Juniper Internet Router M160, Hardware Manual

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Hardware Component Overview
For further safety information, see “Safety and Regulatory Compliance Information”
on page 221.
Table 5 summarizes physical specifications for the router chassis.
Table 5: Chassis Physical Specifications
Description Value
Chassis height
35 in. (89 cm)
Chassis width 17.5 in. (44.5 cm) for sides of chassis
19 in. (48.3 cm) with front support posts and center-mounting brackets
Chassis depth
29 in. (73.6 cm)
Weight,
maximum
configuration 370.5 lb (168 kg)
Weight,
minimum
configuration 190 lb (86 kg)
Thermal output 9400 BTU/hour
Packet Forwarding Engine
The Packet Forwarding Engine is a multicomponent system that uses
application-specific integrated circuits (ASICs) to perform Layer 2 and Layer 3
packet switching, route lookups, and packet forwarding. The ASICs include the
Distributed Buffer Manager ASIC, Internet Processor II ASIC, I/O Manager ASIC,
Packet Director ASIC, and media-specific controller ASICs.
The Packet Forwarding Engine has the following components:
Midplane—Physically separates front and rear cavities inside the chassis,
distributes power from the power supplies, and transfers packets and signals
between router components, which plug into it.
Physical Interface Card (PIC)—Physically connects the router to network media
such as OC-12/STM-4, OC-48/STM-16, Ethernet, and channelized interfaces.
PICs are housed in Flexible PIC Concentrators (FPCs). (Quad-wide PICs, such
as the OC-192/STM-64 SONET/SDH PIC, are exceptions. Such PICs occupy
Packet Forwarding Engine
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