asterisk users - Oct 2005 - fax device behind TDM400P

Hello,

iam trying to connect an analogue Fax (as opposed to a ISDN Fax device)
behind a TDM400P.  However, when i connect the Fax to the Card, asterisk
shows it as always being offhook.  Iam currently out of ideas what might
be wrong.  The Fax device is connected using a 1:1 four-wire RJ cable. The
setup in zapata.conf is:

| callwaiting=0
| context=fax_out
| faxdetect=both
| adsi=0
| callerid=3099999
| channel =>2

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http://www.ukeer.de/about.html

On Wed, Oct 19, 2005 at 08:43:16AM -0400, asterisk
wrote:
> I assume you are connecting the fax to an FXS port on your TDM400P as FXO
> will not work.
Correctly assumed :-)
 
> Have you tired a different RJ11 cable between the FXS port and the fax.
> Surprisingly, cables seem to be one of the most common causes of these
types
> of problems.  It the cable was made poorly or stretched too much at some
> point, there may be a short which will cause the offhook condition.
Indeed, i replaced the four-wire RJ11 with a self-built two-wire, and
now everything works fine.


thanks!
-- 
http://www.ukeer.de/about.html

> Hello,
>
> iam trying to connect an analogue Fax (as opposed to a ISDN Fax device)
> behind a TDM400P.  However, when i connect the Fax to the Card, asterisk
> shows it as always being offhook.  Iam currently out of ideas what might
> be wrong.  The Fax device is connected using a 1:1 four-wire RJ cable. The
> setup in zapata.conf is:
>
> | callwaiting=0
> | context=fax_out
> | faxdetect=both
> | adsi=0
> | callerid=3099999
> | channel =>2
>
Rico,

I assume you are connecting the fax to an FXS port on your TDM400P as FXO
will not work.

Have you tired a different RJ11 cable between the FXS port and the fax.
Surprisingly, cables seem to be one of the most common causes of these types
of problems.  It the cable was made poorly or stretched too much at some
point, there may be a short which will cause the offhook condition.

Finally, connect a standard analog telephone to that port and see if you
have any issues with offhook and dialtone.  If all is well with the ananlog
phone, then you can safely assume that the problem is your fax machine.  If
you have a spare fax, give it a try.  If you are in a business area, maybe
you can borrow a fax from a neighbor.

Finally, if you cannot locate a fax to test, here is a cheap ($30 after
rebate)  fax that may meet your needs for testing and actually may make a
great backup fax.
http://shop4.outpost.com/product/3353422?site=sr:SEARCH:MAIN_RSLT_PG

Thanks,
Steve Totaro