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echo: hs_modems
to: DAVE PETRUCCI
from: BOB STURGEON
date: 1997-06-03 10:52:00
subject: Re: Init Strings

Hi Dave ... on 2 Jun 97 you wrote,
 DP> > DB> Going by the standard AT command set, ATF1 would turn on-
 DP> > DB> line echo off (full duplex mode) while ATF0 should enable on
 DP> > DB> line echo --
 DP> > One thing that I have discovered ...  when you own a Logicode
 DP> > internal 33.6 modem, there is no such thing as a "standard AT
 DP> > command set"!  If as you say above, ATF1 turns on "line echo",
 DP> > you would think that there should be a way to turn it off, except
 DP> > for ATZ.  As I mentioned earlier,
 DP>       The Fn commands are modem specific...  for example.. on
 DP>       one of my old Zoom modems... F0 does nothing, while F1
 DP>       does... (just like yours)... but on a newer Zoom modem
 DP>       the Fn commands set the desired DCE rate (bps)...
In reading (or a better word would be translating the gibberish) found
in the file CIR33TXT, It would appear that the Cirrus Logic AT command
set defines the Fn command as:
     F0     Enables online echo
     F1     Disables online echo
 DP>       One usually things of the "standard AT command set" as those
 DP>       commands that are universal with all modems... ie..
 DP>       ATDT, ATZ, &C1, &C2, &D1, etc..etc..
Yes ... However, in searching the CIR33TXT file, I can find no reference
on how to set the DCE speed to a specific value.  Maybe once I can get
those docs translated into English I may find it :-)
Thanks again for your help.
Bye for now ... Bob
 * SLMR 2.1a *  
--- Maximus 3.01
---------------
* Origin: The BandMaster, Vancouver, B.C., Canada (1:153/7715)

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