18
LOCAL MUX-6
Table 3-1. Sub-Channel Connector Pin Assignment.
CCITT
EIA
Pin
Signal Name
Description
V.24
RS-232C
No.
101
AA
1
Protective Ground
Chassis ground. May be
isolated from signal
ground.
102
AB
7
Signal Ground
Common signal and DC
power-supply ground.
103
BA
2 (14)
Transmit Data
Serial digital data from a
terminal or other source
into the Local Mux-6.
104
BB
3 (16)
Receive Data
Serial digital data output
from the Local Mux-6.
105
CA
4 (19)
Request to Send
A positive level to the
Local Mux-6 when data
transmission is desired.
106
CB
5 (13)
Clear to Send
A positive level from the
Local Mux-6 (if data
transmission is possible).
107
CC
6 (21)
Data Set Ready
A positive DC voltage
(+8V) from the Local
Mux-6 indicating the unit
is powered.
109
CF
8 (12)
Receive Line
A positive level from the
Signal Detector
Local Mux-6 except when
(Carrier Detect)
either a sync loss occurs
or remote loopback is
performed.
—
—
9
+8 volts
These signals are
10
-8 volts
reserved for data-set
testing and for powering
miniature modems.
NOTE: Pin numbers in parentheses are for the secondary channel
available when using a channel-doubler cable.
