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GSM/3G Repeaters

GSM Repeaters

GSM Amplifier/Repeater SIGNAL GSM-1205
Code: A6785
Price w/o taxPriceDisc.Validity  
506.95 EUR506.95 EUR0 %
GSM Amplifier/Repeater SIGNAL GSM-1205
Top view

GSM Amplifier/Repeater SIGNAL GSM-1205
Rear view

GSM Amplifier/Repeater SIGNAL GSM-1205
Bottom view

GSM Amplifier/Repeater SIGNAL GSM-1205
The included accessories
GSM Amplifier/Repeater SIGNAL GSM-1205
View of the packaging
Signal GSM-1205 A6785 repeater allows to amplify GSM signals inside buildings. The device is ideal for locations where the range of a cellular network allows for use of mobile phones out of buildings, but is insufficient for indoor operation. Such locations include some remote places (long distances to base stations), but more often rooms in old buildings with thick walls or in basements and cellars (e.g. pubs, coffee shops). A strong barrier can also be modern windows with panes covered with metallic layers.
The SIGNAL GSM-1205 repeater is among the first devices that amplify the whole GSM+EGSM frequency range and comply with ETSI 300 609-4 standard that is the basis for CE declaration.
Distinguishing features:
  • Support for GSM networks (GSM+EGSM) - 880-960 MHz;
  • Compliance with ETSI 300 609-4 required for this kind of devices;
  • AGC (ALC) - automatic gain/level control;
  • MGC - manual gain control (attenuator);
  • Gain suitable for the coverage area;
  • Indoor coverage area up to 1200 m2;
  • Easy installation (Plug and Play);
  • The packaging does not contain an outdoor antenna (it should be selected depending on signal level - usually A741030, sometimes A7018 or A7028);
  • 24-month warranty.
Contents of the set:
  • Main unit,
  • Special bracket for mounting the device,
  • User manual (in English),
  • Power supply.
This product can solve the problem of low signal in hotels, boardinghouses, and various buildings, allowing to use cellular phones for calls and Internet access.
Important features:
Extended operating band. The GSM repeater amplifies signals of the "old" GSM band and new EGSM band that has been introduced to increase the number of operators. The total frequency range of the device covers 880-915 MHz and 925-960 MHz bands.
ALC function. Automatic level control automatically adjusts gain of the device within range of 20 dB. It will not allow to overdrive the internal amplifier in the case of input signal fluctuations.
Adjustable input attenuation The built-in attenuator allows to adjust the optimum level of the input signal (attenuation 0-31 dB, step 1 dB).
The National Institute of Telecommunications in Warsaw, Poland, confirmed the compliance of the device with ETSI 300 609-4 standard.

CE Declaration of Conformity for GSM-505 A6785
Additional information on the new repeaters is available here.
Installation of the Signal GSM-1205 A6785 repeater:
  • find a place outside building with a good GSM signal,
  • mount the outdoor antenna (usually A741030) so that it is directed towards GSM base station,
  • choose a location for installing the repeater somewhere inside the building to place the indoor antenna in the central part of the building/hall/room to be covered,
  • check if the distance to the place outside is not longer than 10 m (longer distances are not recommended due to power loss),
  • install the Signal GSM-1205 repeater in the suitable place in the hall/room (away from heaters etc., ensuring natural ventilation),
  • be sure that the antennas are connected to the dedicated, marked sockets,
  • connect the AC power plug to a wall outlet (230 VAC).
Signal GSM-1205 A6785 repeater connects with both antennas via coaxial cables. It usually provides enough flexibility to place the device near an AC power socket.
Below there is an example of using the repeater for better cellular coverage in a home
Typical application

NameRepeater SIGNAL GSM-1205
Operating band [MHz]880-915
Output power [dBm]20
Gain [dB]
Max group delay [ μs]0.5
Input attenuation (adj. manually) [dB]0-31 (step 1)
AGC range [dB]up to 20
Indoor coverage area [m2]up to 1200
Impedance [Ω]50
 100-240 VAC (2 A)
9 VDC (3 A)
(ETSI 300 609 -4), RoHS
Dimensions [mm]218x155x65
Antenna connectors (for outdoor/indoor antenna)N-f/N-f
Repeaters made to order
We also offer selective GSM repeaters for GSM operators.

To evaluate the price of such a repeater, we need the necessary technical specifications:
  • frequency range: 400 MHz to 2700 MHz. A single repeater can amplify multiple channels, also with spacing.
  • gain:10 dB to 85 dB
  • output power: 1...27 dBm
  • connectors: SMA or N
Please send your inquiries to our customer service.
Price w/o taxPriceDisc.Validity  
506.95 EUR506.95 EUR0 %
GSM Amplifier/Repeater SIGNAL GSM-1205
Code: A6785