Cisco 5520 Deployment Manual page 11

Network Link LED Indicator
The network LED is located on the front panel and indicates if any of the on-board networking ports are connected and operating.
Table 8: Network Link LED Indicator
LED Indicator Color
Single Color
Green
Front Panel KVM Break-out Connector
A single female connector provides access to video, two USB ports for keyboard and mouse, and an RS-232C console serial port.
An external breakout connector to industry standard interfaces is required. The following figure shows an example cable.
The interfaces for the cable are:
1 Front panel KVM/Console connector
2 DB9 serial port connector
3 Dual Type-A USB 2.0 connectors
4 DB15 Video connector
Function
Network Link Status
State
Off
Green On
Green Blinking
Decode
Undefined
Link on any of the ports, but no activity
Activity on any of the ports
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