• 2.5G GSM Voice, SMS & GPRS BTS + UE + Backhaul replication in Lab
  •  400MHz to 3400MHz Software Configurable Radio Transceiver for
    Quad band GSM operation
  • Low power for FCC compliant license free safe operation
  • No recurring cost of software or licenses
  • ASIC Architecture: combines LNA, PA driver, RX/TX Mixers, RX/TX Filters, Synthesizers, RX Gain control, TX power control
  • +5dBm Transmit power & -120dBm Sensitivity Receiver
  • FPGA programmable transmission and reception for low latency
  • Supports both TDD & FDD Full Duplex as per 3GPP standards
  • Calibrated +0.1ppm TCXO frequency reference


This is  ideal for lab use and ideal for engineering colleges, universities,testing labs and training centers. It allows to replicate small 2.5G GSM (Voice + GPRS)cellular network and start making calls in less than an hour. It allows youto connect a standard GSM mobile phone directly with VOIP networks as SIP endpoint to call PSTN landline or mobile phone on other networks in other locations using a software based GSM BTS . The lab is complete with base transceiver station, multiband cellular phones, backhaul radio.Base station controller (BSC) functions and operations/maintenance(O&M) and network management system (NMS) functions for controlling the base stations with software provided for exceptional value &performance.A multiband software configurable radio performs the function of BTS which facilitates wireless communication between User Equipment UE or GSM cellular phones in this case. Users can bring their own devices or the android phones provided with special apps that allow calculation of ARFCN, measurement of RF signal level of BTS for call handover handoff study and various other experiments. Users can roam about in lab environment while connected on a voice call inside and outside the cell radius of BTS.The system is based on a reconfigurable RF/FPGA/ARM hardware platform as Um air interface and a BTS software which implements the lower three layers of GSM protocol stack.

The system replaces the conventional GSM operator core infrastructure with inbuilt BSC and radio resource management function. Multiple
systems can share a common VOIP soft switch or PBX to form larger networks.ASIC houses complete RF and DAQ subsystems on a single board. It hosts onboard RF Transceiver subsystems capable of tuning frequencies from 400MHz to 3.4GHz.

Area & scope of Experiments:

  1. Introduction of mobile communication equipment BTS, BSC & UE.
  2. To measure the spectral distribution of GSM frequencies at given location and find a free channel.
  3. To configure the BTS software to set Mobile country code, Network operator code, GSM band and ARFCN channel.
  4. To configure the BTS Software to enable open/limited registration.
  5. To assign a phone number to each registered phone.
  6. To enable call logging of subscribers on BTS.
  7. To get and set your IMSI.
  8. To configure the asterisk communication server for IP PBX and VOIP gateway.
  9. To register phone to the BTS network.
  10. To transmit and receive an SMS using BTS.
  11. To list the TMSI of the phones registered on network.
  12. To establish a voice phone call as echo on mobile phone using BTS.
  13. To establish a voice phone call to another cellular phone using BTS.
  14. To establish a voice phone call to another cellular phone using
  15. To establish a voice phone call to another cellular phone on different network/country using BTS and VOIP gateway
  16. To establish roaming between BTS and UE.
  17. To capture GSM packets using Wire shark.
  18. To establish a data communication link using GPRS.
  19. To study hard & soft call handoff.
    And many more.

What you get:

  • 2.5G Network in a Box
  • Power adapter
  • Antenna for 850/900/1800/1900 MHz operation
  • Filters: one for use in the Americas (ITU Region 2) in red, and one for use in the rest of the world (ITU Regions 1 and 3) in black
  • Two smartphones and chargers
  • 2 SIMs configured
  • USB WiFi Adapter
  • Manuals
  • Experiments Procedure.

This is a new breed of network equipment. It is meeting the demand for low cost, easy to install GSM cellular networks for remote rural
service, rapid deployment and private industrial networks on ships, oil rigs or in mines.The main feature of this systems is the replacement the conventional 2G/3G network’s SS7-MAP structure (Signaling System #7 is a protocol that has dominated telephone system core networks since the 1980’s. It is the basis for ISDN and Intelligent Network technologies. The Mobile Application Part (MAP) is an extension added to SS7 in the 1990’s to support functions required by cellular networks.) and all of its various components (MSCs, BSCs, TRAUs, SGSNs, etc.) with a more modern SIP network, but without any changes to the handsets.

This approach offers the following advantages:

  • much lower deployment costs (CAPEX), especially for small operators
  • much lower operating costs (OPEX), for carriers of all sizes
  • plug-in compatibility with existing SIP-based core networks
  • plug-in compatibility with future IMS core networks

The key ingredient that makes this change possible is a software defined radio SDR implementation of the GSM radio access network that presents normal GSM handsets as virtual SIP endpoints. In other words, through SDR BTS, any GSM handset appears as a SIP device, without the need for any special software on the phone.

Significant cost savings from this approach are due to several factors:

  • For small networks, the core network hardware can be reduced to a single commodity server, or core network applications can even be run on excess resources in the base stations themselves.
    • For larger networks, the core network hardware is based on commodity servers and IP routing equipment, making it possible for the provided to have one shared IP network for both data and voice.
    • Because all of the cellular network software runs on Linux and connects with commonly used TCP/IP and UDP/IP protocols, the core network can even be virtualized and run in a “cloud” service, like Amazon’s Ec2.
    • All of the proprietary software found in a conventional GSM network can replaced with open-source applications like open-source applications like SIP Express Router (SER), Yate, Apache web server and MySQL database server, eliminating recurring licensing fees.
    • Because the new core network is based on IETF internet-age protocols, newly graduated engineers and software developers do not require additional training to deal with archaic SS7 technologies.
    Beyond cost savings, the conversion of the network from legacy telco protocols to internet protocols gives the operator new opportunities to implement custom speech, text and USSD applications, using web service technologies like Apache and Ruby, or through cloud-based application platforms like Tropo or Twillio. These applications can even be installed in individual cell sites to provide locally-tailored service.

The components of the network are RAN Nodes, Subscriber Registry SR, PSTN Gateway, Messaging Server MS, Internet Gateway implemented in this system.
The system allows network to be integrated to PSTN, Legacy PLMN for SMS and Roaming support, 4G IMS Networks, Small Network for rapid deployment, Satellite backed small sites and Mixed 2G/3G/4G networks.

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