Polycom DOC2559A manual AC Power Entry Module PEM, DC Power Rail Module, Component Slot Allocation

Chapter 1- Hardware Description

AC Power Entry Module (PEM)

An AC PEM includes a power inlet, EMI filter and backplane connectors. Power input to the system is fed via a PEM (Power Entry Module) through backplane into the power supply. Each AC power module has its own dedicated power cable. The ON/OFF switch on the rear of the RMX activates any power module installed on the RMX. An AC system has three AC PEMs, one for each power module. On failure, both AC power supplies and PEMs are hot swappable.

DC Power Rail Module

A DC power rail module includes a power inlet, circuit breaker, EMI filter and backplane connectors. Power input to the system is fed via a power rail through backplane into the power supply. Each DC power rail has its own dedicated power cable. The circuit switch on the rear of the RMX activates independently any power rail installed on the RMX. An DC system has two DC rails, one for each power rail. On failure, a DC power rail is field replaceable and the RMX must be switched OFF from the two circuit switches and the mains.

Component Slot Allocation

On the RMX™ 4000, components have been assigned dedicated slots as

defined in Table 1-7. Slot numbers are located on both the front and rear of the RMX™ 4000.

Table 1-7RMX™ 4000 Slot Numbering

Slot ID/No.	Card/Component	Requirement
1-4	MPM+/MPMx	Mandatory: At least 1 MPM+/MPMxcard
	Cards	is required. Each media card also
		requires either an RTM ISDN or an RTM
		LAN card.
5	Fabric Switch	Mandatory
	Module (FSM
	4000)
6	CPU 2	Not Available (NA)

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