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A: Technical Specifications and Pinouts
Serial Ports
The IRU and the optional router modules have 9-pin serial interface connectors. These ports are
for console interface and are capable of transferring data at rates as high as 230 kbps. Other
features of the ports include the following:
• Programmable data, parity, and stop bits
• Programmable baud rate and modem control
Figure A-3 shows a serial port.
Figure A-3 Serial Port Connector
Pin 7
Request to
Send (RTS)
Pin 3
Transmit
Data (TXD)
Pin 2
Receive Data
(RXD)
Pin 4
Data Terminal
Ready (DTR)
(not used)
Pin 5
Ground
Pin 9
Ringing Indicator (R
(not used)
Pin 8
Clear to Send
(CTS)
Pin 6
Data Set
Ready (DSR)
(not used)
in 1
ata Carrier
etect (DCD)
not used)
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