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User Manual
Airbridge cBTS3612 CDMA Base Station
2.5.5 BTS Direct Current Switchbox (BDCS)
BDCS is used to distribute power to the system. After t he +27V power is outputted
from the power subrack, it is connected to the distribution copper bar in the
switchbox via the bus bar installed on the back pole. The power is distributed by the
copper bar and connected to terminals. with the power is finally supplyed to the
power consumption units from these terminals. There are also lightning protection
alarm indicators and -48V power status indicators on the switchbox.
There is one set of +27 power sockets on the panel of the DC switchbox, used to
supply power for RF module in maintenance or voltage measurement.
2.6 Environment Monitoring
BTS equipment rooms are usually unattended and widely distributed. In comparison
with switch equipment rooms, BTS equipment rooms have fewer and simpler
facilities, and the system operates in a harsher environment. To ensure the normal
operation of BTS, intensive environment monitoring system is provided to handle
any accidents.
The environment monitoring system of the BTS consists of the environment
monitoring devices and BCKM. The environment monitoring devices collect
environment information and report the information to OMC.
The environment monitoring devices consist of environment alarm collection box
and the sensors.
The environment alarm collection box collects external environment parameter
through the sensors. The parameters are processed in the box. If alarm condition is
met, an alarm will be sent to BCKM as a switch value, via the alarm transmission
signal line, asynchronous serial port and optical fiber. BCKM collects the alarm
signals, makes corresponding processing and reports them to OMC.
The alarm box in the system can in real time monitor the temperature, humidity,
smoke and illegal entry in the environment. It can also automatically detect the
environment conditions based on the specified value, automatically give alarm and
drive related protection apparatus such as fire extinguisher, humidifier, dehumidifier
and burglar proof device. The alarm box can also receive instruction from the control
center to modify parameters and activate protection apparatus.
The alarm box features:
Real-time indication of temperature and humidity.
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Time indication.
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Fire, smoke, humiture, water and three types of burglar alarms.
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Providing panel control key pad.
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System Description
2 Hardware Architecture
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