Juniper MX480, Hardware Manual

Page: 37 / 420

•
MX Series Router Interface Names
MX480 Craft Interface Description
The craft interface allows you to view status and troubleshooting information at a glance
and to perform many system control functions. It is hot-insertable and hot-removable.
The craft interface is located on the front of the router above the card cage and contains
LEDs for the router components, the alarm relay contacts, and alarm cutoff button. See
Figure 4 on page 37 .
Figure 4: Front Panel of the Craft Interface
NOTE: At least one SCB must be installed in the router for the craft interface
to obtain power.
Alarm Relay Contacts on the MX480 Craft Interface
The craft interface has two alarm relay contacts for connecting the router to external
alarm devices (see
Figure 5 on page 37 ). 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 on the upper right of the craft interface.
Figure 5: Alarm Relay Contacts
Alarm LEDs and Alarm Cutoff/Lamp Test Button on the MX480 Craft Interface
Two large alarm LEDs are located at the upper right of the craft interface. The circular
red LED lights to indicate a critical condition that can result in a system shutdown. The
triangular yellow LED lights to indicate a less severe condition that requires monitoring
or maintenance. Both LEDs can be lit simultaneously.
A condition that causes an LED to light also activates the corresponding alarm relay
contact on the craft interface.
37 Copyright © 2019, Juniper Networks, Inc.
Chapter 1: Overview