[cisco-voip] VG224 + SCCP + FAX + CCM4.1(3) supported?

[Paul Choi]

ECM is commonly used for FAX but has a low tolerance
for errors and can cause FAX transmissions to fail at
a higher than normal rate.

...so I read in the Cisco manual.

Paul

--- Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

> What do you mean by disabling ECM on all FXS ports -
> I was under the 
> impression that's a FAX configuration.
> 
> ----- Original Message ----- 
> From: "Paul Choi" <asobihoudai at yahoo.com>
> To: "Jason Aarons (US)"
> <jason.aarons at us.didata.com>; 
> <cisco-voip at puck.nether.net>
> Sent: Monday, January 28, 2008 9:57 PM
> Subject: Re: [cisco-voip] VG224 + SCCP + FAX +
> CCM4.1(3) supported?
> 
> 
> >I got FAX working by disabling ECM on all FXS ports
> > and enabling fax protocol pass-through codec
> g711ulaw
> > on the router where the incoming calls were
> > originating with a PRI. I stuck the same commands
> on
> > the local router and the VG224 and FAX
> transmissions
> > were successful henceforth. Thanks folks!
> >
> > Paul
> >
> > --- "Jason Aarons (US)"
> <jason.aarons at us.didata.com>
> > wrote:
> >
> >> After spending several hours with TAC after a 224
> >> IOS upgrade, doing
> >> debug hpi and extensive troubleshooting to no
> avail
> >> (the pcm capture
> >> said it was the PSTN), we decided to downgrade
> VG224
> >> IOS. That didn't
> >> work.  Changed IOS again and it worked.  I would
> try
> >> 2-3 versions of IOS
> >> before opening a TAC case.
> >>
> >> I have several sites with SCCP/VG224.  The global
> >> "voice service voip /
> >> modem passthru" on both VG224 and Gateway is
> >> recommended.  Disable G3
> >> and no ECM.  I have modem, faxes, credit card
> >> readers working when doing
> >> this.
> >>
> >> -----Original Message-----
> >> From: cisco-voip-bounces at puck.nether.net
> >> [mailto:cisco-voip-bounces at puck.nether.net] On
> >> Behalf Of Paul Choi
> >> Sent: Monday, January 28, 2008 6:42 PM
> >> To: cisco-voip at puck.nether.net
> >> Subject: [cisco-voip] VG224 + SCCP + FAX +
> CCM4.1(3)
> >> supported?
> >>
> >> I have installed the latest IOS on the VG224 and
> >> have
> >> the needed ports registered on the CCM cluster
> using
> >> SCCP. Voice calls work fine. FAX transmissions
> >> however
> >> don't work the first time around. The first time
> I
> >> transmit, I get nothing. The second time the fax
> is
> >> automatically retried, it apparently sends ok.
> >>
> >> Is SCCP + fax passthrough just not supported? I
> see
> >> no
> >> documentation on this on Cisco's website.
> >>
> >> I'm pulling my hair out.... :(
> >>
> >> Paul
> >>
> >>
> >>
> >>
> >
>
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