[cisco-voip] Fwd: Faxing over SIP Trunk

[Nick]

Do I have to use T38 for this to work then, the gateway is already set up
for modem passthrough as the calls come from the CUCM to the gateway and
faxing from elsewhere is working fine, it's just the faxes that originate
across the SIP trunk that do not work.



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

>  I believe this may give you some assistance:
>
>
>
>
> http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/cisco_ios_fax_services_over_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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