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echo: locsysop
to: Paul Edwards
from: David Drummond
date: 1996-02-03 13:54:20
subject: USR Courier

Paul, at 09:13 on Feb 02 1996, you wrote to David Drummond ...

DD>> The modem will commmunicate with the computer at what ever 
DD>> comport speed the computer sends out (AT command) HOWEVER 
DD>> upon an incomming call it will revert the port speed to the 
DD>> speed stored in the NVRAM.  This speed was set by the last 
DD>> AT&W command or equiv (SDL write).

PE> It makes NO SENSE WHATSOEVER, do be sending the word "OK" to
PE> you at 38400, yet the word "RING" at 57600.  No terminal can
PE> possibly be set to both baud rates at the same time.

Terminals do not answer the phone generally.

DD>> I am unable to locate this in the docs - but I KNOW I read 
DD>> it somewhere.

PE> No, what you actually read (somewhere) is that IN THE 
PE> ABSENCE of an AT command, an incoming "RING" will be sent to 
PE> the terminal at the speed of the last AT&W. The modem 
PE> doesn't know what the speed is, because it hasn't received an 
PE> AT command.  The speed of the AT&W is PERFECTLY FAIR, and a 
PE> BLOODY GOOD GUESS.  However, the moment you get an AT 
PE> command, you KNOW what the REAL speed is, and you should 
PE> adapt to that rate.  As it does, for everything except the 
PE> RING.

And ALL incomming data as a result of that ring.

I have seen nothing mentioning the speed of the last AT command.

David
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