[cisco-voip] SG3 Faxing and IOS v15.1 (new thread)

[Lelio Fulgenzi]

I thought I'd start a new thread to help with future searches. 

I took a closer look at that link I sent out earlier, the one that pointed me to CUBE configuration, and it turns out there is a section in there that talks about: 



SG3 Fax Support on Cisco TDM-IP Voice Gateways and Cisco UBE Platforms 

http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gw-config.html#wp1423706 


While it goes in depth about relay, for fax pass-through, it simply points to an old v12.4T document ( link ). The new one (for v15.1) doesn't seem to go into any specific discussion about SG3 speeds, in fact, all it talks about is SG3 downgrading to G3. 

In reading it more closely, it mentions only: MGCP, H323, and SIP. Is SCCP out? 

In reading it even more closely, it mentions that if you're using all Cisco gateways, you should use modem passthrough. 




Note Modem pass-through is preferred if all of the involved gateways are Cisco IOS gateways. 

And even more reading says if you're using CCM, you MUST use modem passthrough. 


Note If you need to configure fax pass-through to work with Cisco CallManager (CCM), you must use the modem passthrough nse command. The f ax protocol pass-through command does not work with CCM, which relies on NSE information. 
So what's the deal? 

    • Is SG3 supported on modem passthrough which I now must use? 
    • Does that mean I can stick with SCCP on my VG224, since SCCP supports modem passthrough? 










keywords: super G3 faxing fas passthrough fax pass-through confusing 

--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 

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