Panasonic KX-TA624 Installation Manual page 34

2.13 Printer and PC Connection
Serial Interface (RS-232C) Signals
Frame Ground: FG
Connects the unit frame and the earth ground conductor of the AC power cord.
Transmitted Data: SD (TXD) . . . . . . . . . . . . . . . . . . . . . . (output)
Conveys signals from the unit to the printer. A "Mark" condition is held unless data or
BREAK signals are being transmitted.
Received Data: RD (RXD) . . . . . . . . . . . . . . . . . . . . . . . . (input)
Conveys signals from the printer.
Request to Send: RS (RTS) . . . . . . . . . . . . . . . . . . . . . . . (output)
This lead remains ON whenever DR (DSR) is ON.
Clear To Send: CS (CTS) . . . . . . . . . . . . . . . . . . . . . . . . . (input)
When the CS (CTS) circuit is ON, it indicates that the printer is ready to receive data from
the unit. The unit does not attempt to transfer data or receive data when the CS (CTS) circuit
is OFF.
Data Set Ready: DR (DSR) . . . . . . . . . . . . . . . . . . . . . . . (input)
When the DR (DSR) circuit is ON, it indicates the printer is ready. The DR (DSR) circuit
being ON does not indicate that communication has been established with the printer.
Signal Ground: SG
Connects the DC ground of the unit for all interface signals.
Data Terminal Ready: ER (DTR)
This signal line is turned ON by the unit to indicate that it is ON
LINE. The ER (DTR) circuit being ON does not indicate that communication has been
established with the printer. It is switched OFF when the unit is OFF LINE.
Data Carrier Detect: CD (DCD) . . . . . . . . . . . . . . . . . . . (input)
When ON, it indicates the data terminal (DTE) that the carrier signal is being received.
• Required System Programming
Section 4.2, System Programming
[800] SMDR RS-232C Communication Parameters
[801] SMDR Parameter
• Feature Reference
Section 3, Features
Station Message Detail Recording (SMDR)
2-18
Installation
. . . . . . . . . . . . . . . . . . (output)