Figure 3-4 Board Configuration Of The Bbu3900; Figure 3-5 Position Of The Cable Trough - Huawei 3900 Series Solution Manual

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3 Hardware Description

Figure 3-4 Board configuration of the BBU3900

Configuration Principles of the RF Modules

Configuration principles of the RF modules are as follows:

Cabling Principles

The routing principles for the RF jumpers are as follows:

3-10

If the total number of RF modules is not more than six, configure all the RF modules in

one cabinet. If the total number of RF modules is more than six and WRFUs are required,

configure all the WRFUs in the extension cabinet and the DRFUs in the main cabinet. Note

that the BBU is configured in the main cabinet rather than the extension cabinet.

In each cabinet, the DRFUs and WRFUs are alternately installed. For example, if three

DRFUs and three WRFUs need to be installed in a cabinet, the DRFUs are installed in slots

0, 2, and 4 and the WRFUs are installed in slots 1, 3, and 5. If only three RF modules

working in the same standard are configured in the extension cabinet, they should be

configured in slots 0, 2, and 4 respectively.

The RF jumpers are routed inside the cable trough.

cable trough.

NOTE

The power cables and signal cables are routed outside the cable trough.

In a single cabinet or two cabinets installed side by side, the RF jumpers are routed inside

the cable troughs to the top of the cabinet by default before they are led out of the cabinet

from two sides.

Huawei Proprietary and Confidential

3900 Series Base Station GU Co-Cabinet

Figure 3-5

shows the position of the

Issue 04 (2009-07-30)

Solution Guide

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