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APPENDIX C: CONNECTIVITY, TCP PORTS AND SERIAL I/O
Pin-out standards exist for DB9 and DB25 connectors. There are, however, no pin-out standards for serial connectivity using RJ-45
connectors. Most console servers, serially-managed servers, routers, switches and power devices adopt their own unique pin-outs.
Consequently, custom connectors and cables may be required to interconnect your console server.
C.1 SERIAL PORT PINOUTS
Console servers come with one to ninety-six serial connectors (notated SERIAL or SERIAL PORTS) for the RS-232 serial ports.
The RJ-45 serial ports are located on the rear panel of the rack-mount LES1700 series and LES1516A, LES1532A, LES1548A series).
The LES1516A, LES1532A, LES1548A and LES1600 models have Cisco Straight serial pinouts on their RJ-45 connectors.
The LES1700 has software-selectable Cisco Straight or Cisco Rolled RJ-45.
CISCO STRAIGHT RJ-45 PINOUT
Straight through RJ-45 cable to equipment such as Cisco, Juniper, SUN, and more.
TABLE C-1. CISCO STRAIGHT RJ-45 PINOUT
PIN SIGNAL
DEFINITION
DIRECTION
1
CTS
Clear to Send
Input
2
DSR
Data Set Ready
Input
3
RXD
Receive Data
Input
4
GND
Signal Ground
n/a
5
GND
Signal Ground
n/a
6
TXD
Transmit Data
Output
7
DTR
Data Terminal Ready
Output
8
RTS
Request to Send
Output
CISCO ROLLED RJ-45 PINOUT
Rolled RJ-45 cable to equipment such as Cisco, Juniper, SUN, and more.
TABLE C-2. CISCO ROLLED RJ-45 PINOUT
PIN SIGNAL
DEFINITION
DIRECTION
1
RTS
Request to Send
Output
2
DTR
Data Terminal Ready
Output
3
TXD
Transmit Data
Output
4
GND
Signal Ground
n/a
5
CTS
Clear to Send
Input
6
RXD
Receive Data
Input
7
DCD
Data Carrier Detect
Input
8
DSR
Data Set Ready
Input
1
8
1
2
3
4
5
6
7
8
CTS
DSR
RD
GND
GND
TD
DTR
RTS
1
2
3
4
5
6
7
8
1
8
