T640 Craft Interface Overview; Table 18: Scg Leds - Juniper T640 Hardware Manual

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T640 Craft Interface Overview

Copyright © 2013, Juniper Networks, Inc.
Table 18 on page 51 describes the functions of the SCG LEDs. The
applicable to the SCG with DB-9 ports.

Table 18: SCG LEDs

Label Color
OK Green
Yellow
FAIL
Blue
MASTER
Green
LINK
T640 SONET Clock Generators (SCGs) Description on page 48
Replacing a T640 SCG on page 278
Maintaining the T640 SCGs on page 185
T640 LED Overview on page 200
Troubleshooting the T640 SONET Clock Generators on page 212
T640 Component Serial Number Label Locations on page 454
T640 Craft Interface Description on page 52
T640 Craft Interface Alarm LEDs and ACO/LT Button on page 52
T640 Craft Interface LCD and Navigation Buttons on page 53
T640 Craft Interface Host Subsystem LEDs on page 54
T640 Craft Interface SIB LEDs on page 55
T640 Craft Interface FPC LEDs and Online/Offline Buttons on page 55
Chapter 3: T640 Router Hardware Component Overview
LINK
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
51