Figure 14: Scg With Rj-48 Ports; Table 10: Scg Leds - Juniper T640 Hardware Manual

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Copyright © 2017, Juniper Networks, Inc.
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

Online/Offline button
OK Fail Master
Table 10 on page 29 describes the functions of the SCG LEDs. The
applicable to the SCG with DB-9 ports.

Table 10: SCG LEDs

Label Color
OK Green
Yellow
FAIL
Blue
MASTER
Green
LINK
T640 SONET Clock Generators (SCGs) Description on page 27
Replacing a T640 SCG on page 277
Chapter 3: Chassis Components and Descriptions
EXTERNAL CLOCK INPUTS
State Description
On steadily SCG is online and is functioning
normally.
Off SCG is not online or not
functioning normally.
On steadily SCG has failed.
Off SCG is offline or functioning
normally.
On steadily SCG is functioning as master.
Off SCG is not functioning as the
master.
On Steadily Link is online and active.
Off No link.
LED is not
LINK
29