Specifications

17
LOCAL FIBER 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 Fiber Mux-6.
104 BB 3 (16) Receive Data Serial digital data
output from the Local
Fiber Mux-6.
105 CA 4 (19) Request to Send A positive level to the
Local Fiber Mux-6
when data trans-
mission is desired.
106 CB 5 (13) Clear to Send A positive level from
the Local Fiber Mux-6
(if data transmission
is possible).
107 CC 6 (21) Data Set Ready A positive DC voltage
(+8V) from the Mux
indicating the unit is
powered.
109 CF 8 (12) Receive Line Signal A positive level from
Detector (Carrier the Mux except
Detect) when 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 power-
ing miniature
modems.
*Pin numbers in parentheses are for the secondary
channel available when using a channel-doubler cable.