Juniper Networks M160 Packet Forwarding Engine, Chassis Physical Specifications Description Value

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,	370.5 lb (168 kg)
maximum
configuration
Weight,	190 lb (86 kg)
minimum
configuration
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 11