[cisco-voip] Fwd: Faxing over SIP Trunk

[Voice Noob]

Why don't you send the call from the Nortel box as H.323 directly to the
gateway and skip the SIP trunk?

On Thu, Jul 10, 2008 at 11:32 AM, Nick <csvoip at googlemail.com> wrote:

> We are using fax machines connected to the Nortel CS1000 pbx which routes
> the faxes over the SIP trunk to CUCM 6.1, which then routes to a H323
> gateway and out of an E1 to the PSTN. This is just for outbound faxes as all
> inbound are local to the site.
>
>
> 2008/7/10 James Buchanan <jbuchanan at ctiusa.com>:
>
>>  Depends. Are you using a FoIP solution, or are you using fax machines
>> for inbound and outbound faxing?
>>
>>
>>
>> *From:* Nick [mailto:csvoip at googlemail.com]
>> *Sent:* Thursday, July 10, 2008 11:24 AM
>>
>> *To:* James Buchanan
>> *Cc:* Matt Slaga (US); cisco-voip at puck-nether.net
>> *Subject:* Re: [cisco-voip] Fwd: Faxing over SIP Trunk
>>
>>
>>
>> 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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>>
>>
>>
>>
>>
>
>
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