Re: [hylafax-users] Core Technologies Differences between Hylafax and Winfax?

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

On 2003.09.17 06:41 Taboo Test wrote:
> Dear all,
>
>     Do Hylafax and Winfax use the same core technology for receiving
> and sending fax?

I'm not sure what you mean here.  All fax software and machines must 
conform to ITU-T.30 in order to be standards compliant.

As far as what technologies within T.30 are supported in WinFax versus 
HylaFAX, this most certainly depends on what modem is used and whether 
it is used in Class 1 or Class 2, but here are the capabilities of a 
WinFax receiver I have seen and which I've found to be common for 
WinFax:

Sep 03 15:34:09.25: [26389]: REMOTE best rate 14400 bit/s
Sep 03 15:34:09.25: [26389]: REMOTE max A4 page width (215 mm)
Sep 03 15:34:09.25: [26389]: REMOTE max unlimited page length
Sep 03 15:34:09.25: [26389]: REMOTE best vres 7.7 line/mm
Sep 03 15:34:09.25: [26389]: REMOTE best format 2-D MR
Sep 03 15:34:09.25: [26389]: REMOTE best 0 ms/scanline

This is the same as HylaFAX 4.1.7 except that HylaFAX also supports B4 
and A3 page width.  However, HylaFAX CVS plus some developmental 
enhancements will, in Class 1, support:

Sep 16 16:20:21.92: [ 2021]: REMOTE best rate 14400 bit/s
Sep 16 16:20:21.92: [ 2021]: REMOTE max A3 page width (303 mm)
Sep 16 16:20:21.92: [ 2021]: REMOTE max unlimited page length
Sep 16 16:20:21.92: [ 2021]: REMOTE best vres R16 x 15.4 line/mm
Sep 16 16:20:21.92: [ 2021]: REMOTE best format 2-D MMR
Sep 16 16:20:21.92: [ 2021]: REMOTE supports T.30 Annex A, ECM
Sep 16 16:20:21.92: [ 2021]: REMOTE best 0 ms/scanline

Which is an improvement in data format, resolution, and ECM support.

Procomm Plus which is now owned by Symantec can do Class 1 ECM, so I 
fully expect that technology to leak into WinFax soon, since Symantec 
owns them both.  These capabilities aren't particularly any different, 
though, than say Microsoft Fax.  The core difference between HylaFAX 
and any product like Microsoft Fax, Procomm Plus, or WinFax will be in 
the so-called stability.  There are probably going to be many fewer 
protocol bugs in HylaFAX than in the others... at least that's been my 
experience.

Lee.

____________________ HylaFAX(tm) Users Mailing List _______________________
 To subscribe/unsubscribe, click http://lists.hylafax.org/cgi-bin/lsg2.cgi
On UNIX: mail -s unsubscribe hylafax-users-request@xxxxxxxxxxx < /dev/null
 *To learn about commercial HylaFAX(tm) support, mail sales@xxxxxxxxxxxx*