Re: [hylafax-users] Apparent page size mismatch on incoming fax

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Mark Hellman wrote:

> Hylafax reports on an incoming fax:
>      Page: ISO A4
> but the width of attached PDF is always 215.2mm and the length is usually
> variable, ranging from 292.9 to 296.1mm.
>
> The size of ISO A4 is 210×297 mm, while 215.2mm is closer to the width of
> "Letter". 
>  

Page widths in fax are fixed.  Most faxes are going to be 1728 pixels 
wide in 215 mm for normal, fine, and superfine resolutions (which means 
8 pixels per mm or 204 dpi), and that's fixed by the fax protocol.  T.30 
(Table 2 Note 10) refers to this as "ISO A4, North American Letter and 
Legal".  So to be consistent with the other two page *width* sizes (ISO 
B4 and ISO A3 - both of which are rarely used) we just call it "ISO A4".

That said, the information to which you're referring "Page: ISO A4" in 
your received fax notification is actually determined (against "Letter" 
or "Legal") from the page *length* and not the width.  As A4, Letter, 
and Legal all use the same width setting they are distinguished by the 
length. So in other words, when it says "ISO A4" it means that the page 
length was closer to 297mm than it was to 279mm (Letter's length), and 
it was.

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@xxxxxxxxx*