[cisco-voip] FAX not working to one number FIXED

Thu May 24 22:29:56 EDT 2007

Well, since SCCP only supports passthrough, I don't see it causing any problems if the commands are there. I guess the commands force it to skip over figuring out what to do dynamically, but if it can only do passthrough with SCCP then there is a breakdown somewhere. Oh well, I am happy to get past another weird FAX problem with one number and not causing any other FAX problems. 

Now, TAC was suggesting going to Fax Relay now with MGCP or H323 and moving away from passthrough. So there must have been improvements, as before recent IOS versions passthrough was way to go. The new IOS versions (recent 12.4T) has a fax-relay command to make SG3 fax go to G3 fax also, but this is when doing Fax relay. 

----- Original Message ----
From: Lelio Fulgenzi <lelio at uoguelph.ca>
To: Erick Bergquist <erickbe at yahoo.com>; Ahmed Elnagar <aelnagar at ACT-EG.COM>; ciscovoip <cisco-voip at puck.nether.net>
Sent: Thursday, May 24, 2007 9:05:16 PM
Subject: Re: [cisco-voip] FAX not working to one number *FIXED*

[cisco-voip] FAX not working to one number

DIV {
MARGIN:0px;}

we're about to deploy a vg224 with 
sCCP.

think i should add this to my config from the 
start?

  ----- Original Message ----- 

  From: 
  Erick Bergquist 

  To: Lelio Fulgenzi ; Ahmed Elnagar 
  ; ciscovoip 

  Sent: Thursday, May 24, 2007 9:23 
PM

  Subject: Re: [cisco-voip] FAX not working 
  to one number *FIXED*

  FYI, 

We got the one number working.  We had to force the VG224 to do 
  fax and modem passthrough globally and by setting stcapp to enable passthrough 
  on each port. We had to do this even though SCCP (Stcapp) only supports 
  passthrough.

Commands added to VG224 config,

  voice service voip 
 fax protocol 
  pass-through g711ulaw
 modem passthrough nse codec g711ulaw

and then this, for each voice port...

  stcapp register capability 2/0 
  modem-passthrough

  ----- 
  Original Message ----
From: Lelio Fulgenzi <lelio at uoguelph.ca>
To: 
  Ahmed Elnagar <aelnagar at ACT-EG.COM>; Erick Bergquist 
  <erickbe at yahoo.com>; ciscovoip 
  <cisco-voip at puck.nether.net>
Sent: Saturday, May 19, 2007 9:39:10 
  AM
Subject: Re: [cisco-voip] FAX not working to one number

  where is this disabled?

    ----- 
    Original Message ----- 

    From: 
    Ahmed Elnagar 

    To: 
    Erick Bergquist ; ciscovoip 

    Sent: 
    Saturday, May 19, 2007 9:21 AM

    Subject: 
    Re: [cisco-voip] FAX not working to one number

    try to make sure that ECM 
    feature is disabled. this may cause fax failure

    Thanks 
    and Best Regards

Ahmed A. Elnagar
Network 
    Field Engineer

    Advanced 
    Computer Technology (ACT)
16 Fawzy Ramah St.Off Shehab 
    St.Mohandessin, Giza, Egypt 
Postal Code:12411 Cairo 
    Egypt

Mob: 
    +2010-2833868
Website: 
    www.act-eg.com
E-mail: 
    aelnagar at act-eg.com

    From: cisco-voip-bounces at puck.nether.net on behalf of Erick 
    Bergquist
Sent: Wed 16-May-07 9:10 PM
To: 
    ciscovoip
Subject: [cisco-voip] FAX not working to one 
    number

    I have a strange FAX issue, where a FAX machine connected to 
    a VG224 can send/receive FAX to any number but is not able to send one 
    outside number a FAX. It can receive FAX's from them fine, just not send. 
    The FAX machines phone or a phone plugged into the FAX phone line can call 
    the # fine so there is not a CSS issue, etc.

The FAX machine is 
    plugged into a VG224 with IOS 12.4(11)T , the VG224 is configured as SCCP 
    (stcapp) and we have tried setting the port capabilty to modem passthrough 
    and not with no change.

The PSTN Gateway is a Cisco 2821 with a PRI, 
    it is MGCP and running IOS 12.4(9)T and has FAX relay disabled.

We 
    have tried 7 different FAX machines of different models and neither are able 
    to call this particular outside FAX machine when going over IPT. When the 
    FAX machines are plugged into a traditional analog circuit there is not a 
    problem and the FAX works fine.

Any 
    ideas?

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