T640 Sonet Clock Generators (Scgs) Leds; Figure 29: Scg With Rj-48 Ports - Juniper T640 Hardware Manual

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

50
NOTE: Junos OS Release 10.4 and later supports the external clock inputs
on the SCG with RJ-48 ports. The external clock inputs are not supported
on the SONET Clock Generator (SCG) with DB-9 ports.
For information about configuring external clock synchronization for T
Series routers, see Junos OS Administration Library for Routing Devices
For information about configuring an interface transmit clock, see the Junos
OS Network Interfaces Library for Routing Devices.
Two LEDs for each RJ-48 external clock input that display the status of the links.
T640 Hardware Component Overview on page 11
T640 SONET Clock Generators (SCGs) LEDs on page 50
Replacing a T640 SCG on page 278
Maintaining the T640 SCGs on page 185
T640 RJ-48 Connector Pinouts for the SCG EXTERNAL CLOCK INPUTS Ports on
page 450
T640 Component Serial Number Label Locations on page 454
Three LEDs, located on the SCG faceplate, display the status of the SCG.
Table 18 on page 51 describes the functions of the SCG LEDs. Two
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 29 on page 50 shows the LEDs on the SCG with RJ-48 ports.

Figure 29: SCG with RJ-48 ports

Online/Offline button
OK Fail Master
LINK
EXTERNAL CLOCK INPUTS
Copyright © 2013, Juniper Networks, Inc.
LEDs, located