[cisco-voip] Fax Machines having a very delayed response

[Lelio Fulgenzi]

Correct. Got to turn off SG3 (33.3 to 14.4 and turn off error correction). 



--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"Bad grammar makes me [sic]" - Tshirt 


----- Original Message ----- 
From: "STEVEN CASPER" <SCASPER at mtb.com> 
To: "Nick Matthews" <matthnick at gmail.com> 
Cc: cisco-voip at puck.nether.net 
Sent: Tuesday, May 19, 2009 2:09:04 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [cisco-voip] Fax Machines having a very delayed response 


You still can not use SG3 through a gateway though, right? 

By the way thanks for your various fax posts, they have been very useful 

Steve 


Please consider the impact on our environment before printing this e-mail. 

>>> Nick Matthews <matthnick at gmail.com> 5/18/2009 8:46 PM >>> 
It's possible that the SG3 to G3 conversion that is on by default in 
12.4(20)T and later is blocking the high speed fax tones in the 
beginning and it takes a while for the low speed to come through. 

To play devil's advocate on the MGCP vs SCCP debate, MGCP is actually 
more feature rich when it comes to fax machines. And since your fax 
machines aren't going to be doing hold/resume and group pickup, it's 
rather irrelevant. Possibly more administrative overhead, but MGCP is 
probably a better fit for fax machines, although H323 is probably even 
better. 

To disable the SG3 conversion: 
no mgcp fax-relay sg3-to-g3 
no mgcp fax-relay ans-disable 

Worth a shot anyways. 

There were a some MGCP T38 bugs in 12.4(15)T8 and 12.4(22)T1 you may 
want to watch out for also. 


-nick 

On Mon, May 18, 2009 at 8:38 PM, Erick Bergquist <erickbee at gmail.com> wrote: 
> What do you mean by "delayed" response? 
> 
> Do you have the FAX machine Error Correction Mode turned off, and 
> reduced the FAX machine speed to 14400 or 9600? 
> 
> Are both gateways (VG224 where FAX machine is) and the PSTN gateway 
> set for same FAX method (passthrough or relay). 
> 
> Is the PSTN Gateway that the calls leave on also MGCP? 
> Can you FAX internally between 2 FAX machiines on the VG224 fine? 
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