Juniper Networks M10i manual Midplane, Chassis Physical Specifications

Chapter 2: Hardware Component Overview

For further safety information, see “Safety and Regulatory Compliance

Information” on page 135.

Table 6 on page 9 summarizes physical specifications for the router chassis.

Table 6: Chassis Physical Specifications

Description	Value
Chassis height	8.7 in. (22.1 cm)
Chassis width	■ 17.5 in. (44.5 cm) for sides of chassis
	■ 19 in. (48.3 cm) with mounting brackets
Chassis depth	18 in. (45.7 cm)
Weight, maximum configuration	79 lb (35.8 kg)
Weight, minimum configuration	57 lb (25.9 kg)
Thermal output	■ AC: 3276 BTU/hour (960 W)
	■ DC: 1965 BTU/hour (576 W)

Midplane

The midplane is a panel located in the center of the chassis, running from side to side and forming the rear of the PIC card cage (see Figure 3). All router components plug directly into the midplane. The midplane contains an EEPROM that stores the serial number and revision level of the midplane.

The midplane performs the following functions:

■Transfer of packets—After being processed by a PIC, an incoming data packet crosses the midplane to the CFEB. The CFEB performs switching and forwarding functions and transfers outgoing packets back across the midplane to the PICs for transmission to the network.

■Power distribution—The midplane distributes power to all router components from the power supplies attached to it. It also provides hot-plug protection for the PIC and HCM slots.

■Signal connectivity—The midplane transports the signals exchanged by system components for monitoring and control purposes.

Midplane ■ 9