Mx104 Modular Interface Card (Mic) Overview; Front-Pluggable Mics; Figure 8: Cooling System And Airflow In An Mx104 Router - Juniper MX104 Hardware Manual

MX104 3D Universal Edge Router Hardware Guide
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MX104 Modular Interface Card (MIC) Overview

Front-Pluggable MICs

16

Figure 8: Cooling System and Airflow in an MX104 Router

The cooling system components work together to keep all router components within the
acceptable temperature range. The chassis monitors the temperature of the router
components. When the router is operating normally, the fans function at lower than full
speed. If a fan fails or the ambient temperature rises above a threshold, the speed of the
remaining fans is automatically adjusted to keep the temperature within the acceptable
range. If the ambient maximum temperature specification is exceeded and the system
cannot be adequately cooled, the Routing Engine shuts down the system by disabling
output power from each power supply.
Preparing the Site for the MX104 Router Overview on page 37
Maintaining the MX104 Air Filter on page 74
Rack Requirements for MX104 Routers on page 38
Cabinet Requirements for MX104 Routers on page 39
Clearance Requirements for Airflow and Hardware Maintenance on MX104 Routers
on page 41
MX104 Router Environmental Specifications on page 155
MICs receive incoming packets from the network and transmit outgoing packets to the
network. During this process, each MIC performs framing and high-speed signaling for
its media type. Before transmitting outgoing data packets through the MIC interfaces,
the Packet Forwarding Engine encapsulates the packets received.
The MX104 routers support the following types of MICs:
Front-Pluggable MICs on page 16
Built-in 10-Gigabit Ethernet MIC on page 17
MIC LEDs on page 18
Modular Interface Cards (MICs) install into four slots in the front of the MX104 router and
provide the physical connections to various network media types. MICs are hot-removable
and hot-insertable. The slots are labeled
different media types on the same router as long as the router supports those MICs. For
, , , and . You can install MICs of
0/0 0/1 1/0 1/1
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