Polycom DOC2559A manual Component Description

Models: DOC2559A

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Polycom RMX 4000 Hardware Guide

Table 1-5Polycom RMX 4000 Component Description (Continued)

Component

Description

 

 

AC/DC Power

The AC Power Supply drawers are located below the

Supply Modules

MPM+/MPMx Cards and are connected to the backplane

 

by means of a power connector. Operating at 100-240

 

volts AC 50/60 Hz all power supplies have built-in load

 

sharing capabilities.

 

On systems with DC current, the Power Rail Module

 

(PRM) provides direct current to the rear of the RMX

 

through the backplane.

 

 

Fan Drawer

Eight fans are mounted sideways and stacked in a

 

drawer. The drawer is connected to the Back-plane by a

 

connector.

 

Airflow is from right to left, and out the side of the MCU.

 

Each time a board temperature sensor passes one of its

 

thresholds an event is sent to the ShelfManager,

 

whereupon an threshold alert is posted on the RMX

 

Manager, and increases the fans speed. There are

 

currently 3 sets of thresholds: Normal, Major and Critical.

 

When the temperature reaches a critical threshold (and

 

the fan’s speed increase did not resolve the issue), the

 

controller of the relevant board initiates a shut down.

 

 

Multi Processor

The MPM+ cards, perform the various RTP, audio and

Module+ (MPM+)

video processing functions on the RMX 4000 unit. TI

Card

C6455 processors are at the core of each MPM+ card

 

which are available in the following assemblies:

 

MPM+20 (20 CIF resources)

 

MPM+40 (40 CIF resources)

 

MPM+80 (80 CIF resources)

 

Note: An MPM+ located (on the front panel) must face

 

opposite (same slot level) an RTM LAN card (installed on

 

the rear panel). For more information, see "RTM LAN” on

 

page 1-31.

 

 

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Page 31
Image 31
Polycom DOC2559A manual Component Description