Cisco NCS 540 Hardware Installation Guide

StatusColorLED
Time core is synchronized to an external source including
IEEE1588.
GreenSYNC
System is in Synchronous Ethernet mode.Flashing Green
Acquiring state or Holdover: Time core is in acquiring
state or holdover mode.
Amber
Time core clock synchronization is disabled or in
free-running state.
Off
GNSS is not configured.
OffGNSS
GNSS Normal State. Self-survey is complete.Green
Power up. GNSS is not tracking any satellite.Red
Auto holdover.Amber
Learning state–normal. Self-survey is not completed.Flashing Green
System Fans LED
Cisco N540-24Q8L2DD-SYS has six fans at the back panel.
Table 9: Fan Assembly LED Descriptions
StatusColorLED
Fans are operating normally.GreenSTATUS
Single fan failure.Amber
More than one fan failure or a single PSU fan failure.Red
Fan tray is not receiving power.Off
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
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Appendix
System Fans LED

Cisco NCS 540 Specifications

General

Operating System	Cisco IOS XR
Memory	16 GB DDR4
Storage	128 GB SSD
Ports	Multiple 1G/10G/40G/100G Ethernet ports
Forwarding Capacity	800 Gbps
Redundancy	Redundant power supplies and fans
Form Factor	1 RU
Operating Relative Humidity	5% to 95% noncondensing
Input Voltage	100-240 VAC, 50-60 Hz
Power Supply	AC or DC
Processor	Quad-core 2.4 GHz