Panasonic KX-NS1000 Installation Manual page 185

For connecting a printer/PC with a 25-pin RS-232C connector
PBX (9-pin)
Circuit Type Signal
(EIA) Name
BB RD (RXD)
BA SD (TXD)
CD ER (DTR)
AB SG
CC DR (DSR)
CA RS (RTS)
CB CS (CTS)
RS-232C Signals
•
Receive Data (RXD):...(input)
Conveys signals from the printer or the PC.
•
Transmit Data (TXD):...(output)
Conveys signals from the unit to the printer or the PC. A "Mark" condition is held unless data or BREAK
signals are being transmitted.
•
Data Terminal Ready (DTR):...(output)
This signal line is turned ON by the unit 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 unit is
OFF LINE.
•
Signal Ground (SG)
Connects to the DC ground of the unit for all interface signals.
•
Data Set Ready (DSR):...(input)
An ON condition of circuit DR (DSR) indicates 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 lead 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
unit. The unit 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 earth ground conductor of the AC power cord.
USB Interface for Uninterruptible Power Supply (UPS) and USB Memory
Device
The PBX is equipped with a USB 2.0 interface. This interface provides communication between the PBX and
user-supplied devices such as a UPS or USB memory device.
Using a USB memory device
A USB memory device can be used to backup and restore the system data of the PBX.
The PBX supports USB memory devices that meet the following specifications:
•
File system: FAT
•
Maximum capacity: 32 GB
Pin No.
2
3
4
5
6
7
8
4.10 Connection of Peripherals
Printer/PC (25-pin)
Signal
Pin No.
Name
1 FG
3 RD (RXD)
2 SD (TXD)
20 ER (DTR)
7 SG
5 CS (CTS)
6 DR (DSR)
4 RS (RTS)
Circuit Type
(EIA)
AA
BB
BA
CD
AB
CB
CC
CA
Installation Manual 185