asterisk users - Nov 2004 - Problem with fax tone (CNG) from TxFax and busy detect

I'm losing call files in /var/spool/asterisk/outgoing because * isn't 
able to detect the busy signal.  The call file looks like this:

Channel: Zap/g2/3036701917
MaxRetries: 1000
RetryTime: 60
WaitTime: 45
Application: TxFAX
Data: <filename>.tiff|caller

Using the "|caller" parameter, TxFax injects the fax tone (CNG) onto
the
line.  With the CNG tone, asterisk is unable to detect the busy tones.

If I were to remove "|caller" then the receiving station wouldn't 
receive the CNG tone and possibly not direct the call to the fax machine.

Is there a way for * to detect busy tones while ignoring (filtering) the 
fax tones?

Thanks,

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

>I'm losing call files in /var/spool/asterisk/outgoing because *
isn't
>able to detect the busy signal.  The call file looks like this:
>
>Channel: Zap/g2/3036701917
>MaxRetries: 1000
>RetryTime: 60
>WaitTime: 45
>Application: TxFAX
>Data: <filename>.tiff|caller
>
>Using the "|caller" parameter, TxFax injects the fax tone 
>(CNG) onto the 
>line.  With the CNG tone, asterisk is unable to detect the busy tones.
>
>If I were to remove "|caller" then the receiving station
wouldn't
>receive the CNG tone and possibly not direct the call to the 
>fax machine.
>
>Is there a way for * to detect busy tones while ignoring 
>(filtering) the 
>fax tones?
>

I have a similar problem:
I dial out but no CNG signal is sent at all. It is as if the auto-dial
program never sees the line has been answered. It never calls the
application.
I set it up to dial my cell phone. I answer and nothing, dead. I hang up and
the script hangs up.
My call file is set up as yours.


John

Michael Welter wrote:
> Using the "|caller" parameter, TxFax injects the fax tone (CNG)
onto the
> line.  With the CNG tone, asterisk is unable to detect the busy tones.
> 
> If I were to remove "|caller" then the receiving station
wouldn't
> receive the CNG tone and possibly not direct the call to the fax machine.
> 
> Is there a way for * to detect busy tones while ignoring (filtering) the 
> fax tones?
There might be a way to patch asterisk to do this, but currently the 
only way that I know of is to use a PRI or other type of line that 
provides busy/answer/etc indications.