Chapter 4 Installation and Setup
Cajun P120 User’s Guide 23
Connecting to the Serial Ports
The Cajun P120 has two serial ports – one on the front panel for connecting a PC or
terminal, and one on the back panel of the unit for connecting a modem.
The RJ-45 port on the front panel of the Cajun P120, labeled Console, may be used
for configuration of the switch using the built-in Command Line Interface (CLI,
Terminal Emulation). The SLIP serial port, on the back panel of the Cajun P120,
may be used for out-of-band SNMP management, Telnet or a TFTP server.
Their settings are as follows
• Baud Rate - 9600 bps
• Character Size - 8
•Parity - None
• Stop Bit - 1
• Flow Control - None
The terminal connected to the serial port must be configured with the same
settings; this setting should work with any PC COM port over a DB-9 to RJ-45
connector.
* The above pinout reflects the functionality of the signals, as seen from the
Cajun P120.
Table 4.4 Pinout of the Serial Interface (RJ-45) and the Connection to SLIP Modem (D9)
RJ-45 PINS (front connector) D9 PINS (back connector)
1 – NC 1 – CDB
2 – RXDA 2 – RXDB
3 – TXDA 3 – TXDB
4 – CDA 4 – DTRB/REQB
5 – GND 5 – GND
6 – DTRA/REQA 6 – NC
7 – RTSA 7 – RTSB
8 – CTSA 8 – CTSB
9 – NC