 172.16.x.x 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode nse
mgcp package-capability rtp-package
no mgcp package-capability res-package
mgcp package-capability sst-package
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp fax t38 inhibit
mgcp rtp payload-type g726r16 static
!
mgcp profile default
03-30-2009 11:28 AM
A couple of things to try:
no mgcp fax-relay sg3
no mgcp fax-relay ans
As well, on your PSTN gateway:
voice-port 0/0/0:23
input gain 9
shut
no shut
There's a bug out there for low-volume fax tone detection, and this may help you work around it.
The first couple of commands may be related to SG3 faxes failing.
-nick
03-30-2009 11:59 AM
Am I supposed to use the
no mgcp fax-relay sg3
no mgcp fax-relay ans
commands on the vg224? I'm running 12.42T5 Code on the vg224 and it doesn't recognize those commands. I'll try the input gain commands shortly.
03-30-2009 12:39 PM
If you're on an IOS version that doesn't support those commands there's no problems. But, they would still need to be applied to the PSTN gateway if it will take them.
-nick
04-01-2009 10:20 AM
You might want to try the commands:
mgcp package-capability fxr-package
mgcp default-package fxr-package
We had a 2811 with FXS ports and that solved our problem. Just an idea...
Rob.
02-02-2012 12:33 PM
I had a similar problem and found this Bug CSCtu18634, you can check the details on it to see if it works.
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