1-8 CHAPTER 1: INTRODUCTION
PacketChannel Backplane Description
An ATM Backbone SwitchModule installed in the CoreBuilder 5000 hub
connects to the CoreBuilder5000 PacketChannel backplane. There are
two kinds of PacketChannel backplanes:
■Standard PacketChannel — Supports packet-switching. When you
display hub information, the hub type is listed wit h the suffix -xP
(x may be A or B) to identify this bac kplane, and the backplane type
is listed as PacketChannel.
■PacketChannel plus ATM Cell-Switching (SwitchChannel) —
Supports both packet-switching and ATM cell-switc hing. When you
display hub information, the hub type is listed wit h the suffix -xC
(x may be A or B) to identify this bac kplane, and the backplane type
is listed as SwitchChannel.
Both the PacketChannel backplane and the packet-switching part of
the SwitchChannel backplane:
■Support LAN-switching technology.
■Switch 3.4 million packets per second.
■Provide a 2 Gigabit-per-second bus.
■Are designed as a passive bus that contains no active c omponents
that can break down.
■Occupy the third (upper) backplane slot of th e CoreBuilder500 0
hub.
Slot Restrictions Per
Backplane
Some slot restrictions apply if the hub uses the SwitchChan nel
backplane or if the hub contains no back plane in the third backplane
slot. Refer to Table 1-2 for information about ATM Backbone
SwitchModule installation restric tions and operation .
Tabl e 1- 2 SwitchModule Installation Per Backplane
CoreBuilder
5000 Hub
Backplane Hub Type*SwitchModule Installation and Operation
17-Slot PacketChannel
(Part Number30-0433)
3C96017C-AP
3C96017C-BP
3C96017CH-AP
Install ATM Backbone SwitchModule in any slot in
the hub.
SwitchChannel
(Part Number30-0430)
3C96017C-AC
3C96017C-BC
3C96017CH-AC
Install ATM Backbone SwitchModule in slots 1
through 8 or 13through 17.