Juniper T640 Hardware Guide

The upper set of ports, labeled HOST 0, connects to the Routing Engine in slot RE0; and
the lower set, labeled HOST 1, connects to the Routing Engine in slot RE1. Each set includes
the following ports:
•
ETHERNET—Connects the Routing Engine through an Ethernet connection to a
management LAN (or any other device that plugs into an Ethernet connection) for
out-of-band management. The port uses an autosensing RJ-45 connector to support
both 10- and 100-Mbps connections.
•
One small LED on the upper left edge of the ETHERNET port, labeled ACT, indicates
whether traffic is passing through the port.
•
One small LED on the lower left edge of the ETHERNET port indicates the connection
in use: the yellow LED lights for a 10-Mbps connection, and the green LED lights for
a 100-Mbps connection.
NOTE: When an RE-C1800 is installed, the connection LED is always
yellow for both a 10-Mbps connection and 100-Mbps connection.
•
CONSOLE—Connects the Routing Engine to a system console through an RS-232
(EIA-232) serial cable.
•
AUXILIARY— Connects the Routing Engine to a laptop, modem, or other auxiliary device
through an RS-232 (EIA-232) serial cable.
Alarm Relay Contacts
The CIP has two alarm relay contacts for connecting the router to external alarm devices.
Whenever a system condition triggers either the red or yellow alarm on the craft interface,
the alarm relay contacts are also activated. The alarm relay contacts are located below
the Routing Engine ports. The terminal blocks that plug into the alarm relay contacts are
supplied with the router. They accept wire of any gauge between 28-AWG and 14-AWG
(0.08 and 2.08 mm
2
), which is not provided. Use the gauge of wire appropriate for the
external device you are connecting.
Related
Documentation
T640 Hardware Component Overview on page 13•
• Replacing the T640 CIP on page 267
• T640 Component Serial Number Label Locations on page 486
• T640 Routing Engine Interface Cable and Wire Specifications on page 145
• T640 RJ-45 Connector Pinouts for the Routing Engine ETHERNET Port on page 146
• T640 DB-9 Connector Pinouts for the Routing Engine AUXILIARY and CONSOLE Ports
on page 146
21Copyright © 2017, Juniper Networks, Inc.
Chapter 3: Chassis Components and Descriptions

Juniper T640 Specifications

General

Brand	Juniper
Model	T640
Category	Network Router
Language	English