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From: hrs1@cbnewsi.att.com (herman.r.silbiger)
Newsgroups: comp.dcom.fax
Subject: Re: Gray scales in a fax card??
Summary: gray scale
Keywords: fax,gray
Message-ID: <1990Dec22.230350.1588@cbnewsi.att.com>
Date: 22 Dec 90 23:03:50 GMT
References: <1990Dec22.183648.13079@cbnewsj.att.com>
Organization: AT&T Bell Laboratories
Lines: 18

In article <1990Dec22.183648.13079@cbnewsj.att.com>, apb@cbnewsj.att.com (Amrit Bains) writes:
> 
> In connection with PC fax cards does anyone know if there is something
> known as gray scales for the cards.
> 
>

Many standalone fax terminals advertize that they provide up to 16 levels of
gray scale.  However, this is done by using the NSF (Non-Standard Facility) 
field, and is thus possible only if the called machine and calling machine
were made by tye same manufacturer, and both use the same option.

The topic of gray scale is under study in CCITT, and I expect that when a
suitable coding scheme is agreed on, it will be added to fax.

Herman Silbiger
reply to: hsilbiger@attmail.com