M7I Midplane Description; Figure 3: Midplane; M7I Hardware Components - Juniper M7I Hardware Manual

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M7i Midplane Description

Copyright © 2010, Juniper Networks, Inc.
around your bare wrist. Failure to use an ESD strap could result in damage
to the router.
The router must be connected to earth ground during normal operation.
For further safety information, see "General Safety Guidelines for M Series,
MX Series, and T Series Routers" on page 125 and "General Safety Warnings
for M Series, MX Series, and T Series Routers" on page 126.
For chassis serial number information , see "Displaying M7i Router Components and Serial
Numbers" on page 187.
M7i Router Physical Specifications on page 159
Overview of M7i Router Installation on page 39
M7i Router Description on page 3
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 on page 7). 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—An incoming data packet crosses the midplane to a CFEB or
CFEB-E. The CFEB or CFEB-E performs switching and forwarding functions and transfers
outgoing packets back across the midplane to the FIC or PICs for transmission to the
network.
Power distribution—The midplane distributes power to all router components from
the power supplies attached to it.
Signal connectivity—The midplane transports the signals exchanged by system
components for monitoring and control purposes.

Figure 3: Midplane

For midplane serial number information, see "Displaying M7i Router Components and
Serial Numbers" on page 187.
Chapter 2: M7i Hardware Components
7