[cisco-voip] Fwd: Faxing over SIP Trunk

[James Buchanan]

I believe this may give you some assistance:

 

http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/cisco_ios_fax_services_ov
er_ip_application_guide/t38.html#wp1158066

 

This will help you troubleshoot the T.38 side.

 

From: Nick [mailto:csvoip at googlemail.com] 
Sent: Thursday, July 10, 2008 11:09 AM
To: James Buchanan
Cc: Matt Slaga (US); cisco-voip at puck-nether.net
Subject: Re: [cisco-voip] Fwd: Faxing over SIP Trunk

 

Yes, the call goes out of an H323 gateway to the PSTN.

2008/7/10 James Buchanan <jbuchanan at ctiusa.com>:

Are you using an H323 gateway?

 

From: Nick [mailto:csvoip at googlemail.com] 
Sent: Thursday, July 10, 2008 11:03 AM
To: James Buchanan
Cc: Matt Slaga (US); cisco-voip at puck-nether.net
Subject: Re: [cisco-voip] Fwd: Faxing over SIP Trunk

 

We are going straight into the CUCM and then routing the calls from
there to a gateway and out the PSTN.

2008/7/10 James Buchanan <jbuchanan at ctiusa.com>:

Are you going through a gateway or going straight into UCM?

 

From: Matt Slaga (US) [mailto:Matt.Slaga at us.didata.com] 
Sent: Thursday, July 10, 2008 10:55 AM
To: Nick; cisco-voip at puck-nether.net; James Buchanan
Subject: RE: [cisco-voip] Fwd: Faxing over SIP Trunk

 

Make sure you are using G711 over your SIP trunk.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Nick
Sent: Thursday, July 10, 2008 11:52 AM
To: cisco-voip at puck-nether.net; James Buchanan
Subject: [cisco-voip] Fwd: Faxing over SIP Trunk

 

We are trying to fax over IP across the SIP trunk and route out of a
PSTN gateway. I missed typed my e-mail and it was supposed to say faxes
are not working.

2008/7/10 James Buchanan <jbuchanan at ctiusa.com>: 

	 

	Is this FoIP? 

	 

	From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Nick
	Sent: Thursday, July 10, 2008 10:40 AM
	To: cisco-voip at puck-nether.net
	Subject: [cisco-voip] Faxing over SIP Trunk

	 

	We are having some issues with faxing over a SIP trunk, the
setup is Nortel CS1000 > SIP Trunk > CUCM 6.1. All outbound calls from
the CS1000 are routed to go out of a gateway connected to the CUCM,
phone calls are fine but faxes are working, the calls are getting to the
gateway and you hear the fax machine answer and get fax tone for about a
second then it cuts off. The debug on the gateway shows normal call
clearing and no errors.

	 

	Does anyone have any experience of this sort of set up? or any
useful troubleshooting tips.

 

 

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