Figure 27: Scg With Db-9 Ports; Figure 28: Scg With Rj-48 Ports; Table 17: Supported Scgs - Juniper T640 Hardware Manual

Copyright © 2013, Juniper Networks, Inc.
NOTE: Redundant SCGs must be the same model number, except during
upgrade.

Table 17: Supported SCGs

Name
SCG with DB-9 ports
(Figure 27 on page 49)
SCG with RJ-48 ports
(Figure 28 on page 49)

Figure 27: SCG with DB-9 Ports

Figure 28: 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.
These components are located on the SCG faceplate:
Three LEDs— , , and
OK FAIL
SCG online/offline button.
Two external clock inputs.
Chapter 3: T640 Router Hardware Component Overview
Model Number
SCG-T
SCG-T-EC
EXTERNAL CLOCK INPUTS
, that display the status of the SCG.
MASTER
First Supported Junos OS
Release
5.3
10.4
49