[cisco-voip] VG224 to RightFax communication error issue

[Kalyan Iyer (AM)]

Folks,

I came across this tech article on Cisco's website

http://www.cisco.com/en/US/docs/ios/voice/fxs/configuration/guide/fxsrelay.html#wp1086440
which mentions t.38 support for IOS versions 12.4(6)XE and later on SCCP controlled voice gateways. This customer is running 15.x. Shouldn't the t.38 fax relay be supported?
what am I missing?


________________________________________
From: Jason Aarons (AM)
Sent: Saturday, January 19, 2013 7:42 AM
To: Matthew Ballard; Kalyan Iyer (AM); cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] VG224 to RightFax communication error issue

Correct, SCCP doesn’t support standards based T.38.  The VG224 port would need to be changed from SCCP.

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Matthew Ballard
Sent: Friday, January 18, 2013 4:23 PM
To: Kalyan Iyer (AM); cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] VG224 to RightFax communication error issue



Assuming that RightFax is exclusively using T.38 Standards Based (which it probably is), unless something has changed that I'm not remembering (and even then it would depend on the version), SCCP doesn't support standards based T.38.

I configured my VG224 to use MGCP with T.38 for the fax/modem ports, and SCCP for the voice ports.

The router on H.323 probably just needs to be configured to support T.38.

It would probably also work if you passed the call through the PSTN (ie used the full number with whatever you use to indicate an outside call).

Matthew Ballard
Network Manager
Otis College of Art and Design


From: "Kalyan Iyer (AM)" <kalyan.iyer at dimensiondata.com<mailto:kalyan.iyer at dimensiondata.com<mailto:kalyan.iyer at dimensiondata.com%3cmailto:kalyan.iyer at dimensiondata.com>>>
Date: Friday, January 18, 2013 10:48 AM
To: "'cisco-voip at puck. net'" <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net%3cmailto:cisco-voip at puck.nether.net>>>
Subject: [cisco-voip] VG224 to RightFax communication error issue

I have a customer that has the following setup

Analog Fax -- > VG224 ---SCCP--- > CUCM ---H323--- > RightFax (virtual server)
Or
Analog Fax --- > EVM card on router --- H323 --- > CUCM ---H323--- > RightFax (virtual server)

When they try to fax in to the RightFax server in both the scenarios, they hear the fax tone but get a communication error. I was told that when they were using SIP between CUCM and RightFax, it worked well. They are however able to fax out from the RightFax server to the fax machine.

The VG224 configuration is attached. Any help will be appreciated.

Thanks



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