Re: [hylafax-users] Ensuring ECM mode is on

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Tommaso Cucinotta wrote:
> I'd like to know how to ensure that hylafax is using ECM (T30/A) while 
> sending a fax.
>
> AFAIU, setting the modem in Class 1 mode, allows for most of the work 
> to be done in software by hylafax, so this is what I did. In fact, in 
> my /etc/hylafax/config.ttyUSB0, I have:
>
>   ModemType:        Class1.0    # use this to supply a hint
>
> Also, I added the following lines to the file, in order to enable ECM:
>
>   Class1ECMSupport:    Yes        # enable T.30-A ECM support
>   Class1PersistentECM:    Yes        # to continue to correct while in 
> ECM
>   Class1ECMFrameSize:    256        # image frame size in ECM protocol
>
> I'd like to know whether this is all that is needed, in order to 
> ensure that ECM is being used during transmission of a fax (assuming 
> that the receiver is properly capable and configured for handling 
> ECM), and whether the implementation within hylafax of the ECM add-on 
> is complete, or there is anything missing, or whether I could expect 
> to run into any other issues (quite a newbie with hylafax). 

Yes, you got it.  For what it's worth those configuration options are 
the default settings.  ECM is enabled by default.

So as long as the receiver supports ECM it will get used.  The session 
log should make this apparent.

Thanks,

Lee.


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