Base transceiver station of digital mobile telecommunication system using remote interfacing unit

A base transceiver station of a digital mobile telecommunication system comprising a master base transceiver station device (master BTS device) and a plurality of remote radio frequency units separated from said master BTS device and installed at a remote site therefrom for processing radio frequency signals, wherein said base transceiver station further comprises remote interfacing means installed between said master BTS device and said remote radio frequency units for:

• a) transmitting control commands to said remote radio frequency units in response to control data from said master BTS device to monitor and control the status of said radio frequency units;
• b) supplying and monitoring operating power to said remote radio frequency units;
• and
• c) receiving status values from said remote radio frequency units and interfacing them to said master BTS device;
• said remote interfacing means including:
• a central processing unit;
• a transmission modem for modulating said control data from said master BTS device in a frequency shift keying manner and transmitting the modulated control data to said radio frequency units;
• a frequency divider for dividing the frequency of output data from said transmission modem into different frequencies;
• a plurality of diplexers, each of said diplexers transmitting a corresponding one of output signals from said frequency-divider to one of said radio frequency units associated with a given sector at a transmission frequency and receiving said status value from said corresponding radio frequency unit at a reception frequency;
• a plurality of reception modems for demodulating output data from said diplexers in said frequency shift keying manner, respectively;
• and
• a signaling connection controller for receiving output data from said reception modems and sending the received data to said master BTS device.