[cisco-voip] MGCP FAX Blues

[Jon Carnes]

It's an interesting problem - isn't it?

We've battled this for years now, and the only correlation we can find
is that the problem faxes (the ones you have trouble sending to) seem to
use the Super G3 standard for faxing.

As another person mentioned yesterday, see if the folks having problems
on the receiving side can set their fax machine to it's lowest speed
(and not on Auto-detect). In the past that has worked for us, but Good
Luck getting folks to do it! 

As a standard, we now run analog lines out to folks for their Fax use.
We still have a handful of clients using ATA's for their faxing, but in
general those folks don't do a lot of faxing (or they fax to the same
numbers all the time).

Jon Carnes
FeatureTel

On Mon, 2005-03-21 at 22:17, Erick Bergquist wrote:
> Hi,
> 
> I have been trying to fix a FAX issue for the past 1-2
> weeks. We have a 2611XM MGCP Gateway with a ISDN PRI
> and CCM 3.3(4)sr2. We have FAX machines off a VG224
> MGCP gateway. Most fax's are working fine, but we can
> not make outbound FAX's to certain numbers. We have
> had these numbers looked at by the telco and involved
> carriers and no problems being found. FAX's always
> fail to these FAX machines. 
> 
> If we put FAX machine on a analog POTS line (not VoIP)
> it works. If e take FAX machine to another office
> (company) next door who has their own seperate AVVID
> install w/seperate equipment and PRIs the same FAX
> machine can call the problem numbers without issue.
> 
> Anyone have any ideas on how to fix this? We have
> tried FAX RELAY, FAX PASSTHROUGH, MODEM PASSTHROUGH,
> etc. 
> 
> Thanks
> 
> 
> 
> 		
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