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Chapter 1

Cisco AS5850 Product Overview

Figure 1-10 GBIC Module

Receiver

Table 1-10 GBIC Types

GBIC

1000BASE-SX

1000BASE-LX/LH

DC-Input Power Entry Module

The Cisco AS5850 is equipped with two power-entry modules (PEMFs), which accept DC-input power

either from your site DC source or from an optional AC-input power shelf, and distribute –48 VDC to

–60 VDC power to the chassis components using the backplane. The PEMFs provide power redundancy

and load-sharing; however, a single PEMF can power a fully configured system. The PEMF also contains

a passive DC power filter, which includes a broadband electromagnetic interference (EMI) filter and

circuitry for monitoring power coming into the chassis.

Note

Whenever possible, you should connect each PEMF to a separate DC power source.

The PEMFs are cooled by system airflow, which flows from the top to the back of the chassis. The front

and sides of the PEMFs are perforated for minimum airflow restriction.

The PEMFs support the following functions:

•

78-10573-06 0A

Transmitter

Product Number

WS-G5484

WS-G5486

Power redundancy and load sharing

The DC-input power supply provides redundant power by design. During normal operation, the two

PEMFs provide system power simultaneously (load share). When you remove one PEMF, the

remaining PEMF immediately ramps up to provide full power and maintain uninterrupted system

power.

System environmental monitoring

A 24-pin connector monitors system environmental status and communicates this status from each

PEMF using the maintenance bus (Mbus).

signals.

Table 1-11

lists connector pins supporting system status

Cisco AS5850 Universal Gateway Hardware Installation Guide

Field-Replaceable Units

1-23