Kingtone Repeaters
Kingtone system is designed to solve problems of weak mobile signal, which is much cheaper than adding a new Base Station (BTS). Main operation of RF Repeaters system is to receive low‐power signal from BTS via radio frequency transmission and then transmit the amplified signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and transmitted to the BTS via the opposite direction.

Telephone repeater
This is used to increase the range of telephone signals in a telephone line. They are most frequently used in trunklines that carry long distance calls. In an analog telephone line consisting of a pair of wires, it consists of an amplifier circuit made of transistors which use power from a DC current source to increase the power of the alternating current audio signal on the line. Since the telephone is a duplex (bidirectional) communication system, the wire pair carries two audio signals, one going in each direction. So telephone repeaters have to be bilateral, amplifying the signal in both directions without causing feedback, which complicates their design considerably. Telephone repeaters were the first type of repeater and were some of the first applications of amplification. The development of telephone repeaters between 1900 and 1915 made long distance phone service possible. However most telecommunications cables are now fiber optic cables which use optical repeaters (below).

Cellular repeater
This is a radio repeater for boosting cell phone reception in a limited area. The device functions like a small cellular base station, with a directional antenna to receive the signal from the nearest cell tower, an amplifier, and a local antenna to rebroadcast the signal to nearby cell phones. It is often used in downtown office buildings.                                                                                                                                                                                                                                                    
 

Items		Testing Condition	Specification
			Uplink	Downlink
Working Frequency(MHz)		Nominal Frequency	890 – 915MHz	935 - 960MHz
			1710 – 1785MHz	1805 – 1880MHz
Gain(dB)		Nominal Output Power-5dB	90±3
Output Power (dBm)		GSM modulating signal	33	33
ALC (dBm)		Input Signal add 20dB	△Po≤±1
Noise Figure (dB)		Working in-band（Max. Gain）	≤5
Ripple in-band (dB)		Nominal Output Power -5dB	≤3
Frequency Tolerance (ppm)		Nominal Output Power	≤0.05
Time Delay (us)		Working in-band	≤5
Peak Phase Error(°)		Working in-band	≤20
RMS Phase Error (°)		Working in-band	≤5
Gain Adjustment Step (dB)		Nominal Output Power -5dB	1dB
Gain Adjustment Range(dB)		Nominal Output Power -5dB	≥30
Gain Adjustable Linear(dB)	10dB	Nominal Output Power -5dB	±1.0
	20dB	Nominal Output Power -5dB	±1.0
	30dB	Nominal Output Power -5dB	±1.5
Inter-modulation Attenuation (dBc)		Working in-band	≤-45
Spurious Emission(dBm)	9kHz-1GHz	BW:30KHz	≤-36	≤-36
	1GHz-12.75GHz	BW:30KHz	≤-30	≤-30
VSWR		BS/MS Port	1.5
I/O Port		N-Female
Impedance		50ohm
Operating Temperature		-25°C ~+55°C
Relative Humidity		Max. 95%
MTBF		Min. 100000 hours
Power Supply		DC-48V/AC220V(50Hz)/AC110V(60Hz)( ±15%)
Remote Monitoring Function		Real-time alarm for Door Status, Temperature, Power Supply, VSWR, Output Power
Remote Control Module		RS232 or RJ45 + Wireless Modem + Chargeable Li-ion Battery

1 year warranty for equipment .6month for accessories .