The Opengear IM4248 Infrastructure Manager is a network console server with 48 8P8C modular serial ports located on the front
They are three variations on the serial port pinout available: "Opengear Classic/Avocent/Equinox," and "Avocent/Cyclades," and "Cisco." The unit I have is an Opengear Classic model.
Serial port pinout
| pin
|
signal name
|
| 1
|
RTS (request to send)
|
| 2
|
DSR (data set ready)
|
| 3
|
DCD (data carrier detect)
|
| 4
|
RxD (receive data)
|
| 5
|
TxD (transmit data)
|
| 6
|
GND (signal ground)
|
| 7
|
DTR (data terminal ready)
|
| 8
|
CTS (clear to send)
|
A cable for the common Cisco console port
| Cisco pin
|
Cisco side signal name
|
wire color
|
Opengear classic side signal name
|
Opengear classic pin
|
| 1
|
no connect
|
-
|
RTS
|
1
|
| 2
|
DTR
|
white/orange
|
DSR
|
2
|
| 3
|
TxD
|
orange
|
RxD
|
4
|
| 5
|
GND
|
white/green
|
GND
|
6
|
| 6
|
RxD
|
white/blue
|
TxD
|
5
|
| 7
|
DSR
|
blue
|
DTR
|
7
|
| 8
|
no connect
|
-
|
CTS
|
8
|