Re: flexfax: Q about elsa modem

["Dmitry Bely" <dbely@mail.ru>]

> i use an elsa microlink 56k basic with hylafax and the config file
> from their webpage. everything runs good but i only get 1D connections.
> 
> the config files uses Class2.0.
> i have no use2d: no anywhere
> no corrupt info files
> 
> i called elsa support and they do not know wether their product
> supports 2D encoding or not!?!!
> 
> anyone else knows?

You can easily get this info yourself. Issue in any terminal program (e.g. minicom) the following commands:

AT+FCLASS=2.0;+FCC=?

You will get something like
(0,1),(0-5),(0-2),(0-2),(0,1),(0,1),(0),(0-7)
OK
(That's what my Zyxel 1496e responded).

The parameters above are
VR,BR,WD,LN,DF,EC,BF,ST

The fifth parameter (DF) is the range of DCE-supported data compression methods according to the following table:

DF    Data Compression Format    0    1-D Modified Huffman (T.4)
	                        *1    2-D Modified Read (T.4)
	                        *2    2-D Uncompressed Mode (T.4)
	                        *3    2-D Modified Modified Read (T.6)

So if your modem returns just (0), 1-D is the only compression format supported.

Hope to hear from you soon,
Dmitry