A Macintosh Plus can run MacTerminal 2.0, but the new Macintosh Plus keyboard
cannot produce a "Break" in the same way.
Among others, users of Northern Telecom SL-1 PBX are affected by this change.
To work around the problem:
1. Use the 'Option' key on the new Macintosh Plus keyboard.
a. Break (0.2 sec): Option, Enter
b. Long Break (2 sec): Option, Shift, Enter
2. For short Break (0.2 sec), use the Apple Cluster Controller's "Attn"
on the Pull-Down-Keypad.
3. When using the OLD keyboard: use the Enter key on the Keyboard only.
(NOT on the Numeric Keypad):
a. 3278 mode: Long Break (2 sec): Shift, Enter
b. VT-100 mode:
1. Break (0.2 sec): Enter
2. Long Break (2 sec): Shift, Enter