[asterisk-users] how to set iaxmodem receiving speed

[Tim Nelson]

----- Original Message -----
> Hi Steve,
> 
> you are telling me there is no way to set a particular speed on my
> iaxmodem in order to force the sender speed?
> I have some problems with a customer who gets malformed faxes even if
> no
> error occurs. Since I cannot tell the sender to lower its fax speed,
> my
> idea is to force my iaxmodem to a lower fixed speed so the sender is
> oblidged to negotiate at that speed (or lower, of course) without the
> customer could realize it, at least at first. :)
> There is no ATA in the middle (I'm using it for my tests but my
> customer
> does not have any), all faxes are received thru a primary channel to
> a
> bunch of iaxmodems. Sometimes some faxes are corrupted, that's why I
> thought to lower the speed. I could try to disable ECM but that's
> even
> harder to do (found nothing on internet).
> 

You're getting corrupted fax data and want to solve that problem by *disabling* ECM? That seems counter-intuitive to me...

How are your fax calls coming into your system (PSTN->???->Asterisk->IAXmodem->Hylafax)? If you have VoIP somewhere in the call path, you'll likely keep bashing your head on the table trying to fix problems that will never go away. Also, don't be afraid to recognize sometimes your side (as the receiver) is working perfectly well, and sometimes there just isn't anything you can do about senders on bad lines/sending over VoIP/etc. The quality of a fax session is only as good as the weakest link contained within that session, including the call path from sender to receiver.

--Tim