5.4 IMB03
The Indoor Mini Box (IMB03) is an indoor subrack with a small capacity. It houses a built-in
BBU, AC/DC power equipment, DCDU, or other power equipment.
Exterior
Figure 5-3 shows an IMB03.
Figure 5-3 IMB03
(1) Front cover plate of the IMB03
(2) Protection cover
(3) Warning label to avoid treading (4) Slots of internal modules in the IMB03
Functions
The IMB03 performs the following functions:
l Provides a 3 U space for a distributed base station.
l Supports 220 V single-phase AC input and 110 V dual-live-wire AC input.
l Supports power input of -48 V DC.
l Supports various installation modes, including the wall-mounting mode, rack-mounting
mode, and combined-with-IFS06 mode.
l Provides a well-developed function of heat dissipation and facilitates cabling of internal
modules.
Structure
There are two types of IMB03, that is, the DC IMB03 and AC IMB03.
A DC IMB03 houses the BBU and DCDU-03B, as shown in Figure 5-4.
5 Auxiliary Devices of the BBU3900
BBU3900
Hardware Description
5-6 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 11 (2010-11-10)
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