Tandy DCM212 Operation Manual page 79

Appendix
B
Data
line
monitoring
The
DCM
212 can be used
to
monitor a
data
line
up
to
1200 bps
as
shown
in
the
figure
below.
To accomplish
this
monitoring
mode,
the
Modem's
carrier
transmitter
should be turned
off
and
loss
of
carrier
condition should be ignored.
For
originate
mode,
input:
AT CO S10=255 D
(
ENTER
j
For answer mode,
input:
AT
CO S10-255
A (ENTER)
@©
j i
..j
Computer
Duplex
Jack
fo
300- or 1200-bps
Modem
Terminal
V
©©
Computer
73