T640 Sonet Clock Generators (Scgs) Overview; T640 Sonet Clock Generators (Scgs) Description; Table 16: Lcc-Cb Leds - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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T640 SONET Clock Generators (SCGs) Overview

T640 SONET Clock Generators (SCGs) Description

48

Table 16: LCC-CB LEDs

Label Color
Blue
MASTER
–
FAIL Yellow
–
Green
OK
–
The LEDs located next to each port indicate its status. The ports and the port LEDs are
not currently supported for the T640 router.
T640 Hardware Component Overview on page 11
T640 Host Subsystem Description on page 32
T640 Control Boards Description on page 43
T640 LCC-CB Description on page 46
Troubleshooting the T640 Host Subsystem on page 213
Troubleshooting the T640 Control Board on page 214
T640 SONET Clock Generators (SCGs) Description on page 48
T640 SONET Clock Generators (SCGs) LEDs on page 50
The SONET Clock Generators (SCGs) provide 19.44-MHz Stratum 3 clock signal for the
SONET/SDH interfaces on the router. One SCG is shipped as part of the standard router
configuration, but up to two SCGs can be installed to provide redundancy. SCGs are
installed into the upper rear of the chassis in the slots labeled
Backup SCGs are hot-removable and hot-insertable. Master and nonredundant SCGs
are hot-pluggable.
The router supports the SCGs in
State Description
On steadily LCC-CB is functioning as the master.
Off LCC-CB is functioning as the backup.
On steadily LCC-CB has failed.
Off No faults have been detected on the LCC-CB.
On steadily LCC-CB is online and is functioning normally.
Blinking LCC-CB is powering up, but not online.
Off LCC-CB is offline.
Table 17 on page 49.
and .
SCG0 SCG1
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