G31-3/5/28 EXA


The Cel-Fi GO is an extremely effective repeater designed to improve mobile phone and data coverage. This model has been designed to improve Telstra 3G and 4G services in a matter of minutes.

Setting up the repeater to improve indoor mobile coverage is simple. The unit has an input connection and an output connection which are set up as follows:

  • Input connection: connected to roof mounted antenna by cable
  • Output connection: can either connect directly to an antenna, or can use one or more cables to distribute signal elsewhere.

The Cel-Fi GO works by decoding and amplifying weak signal detected by the roof mounted antenna. This cleaner signal is then rebroadcast at full "five bar" strength by the antenna connected to the output port.

Mobile services can be distributed throughout a large home or building by using a series of antennas, creating localised hotspots of 3G or 4G service. This type of system is known as a Distributed Antenna System (DAS) and needs to be carefully designed to ensure proper functioning.

The Telstra Cel-Fi GO can operate on one frequency band at a time. With Telstra shutting down its 3G network the unit should be set to operate on the 700 MHz 4G network which provides both voice and high speed internet services.

RF Specification

Simultaneous Bands
Supported Technologies
Relay Bandwidth
20 MHz
Supported Bands
Frequency Band Duplex Method MIMO Downlink Output Power Uplink Output Power Max. Channel Width Downlink Start Frequency Downlink Stop Frequency Uplink Start Frequency Uplink Stop Frequency
20 MHz
15 MHz
20 MHz
RF Connections
RF Connector Function Quantity RF Interface Notes
Donor Input
Service Output

Network Interfaces

Wireless Interfaces
Bluetooth Interface
Power Class
Ethernet Interfaces

Physical Specification

Ingress Protection
Screw / Bolt
255 × 87 × 28 mm
Min. Operating Temperature
0 °C
Max. Operating Temperature
65 °C
0.6 kg
Device Power Specifications
Max. Consumption
15 W

Power Interface

Power Connector Nominal Voltage Min. Input Voltage Max. Input Voltage Voltage Type Input Current
DC Coaxial, Type A, Female 5.5 x 2.5 mm
9.6 V
28.8 V
Cel-Fi GO G31 Repeater

Nextivity, Inc. develops and sells in-building cellular coverage technology products and solutions. The Company helps wireless subscribers and increases radio frequency network capacity for mobile network operators. Nextivity operates in the State of California.

Nextivity is best known for its Cel-Fi range of mobile repeater solutions which provide low cost improved in-building coverage solutions.