Shenzhen Guanri Netcom Technologies Co., Ltd.
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GSM 900MHz Fiber Optic Repeater

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GSM 900MHz Fiber Optic Repeater
Detailed Description

GSM900MHz Fiber Optic Repeater
signal is relayed via fiber optic cable

The Fiber Optic Repeater (FOR) is designed to solve problems of weak mobile signal in such place: far away from the BTS (Base Transceiver Station) and has fiber optic cable network underground.


The whole FOR system consists of two parts: Donor Unit and Remote Unit. They transparently convey and amplify the wireless signal between the BTS (Base Transceiver Station) and mobiles via fiber optic cables.


The Donor unit captures the BTS signal via a direct coupler closed to the BTS (or via open air RF transmission through the Donor Antenna), then converts it into optic signal and transmits the amplified signal to the Remote Unit via fiber optic cables. The Remote Unit will reconvert the optic signal into RF signal and provide the signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.


As per the method of receiving BTS signal by the Donor Unit, two types of FOR are available:

  • Cable-Access FOR: to receive BTS signal via a direct coupler closed to the BTS (recommended);
  • Wireless-Access FOR: to receive BTS signal via a Donor Antenna (applicable when no fiber optic cable connecting to the BTS); can be sorted into 2 sub-categories: Band-Selective and Channel-Selective.


See the overview of Repeater


Application Diagram of Cable-Access FOR


Application Diagram of Wireless-Access FOR


  • Aluminum-alloy casing has high resistance to dust, water and corroding;
  • Omni-directional coverage antenna can be adopted to expand more coverage;
  • Adopting WDM (Wavelength Division Multiplexing) module to realize long-distance transmission;
  • Stable and improved signal transmission quality;
  • One Donor Unit can support up to 8 Remote Units to maximize utilization of fiber optic cable;
  • RS-232 ports provide links to a notebook for local supervision and to the built-in wireless modem to communicate with the NMS (Network Management System) that can remotely supervise repeater’s working status and download operational parameters to the repeater.



To expand signal coverage or fill signal blind area where signal is weak or unavailable.

  • Outdoor: Airports, tourism regions, golf courses, tunnels, factories, mining districts, villages, highways…
  • Indoor: Hotels, exhibition centers, basements, shopping malls, offices, parking lots, …

The FOR is mainly applicable to such case:

  • Underground fiber optic cable network already exists beneath the area to be covered;
  • There is huge obstructive terrain between the BTS and the area to be covered;
  • The distance between the BTS and the area to be covered is 20 km around.

In comparison with RFR (RF repeater) and FSR (frequency shift repeater), the FOR has the following benefits and disadvantages:

  • No more self-oscillation and easy to choose installation location;
  • For Cable-Access type, pure BTS signal picked up by the Donor Unit will greatly reduce the signal noise;
  • The Remote Unit can be installed out of the BTS coverage;
  • A full 360-degree coverage can be realized;
  • No need to occupy frequency resource as the link frequency.
  • The total cost of equipment is higher;
  • A fiber optical connection between the Donor Unit and Remote Unit is required.


 Donor UnitRemote Unit
Working Frequency (customizable)Uplink890~915MHz
Transmission Distance≤ 20km
Max. Input Level+10dBm--
Output Power (customizable)0 dBm27~43 dBm (0.5~20 W)
Gain≥ 65dB
Gain Adjustment Range1~31dB @ step of 1dB
Voltage Standing Wave Ratio (VSWR)< 1.5
Noise Figure< 5dB (only for uplink)
In-Band Ripple≤ 3dB p-p
Spurious Emission≤ -36dBm
In-Band Intermodulation Attenuation≤ -40dBc/30kHz
System Delay≤ 5.0μSec
I/O Impedance50Ω
Fiber Optic Light SourceLaser unit (wavelength: 1310nm / 1550nm)
Optical Output Power≥0dBm (1310nm) / ≥3dBm (1550nm)
Optical Receiver Sensitivity≤ -25dBm
RF ConnectorN-Type (Female)
Temperature RangeOperation: -25°C ~ +55°C / Storage: -30°C ~ +60°C
Relative Humidity Range≤ 95% (non condensing)
Power Supply (customizable)DC +24V / DC -48V / AC 220V±15%, 50Hz / AC 110V±15%, 50Hz
Backup Power Supply (optional)4 hours
Casing LevelCable-Access: --
Wireless-Access: IP65
Output power @27~30dBm: IP31
Output power @33~43dBm: IP65
DimensionsCable-Access: 418mm X 90mm X 290mm
Wireless-Access: 630mm X 400mm X 230mm
Output power @27~30dBm: 385mm X 300mm X 130mm
Output power @33~37dBm: 570mm X 325mm X 215mm
Output power @37~43dBm: 630mm X 400mm X 230mm
WeightCable-Access: 6kg
Wireless-Access: 35kg
Output power @27~30dBm: 8kg
Output power @33~37dBm: 27kg
Output power @37~43dBm: 35kg
Remote Monitoring/Control via NMSSupported
ALC (Automatic level control)Supported
Fiber Optic Repeater

RPT864 (GSM 900MHz) / RPT884 (GSM 1800MHz) / RPT894 (GSM 1900MHz)
RPT914 (CDMA 450MHz) / RPT934 (CDMA 800MHz) / RPT994 (CDMA 1900MHz)

We have important business in the overseas market due to our high quality and reasonable prices. Also,we can supply Repeater according to customers’ requirements!We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise the high quality but the low price . Welcome to discuss the business.We are sincerely looking for your cooperation.

Company information:
    Our company name is Shenzhen Guanri Netcom Technologies Co., Ltd. Which established in 2007 . We is an exporter of China (Mainland) CCTV System products.    Our products have been sold well in North America South America Eastern Europe Southeast Asia Africa Oceania Mid East Eastern Asia Western Europe! Our company firmly insists on that product quality is the life source of an enterprise.    If we don't have idea of what you're looking for, please call or e-mail with your ideas and we may be able to make you something completely unique!Please vist our website at and use the contact form for a faster response!
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Shenzhen Guanri Netcom Technologies Co., Ltd.
Ms. Chase Wan
3/F, Building R3-B, High-Tech Industrial Park, Nanshan district, Shenzhen 518057 P.R.China

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