asterisk users - Nov 2004 - txfax problem?

In my dial plan, I have

exten => 160,1,txfax(${FILENAME})

When I dial 160 from a fax machine, I hear a broken dial tone.  The 
processor utilization goes to 100%, and the following pair of messages 
is displayed at the console:

Slow carrier up
Slow carrier down

This pair of messages repeats until I push the "Start" key on the fax.
At this point things return to normal and the fax is sent to the machine.

Is this how it should work?  I'm using asterisk-1.0.2 and spandsp-0.0.1k

Thanks,
Mike


-- 
Michael Welter
Introspect Telephony Corp.
Denver, Colorado US
+1.303.674.2575
mike@introspect.com
www.introspect.com

Michael Welter wrote:
> In my dial plan, I have
>
> exten => 160,1,txfax(${FILENAME})
>
> When I dial 160 from a fax machine, I hear a broken dial tone.  The 
> processor utilization goes to 100%, and the following pair of messages 
> is displayed at the console:
100% CPU utilisation is not normal, unless you have a 16MHz 386 
processor. :-)
>
> Slow carrier up
> Slow carrier down
>
> This pair of messages repeats until I push the "Start" key on the
fax.
> At this point things return to normal and the fax is sent to the machine.
>
> Is this how it should work?  I'm using asterisk-1.0.2 and
spandsp-0.0.1k
It may be the settings of your FAX machine. Some won't go into receive 
mode when they are the caller, unless special action is taken. Was there 
any document in the FAX machine's send tray? Some refuse to receive 
until they have finished sending. When I call into txfax with a fax 
machine the machine receives OK.

Steve