External Interfaces; Indices; Bcpm; Overview - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
IV. Clock module
It provides working clock for the local board.
V. Power supply module
The power supply module converts +24V input power into +3.3V for various modules of
local board.

2.3.3 External Interfaces

E1/T1 interface
Interface with BSC. BTS can be connected to the transmission system to connect to the
BSC.
Backplane bus interface
Interface with the other boards in the baseband part.
Emergency serial port
Emergency serial port is an RS-232 serial port, works as a slave node and is used for
communication with BCKM when other part of the board is faulty.
Power supply interface
Led out from the power connector on the backplane, the interface is connected with
+24V power, +24V power ground and PGND.

2.3.4 Indices

Power voltage: +24V.
Power consumption <15W.
Dimensions: 460mm%233.35mm (Length%Width).

2.4 BCPM

2.4.1 Overview

The BCPM is logically located between the BRDM and the BCIM. The BCPM is the
traffic processing board of the system. In full configuration, six BCPMs are needed.
Data from various forward and reverse channels are processed by this board.
The BCPM also processes digital signals, including encoding/decoding baseband
signals and one-time modulation and demodulation of baseband signals. In addition, it
processes high layer control signals. The main functions are as follows:
In forward direction, after ATM cell data from the network side are processed by
the high performance processor, BCPM performs functions such as encoding
Chapter 2 Baseband Subsystem
2-7
System Principle