[asterisk-users] FAX thru TDM400p

Joe Acquisto joea at j4computers.com
Fri Apr 6 06:33:02 MST 2007

AFAIK, the FAX targets are normal FAX machines, on the PSTN.

What happens is, there appears to be a dial out, and a FAX negotiation, but it always fails.

joe a.

"Bryan M. Johns" <bryan at sheltonjohns.com> Wrote: 4/6/2007 8:49 AM:
> Is your carrier delivering service via a TDM circuit?
> It has been our experience that you will get far more reliable fax  
> performance via the method you describe (analog device terminated to  
> a port on a FXS line card) than attempting to use an ATA on the LAN.   
> However, if your carrier is a SIP or IAX trunking provider, your  
> reliability concerns are on the other side of your SIP switch.
> Bryan Johns
> Partner
> Shelton | Johns
> 1805 Old Alabama Road
> Suite 200
> Roswell, GA 30076
> Office: 678.248.2637
> FindMe: 678.229.1809
> Email: bryan at sheltonjohns.com 
> On Apr 6, 2007, at 8:39 AM, Joe Acquisto wrote:
>> There seem to have been many discussions about this, so sorry if  
>> this is boring.
>> Can one connect a "standard" fax machine (or fax modem) to an  
>> analog port on a TDM400p (as if it were an analog phone, say) and  
>> expect it to work reliably?
>> For sending, that is.  Detecting and "routing" the call is another  
>> subject (for me).
>> Seems it "should", but does not.  At least not for me.
>> joe a.
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