Rs-232C Signals - Panasonic KX-TVS95 Installation Manual

2.7 TERMINAL CONNECTION
Table 2-3 Pin Configuration of the RS-232C
Pin
Number
7
8
20
2.7.3

RS-232C Signals

Frame Ground (FG)
Connects an external ground to the unit frame, usually the ground pin of the AC power
cord.
Transmitted Data (TXD)—output
Conveys signals from the unit to the terminal/printer. A "mark" condition is held unless
data or BREAK signals are being transmitted.
Received Data (RXD)—input
Conveys signals from the terminal/printer to the unit.
Request To Send (RTS)—output
This lead is held on whenever DSR is on.
Signal Ground (SG)
Connects to the DC ground of the unit for all interface signals.
Data Terminal Ready (DTR)—output
This signal line is turned on by the unit to indicate that it is RS-232C on-line. Circuit DTR
ON does not indicate that communication has been established with the terminal/printer.
It is switched off when the unit is RS-232C off-line.
42 Installation Manual
Signal Name
SG Signal Ground
DCD Data Carrier Detect
DTR Data Terminal Ready
Circuit Type
RS-232C CCITT
AB 102
CF 109
CD 108.2