D14128.02—NOVEMBER 2008
36
Codec C90
System Integrator Guide
Contents Introduction Getting Started Interfaces About the API xConfiguration xCommand xStatus Cameras Appendices Contact us
Connecting to the codec, cont...
Hardware & Cabling (RS-232)
The pin outs for the RS-232 are defined in the tables to the right.
Observe that the DTE (Data Terminal Equipment), could be a PC or
any other device capable of serial communication.
Cable. A straight-through cable should be used between the
TANDBERG RS-232 port and the DTE. The lower table shows the
recommended cable-wiring scheme when connecting the TANDBERG
Codec C90 to a PC through RS-232.
DTR and RTS are ignored. DSR, CD, and CTS are always asserted,
while RI is not used.
Troubleshooting (RS-232)
If communication cannot be established between the PC/terminal and
the TANDBERG Codec data port, the following should be checked:
Verify that the serial cable is a straight-through 9-pin to 9-pin 1.
cable.
Confirm that the configuration of the PC/terminal’s serial RS-232 2.
port is identical to the configuration of the TANDBERG RS-232
port.
Verify that the PC/terminal’s serial RS-232 port is working properly 3.
by connecting it back-to-back to another PC/terminal and send
characters in both directions.
COM port (RS-232)
Pin Signal name
Direction
1 Carrier detect, CD
From DCE
2 Receive data, RXD
From DCE
3 Transmit data, TXD
To DCE
4 Data terminal ready, DTR
From DCE
5 Signal GND
6 Data set ready, DSR
From DCE
7 Ready to send, RTS
To DCE
8 Clear to send, CTS
From DCE
9 Ring indicator, RI
From DCE
Cable wiring (RS-232) TANDBERG DCE <-> PC
TANDBERG DCE 9 pin Direction PC DTE, 9 pin
1 CD
—> 1 CD
2 RD
—> 2 RD
3 TD
<—
3 TD
4 DTR <—
4 DTR
5 GND <—> 5 GND
6 DSR —> 6 DSR
7 RTS <— 7 RTS
8 CTS —> 8 CTS
9 RI —> 9 RI
