Black Box MD1640A, MD1641A manual Break Atcr

CHAPTER 5: Command Mode

When this is done, the modem escapes to Command Mode, executes the command (if any), and then remain in Command mode. For example, to hang up the modem at the end of a call, enter +++ATH and hit RETURN. There is no need to incorporate pauses before and after the plus signs, as done in earlier modems.

BREAK AT<CR>

The Series II Modem provides an alternative Escape method, using a Break signal as the Escape Code. The Break signal allows the start-stop DTE (data terminal equipment) to signal the modem without loss of character transparency. With this method, a BREAK signal is used instead of the three plus signs. The BREAK is followed by the letters A and T, up to 60 command characters, and RETURN. When this is done, the modem executes that command, but remains in On-Line mode unless the command was to hang up and/or reset the modem (an H or Z), in which case the modem would be in the Command Mode after ex- ecuting that command.

Escape Sequence Options - Entering Command Mode While On-Line %E

As mentioned, the default escape sequence setting is for the modem to respond to the +++ escape method. Optional settings are for the modem to respond to the Break method, for the modem to respond to either the +++ or the Break Methods, for the modem to ignore both methods and not escape, for the modem to respond with no "OK" to

+++, and for the modem to respond with "OK" to +++. The %E com- mand is used to select these options, as follows:

%E0	=	Modem Won’t Escape
%E1	=	+++ AT<CR> Method (default)
%E2	=	Break Method
%E3	=	Either +++ or Break Methods
%E4*	=	No "OK" Response to +++
%E5*	=	"OK" Response to +++

*The %E4 and %E5 commands enable or disable an "OK" response, which is required by some software packages during an escape sequence.

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