1 Year



Welcome to the DIY age with this 100% open source 4 port GSM Gateway ready to use in any application.

Using our Sparky single board computer as the base board, we designed this GSM Gateway with the smallest and most scalable AirPrime™ GSM module from SIERRA Wireless™, leader in GSM technology.

GSM projects are now at your fingertips! And yes, these quad GSM units can be connected thanks to our GIGA Ethernet Hub to reach the desired number of GSM modules, 4/8/12.


This 4 Port GSM Gateway is standalone and fan-less, easy to install and has a sturdy construction. This 4 module GSM gateway will bridge IP calls to GSM and vice versa. Use the web interface for easy and quick configuration.

It is a new type of VoIP gateway that allows call terminations from a VoIP network to a GSM network and vice versa. Call connections between IP networks and GSM networks are now bridged seamlessly to extend the voice communication coverage significantly. As the traditional PSTN lines are starting to disappear in developed countries and are not going to be built extensively in under-developed countries, GSM phones are getting more and more popular all over the world with lower service charges. The emergence of Allo bridges the gap between traditional telephone networks and VoIP networks. As a result, local and worldwide voice communications are more convenient, available at a lower cost, and has broader coverage.


  • 4 ports for communication over a SIP-to-cellular connection
  • SMS Sending and Receiving Support USSD service
  • Send Bulk SMS
  • SMS to E-mail
  • Email to SMS
  • SIM Balance Alarm
  • Caller ID Black List
  • Call Duration Limitation for particular SIM
  • Call Back
  • Call Forwarding (unconditional, no reply, busy, not reachable)
  • Open API interface (AMI)
  • Gateway control via SMS.(Reboot, Reload, Fetching IP)
  • Recharge of SIM balance via GUI
  • Flexible call routing
  • Configuration and management using a Web browser
  • Multiple colors available for Acrylic Case
  • Includes 5V PSU and a 16GB eMMC Module
Technical Specifications

CPU ARM Cortex A9 Quad Core Processor at 1.1GHz
Interfaces 1 x Ethernet 10/100 Mbits,2xUSB 2.0,1xHDMI port
1 x USB 3.0
Memory 16 Gigabyte Module
Display Resolution 1080p @ 60fps
Telecom Connector 50 Pin Telecom Connector
Operating Temperature 0 to 70°C
Power +5V-3A 2.5mm DC Jack
GSM modules 4 port
Quad-Band GSM 850/900/1800/1900 MHz
Antenna 4 x External Antenna
Echo Cancellation Built-in GSM Module



  • SIP (RFC3261) compliance
  • NAT support
  • Voice codecs: G722, G.711 A/U law


  • One 10/100 Mbps Ethernet interfaces
  • Protocols: DHCP, TCP/UDP, Telnet, HTTP, TFTP
Sparky SBC
Sparky SBC

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