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Air Filter Description
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TX Matrix Cables Overview
Fiber-optic Array Cables
Copyright © 2010, Juniper Networks, Inc.
When the TX Matrix router is operating normally, the fans function at lower than full
speed. The host subsystem constantly monitors the temperature detected by sensors
on the midplane and TX Matrix router components. If a fan fails or the ambient
temperature rises above a threshold, the host subsystem adjusts the speed of the
remaining fans to maintain proper cooling and keep the temperature within the acceptable
range. If the TX Matrix router temperature exceeds the acceptable maximum, the TX-CB
turns off the power supplies. A red alarm is triggered when a fan fails, and a yellow alarm
is triggered when a fan tray is removed.
CAUTION: To maintain proper cooling, do not operate the TX Matrix router
with the rear fan tray removed for more than 1 minute.
Air filters for both the front and rear fan trays help keep dust and other particles from
entering the cooling system. The TX Matrix router has one front air filter and one rear air
filter. The air filter is hot-insertable and hot-removable.
Fiber-optic Array Cables on page 49
Ethernet cables on page 50
DB-9 Serial Cables on page 50
The fiber-optic array cables connect the switching planes of the T640 routers to the
TX Matrix router by connecting the T640-SIBs to the TX-SIBs. Cable lengths from 3 m
to 100 m are supported to accommodate both centralized and distributed TX Matrix
configurations. The fiber-optic array connector is shown in Figure 26 on page 50.
Chapter 3: TX Matrix Hardware Components Overview
49
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