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echo: hs_modems
to: JOHN RANGER
from: RICK COLLINS
date: 1997-11-11 14:47:00
subject: BUZY SIGNALS! The Final Chapter

Hi John,
In a message to Coridon Henshaw you wrote:
 CH>> init ATZ1
 CH>> Bink sends: 'ATZ1' Modem replies (echos back): 
 CH>> 'ATZ1'
 CH>> Notice that the modem never said OK, meaning that it hasn't
 CH>> processed the command.
 JR> I notice my new Mototola 28,8 reports back "ERROR" and still
 JR> carries out the command, so?
No it doesn't John.  There's something here you apparently don't understand.
When you type "Z1" to your modem _nothing_ gets printed on the screen until 
the modem echos the command.  So, when you type "Z", and see "Z" on your 
screen, it's there because the modem echoed it back.  That's what Coridon is 
saying.  So, what's really happening is this:
You send Z1 to your modem, and the modem echos Z1 to your screen.  That's 
_all_ that happens until you send a CR, by using the pipe symbol in Binkley 
(|).  The modem does not execute the string _until_ it receives the CR which 
signifies the end of the command string.
Your modem is returning "ERROR" at some point.  That's because the command 
string has not been preceeded by the AT "command identifier" and at some 
point Bink (perhaps in another command) has sent the CR.  The modem is 
returning ERROR _because_ it can't recognize the command string - there was 
no "Command introducer" - the AT.
You may chose to _think_  the modem is carrying out the command, and in 
answer to that I will simply suggest that since it's _you_ that had the 
problem in the first place, and _not_ us, perhaps you are mistaken in what 
you _think_ is happening.
Rick
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* Origin: The Warlock's Cave (1:163/215.39)

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