NEC QX-S5500G Series - Led; System Status LED

Installation Guide
QX-S5500G Series Ethernet Switches
10. Appendix C Ports and LEDs
10-15
Pin
10BASE-T/100BASE-TX 1000BASE-T
Signal Specification Signal Specification
6
Rx-
Receive
BIDB-
Two directions B-
7
Non-data
-
BIDD+
Two directions D+
8
Non-data
-
BIDD-
Two directions D-
Table 10-13 Pin arrangement of MDI-X
Pin
10BASE-T/100BASE-TX 1000BASE-T
Signal Specification Signal Specification
1
Rx+
Receive
BIDB+
Two directions B+
2
Rx-
Receive
BIDB-
Two directions B-
3
Tx+
Transmission
BIDA+
Two directions A+
4
Non-data
-
BIDD+
Two directions D+
5
Non-data
-
BIDD-
Two directions D-
6
Tx-
Transmission
BIDA-
Two directions A-
7
Non-data
-
BIDC+
Two directions C+
8
Non-data
-
BIDC-
Two directions C-
10.3 LED
10.3.1 System status LED
System status LED shows the operating status of the switch.
Table 10-14 System status LED description
LED mark Status Description
SYS
Steady green
The switch is operating correctly.
Flashing green
(1 Hz)
The switch is performing power-on self test (POST).
Steady red
The switch has failed the POST or is faulty.
Flashing yellow
(1 Hz)
Some ports have failed to pass POST or are faulty.