Juniper Networks M10i Benutzerhandbuch

Table 6: Chassis Physical Specifications

Value

Description

8.7 in. (22.1 cm)

Chassis height

■

17.5 in. (44.5 cm) for sides of chassis

■

19 in. (48.3 cm) with mounting brackets

Chassis width

18 in. (45.7 cm)

Chassis depth

79 lb (35.8 kg)

Weight, maximum configuration

57 lb (25.9 kg)

Weight, minimum configuration

■

AC: 3276 BTU/hour (960 W)

■

DC: 1965 BTU/hour (576 W)

Thermal output

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 

). 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

Chapter 2: Hardware Component Overview