Panasonic KX-TD816 Installation Manual page 66

2.3 Connection
Serial Interface (RS-232C) Signals
Frame Ground: FG
Connects to 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 is held ON whenever DR (DSR) is ON.
Clear To Send: CS (CTS): (input)
An ON condition of circuit CS (CTS) indicates that the printer 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.
Data Set Ready: DR (DSR): (input)
An ON condition of circuit DR (DSR) indicates the printer is ready. Circuit DR (DSR) ON does
not indicate that communication has been established with the printer.
Signal Ground: SG
Connects to the DC ground of the unit for all interface signal.
Data Terminal Ready: ER (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. It is switched OFF
when the unit is OFF LINE.
Data Carrier Detect: CD (DCD): (input)
The ON condition is an indication to data terminal (DTE) that the carrier signal is being
received.
Programming Guide References
[800] SMDR Incoming / Outgoing Call Log Printout
[801] SMDR Format
[802] System Data Printout
[806-807] Serial Interface (RS-232C) Parameters
[990] System Additional Information
Features Guide References
Station Message Detail Recording (SMDR)
System Programming and Diagnosis with Personal Computer
66
General Installation