on the left of each RJ-48 port, display the status of the external clock inputs links. The
other LEDs on the right of each port are not used.
NOTE: The external clock inputs on the SCG with DB-9 ports are not
functional.
Figure 14 on page 29 shows the LEDs on the SCG with RJ-48 ports.
Figure 14: SCG with RJ-48 ports
g006052
EXTERNAL CLOCK INPUTS
OK
Fail Master
Online/Offline button
Table 10 on page 29 describes the functions of the SCG LEDs. The LINK LED is not
applicable to the SCG with DB-9 ports.
Table 10: SCG LEDs
DescriptionStateColorLabel
SCG is online and is functioning
normally.
On steadilyGreenOK
SCG is not online or not
functioning normally.
Off
SCG has failed.On steadilyYellowFAIL
SCG is offline or functioning
normally.
Off
SCG is functioning as master.On steadilyBlueMASTER
SCG is not functioning as the
master.
Off
Link is online and active.On SteadilyGreenLINK
No link.Off
Related
Documentation
• T640 SONET Clock Generators (SCGs) Description on page 27
• Replacing a T640 SCG on page 277
29Copyright © 2017, Juniper Networks, Inc.
Chapter 3: Chassis Components and Descriptions
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