Radio Shack TRS-80 Modem II Operation Manuals page 37

Appendix
C/Operatlonal Flowchart
C
KE)
CLEAR AMD
DEFAULT
MEMORY
DELAY
3
SECONDS
GX
WARM RESTART J
DELAY
3.0
SECONDS
MODEM-
ON HOOK
TX ENABLE"
OFF
RING
DETECT' READY
MUTE - OFF
FILTERS- TEST
TX ENABLE - DN
©"
MUTE
=
OFF
MODEM" OFF HOOK
DELAY
2.0
SECONDS
TX ENABLE
-ON
\
AUTOMATIC MODE
) [—
f
|
\—
DELAY
0.3
SECONDS
SET FILTERS
TO ANSWER
SET FILTERS
TO ORIGINATE
CLEAR RX
SPACE
TIMER
B
r*-
31