Troubleshooting The T640 Sonet Clock Generators; Table 46: Scg Alarm Messages - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

Troubleshooting the T640 SONET Clock Generators

Problem

Table 46: SCG Alarm Messages

Alarm Type LCD Message
Red RED ALARM
Failure
RED ALARM
RED ALARM
SCG-number
RED ALARM
SCG-number
RED ALARM
SCG-number
RED ALARM
SCG-number
Yellow
YELLOW ALARM
SCG-number
YELLOW ALARM
SCG-number
YELLOW ALARM
SCG-number
212
The following alarms and LEDs indicate a problem with an SCG:
The yellow FAIL LED on the SCG faceplate is lit.
The green LED on the SCG faceplate is not lit.
OK
A red alarm indicates that an SCG, SCG voltage sensor, or the internal clock has failed.
A red alarm indicates that there are no SCGs online.
A red alarm indicates that loss of signal has occurred from an external clocking device
connected to the RJ-48
A yellow alarm indicates that an SCG is not online in a router with redundant SCGs or
that an SCG has been removed..
A yellow alarm indicates that a temperature sensor has failed.
In Table 46 on page 212, the text in the column labeled "LCD Message" appears in the
display of the craft interface. The text in the column labeled "CLI Message" appears in
the output from the
show chassis alarms
CLI Message
— SCG SCG-number RED ALARM
Failure
— No SCG Online RED ALARM
— SCG RED ALARM
Volt Snsr Fail SCG-number
— SCG RED ALARM
SCG-number
Ext-A LOS
—
SCG RED ALARM
SCG-number
Ext-B LOS
—
SCG RED ALARM
SCG-number
INT CLK Fail
Failure
—
SCG YELLOW ALARM
SCG-number
Not Online
—
SCG YELLOW ALARM
SCG-number
Removed
—
SCG YELLOW ALARM
SCG-number
TmpSnsr Fail
or port.
A B
command.
— SCG SCG-number
— No SCG Online
— SCG
Volt Sensor Fail
— SCG
External-A LOS
—
SCG
External-B LOS
—
SCG
Internal Clock
—
SCG
Not Online
—
SCG
Removed
—
SCG
Temp Sensor Fail
Copyright © 2013, Juniper Networks, Inc.