Panasonic KX-TA824, Installation Manual

Page: 64 / 88

2.8 Connecting Peripherals
64 Installation Manual
For connecting a PC/printer with a 25-pin RS-232C connector
RS-232C Signals
• Receive Data (RXD): …(input)
Carries signals from the printer or the PC to the PBX.
• Transmit Data (TXD): …(output)
Carries signals from the PBX to the printer or the PC. Stays in "Mark" status unless data or
BREAK signals are being transmitted.
• Data Terminal Ready (DTR): …(output)
This signal line is turned ON by the PBX to indicate that it is ON LINE. Circuit ER (DTR) ON
does not indicate that communication has been established with the printer or the PC. It is
switched OFF when the PBX is OFF LINE.
• Signal Ground (SG)
Connects to the DC ground of the PBX for all interface signals.
• Data Set Ready (DSR): …(input)
An ON condition of circuit DR (DSR) indicates that the printer or the PC is ready. Circuit DR
(DSR) ON does not indicate that communication has been established with the printer or the
PC.
• Request To Send (RTS): …(output)
This is held ON whenever DR (DSR) is ON.
• Clear To Send (CTS): …(input)
An ON condition of circuit CS (CTS) indicates that the printer or the PC is ready to receive
data from the PBX. The PBX does not attempt to transfer data or receive data when circuit
CS (CTS) is OFF.
• Frame Ground (FG)
Connects to the unit frame and the ground conductor of the AC cord.
• Data Carrier Detect (DCD): …(input)
An ON condition of circuit CD (DCD) indicates the data terminal (DTE) that the carrier signal
is being received by.
Feature Manual References
1.1.112 Station Message Detail Recording (SMDR)
PBX PC/Printer
Circuit Type
(EIA)
Signal
Name
Pin No.
Signal
Name
Circuit Type
(EIA)
BB RD (RXD) 2
BA SD (TXD) 3
CD ER (DTR) 4
AB SG 5
CC DR (DSR) 6
CA RS (RTS) 7
CB CS (CTS) 8
1 FG AA
3 RD (RXD) BB
2 SD (TXD) BA
20 ER (DTR) CD
7 SG AB
5 CS (CTS) CB
6 DR (DSR) CC
CF 8 CD (DCD)
Pin No.