Juniper J4350, Руководство по началу работы

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Chapter 3
Physical Interface Modules Overview
A Physical Interface Module (PIM) is a network interface card that is installed on a
J-series Services Router, to provide physical connections to a LAN or a WAN. The
PIM receives incoming packets from the network and transmits outgoing packets
to the network. Each PIM is equipped with a dedicated network processor that
forwards incoming data packets to the Routing Engine, and receives outgoing data
packets from the Routing Engine. During this process, the PIM performs framing
and line-speed signaling for its medium type.
WARNING: PIMs are not hot-swappable. You must power off the Services Router
before removing or inserting a PIM.
For a complete list of supported PIMs, see Table 14.
For information about network interfaces, see the interfaces overview and
configuration information in the
J-series Services Router Basic LAN and WAN Access
Configuration Guide .
For a J-series Services Router PIM compatibility matrix and datasheets, go to
http://www.juniper.net/products/jseries/
.
This chapter contains the following topics.
PIM Terms on page 27
Field-Replaceable PIMs on page 29
PIM Terms
To understand the PIMs, become familiar with the terms defined in Table 13.
Table 13: PIM Terms
Term Definition
ADSL 2/2+ Annex A ITU-T Standard G.992.1 that defines how ADSL works over plain old telephone
service (POTS) lines.
PIM Terms
27