Scg Components; Figure 11: Scg With Db-9 Ports; Figure 12: Scg With Rj-48 Ports - Juniper T4000 Hardware Manual

SCG Components

Copyright © 2018, Juniper Networks, Inc.
The SCG with DB-9 ports is shown in

Figure 11: SCG with DB-9 Ports

The SCG with RJ-48 ports is shown in

Figure 12: SCG with RJ-48 ports

Online/Offline button
OK Fail Master
Each SCG consists of the following components:
19.44-MHz Stratum 3 clock.
Field-programmable gate array (FPGA) that performs multiplexing of clock sources.
SCG online/offline button, located on the SCG faceplate.
Two external clock inputs.
NOTE: The external clock ports are not supported on the SCG with DB-9
ports.
For information about configuring external clock synchronization for T Series routers,
see the Junos OS Administration Library.
For information about configuring an interface transmit clock, see the Junos OS Network
Interfaces Library for Routing Devices.
Three LEDs— , , and
OK FAIL
status of the SCG.
Chapter 3: Chassis Components and Description
Figure 11 on page 21.
Figure 12 on page
EXTERNAL CLOCK INPUTS
, located on the SCG faceplate, that display the
MASTER
21.
21