Cisco 6200 User Manual

Page 4

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Hardware Description

78-5296-02

10/02/98

Cisco 6200 User Guide

1-4

Figure 1-2

Cisco 6200 Chassis, Rear View

Primary (A) and Secondary (B) H-Buses

The backplane’s primary and secondary H-buses (horizontal buses) link the MPC, NTC, and SLCs.
In this release, the primary bus carries all traffic. The buses operate at 160 Mbps total throughput.

Each H-bus has two parts:

A downstream component broadcasts all cells received from the NTC interface to each SLC.
(Logic on the SLC filters and directs cells destined for each port.)

An upstream component provides a contention mechanism for cells received from subscriber
ports to be funneled into the upstream NTC path.

Ethernet Management Bus

A 10Base2-type Ethernet bus in the backplane carries internal management traffic between the cards.

12686

Auxiliary port

connector

Alarm relay
connector

Dangler cables
for subscriber
traffic

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