A86: Modems: AT command set

To: assembly-86@lists.ticalc.org
Subject: A86: Modems: AT command set
From: David Phillips <electrum@tfs.net>
Date: Fri, 20 Mar 1998 01:16:24 -0600
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org


I know this may be a little off topic, but...
I know you can give Hayes compatible modems AT commands like ATDT (dial).
But, how does the modem know the difference between an AT command and
regular data?  For example, I can go into my terminal program and type
ATDTxxx-xxxx to dial-up my isp, but when is see the "logon:" prompt, I can
type AT or whatever, and the modem doesn't take it as a command.  Why?
Could someone please explain how all the AT commands work (not the commands,
but how the modem receives them)?


Thanks,

David Phillips
electrum@tfs.net

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