OpenVox VS-GW2120-24G

OpenVox VS-GW2120-24G

24 GSM Channels, SIP, Quad-Band GSM/GPRS 850/ 900/1800/1900 MHz, G.711A, G.711U, G.729, G.722, G.726, iLBC, GSM, WEB, IMEI

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$3,051.62 tax incl.
$2,522.00 tax excl.


OpenVox VoxStack Series GSM Gateway is an industry 1st open source asterisk-based GSM VoIP Gateway solution for SMBs and SOHOs. With friendly GUI and unique modular design, users may easily setup their customized Gateway. Also secondary development can be completed through AMI (Asterisk Management Interface).

There are three GSM Gateway models with VoxStack series GSM Gateway, the VS-GW1202 series, VS-GW1600 GSM series and VS-GW2120 series. The new GSM Gateway VS-GW2120 Series with the Modular Design can provides up to 11 plug-in GSM gateway modules which could support from 4 to 44 GSM channels and 3 Ethernet ports, developed for interconnecting a wide selection of codecs, including G.711A, G.711U, G.729, G.722, G.723, G.726 & GSM, to the GSM cellular networks to quickly reduce telecommunication expenses and maximize cost-savings. With the unique design of the VoxStack Gateway, it can support hot-swap for both SIM cards and GSM gateway modules. Users can simply add or remove the modules for hardware expansion or exchange. Each GSM gateway module runs an independent asterisk system inside.

The VoxStack gateway designs with a Lan Switch board that provides stackability on the hardware upgrade. It supports SMS messages sending and receiving and group sending and SMS to email. The GSM Gateways are 100% compatible with asterisk, Elastix, trixbox, 3CX FreeSWITCH sip server and VOS VoIP operating platform.

Technical Specifications:

  • Up to 44 GSM Channels
  • 1 SIM card per GSM channel
  • 3 10/100M LAN interfaces
  • Up to 44Standard SMA-K interfaces
  • Storage temperature range: -20~70℃
  • Operation temperature range: 0~40℃
  • Operation humidity range: 10%~90% non-condensing
  • Power source: 100-240V/2-3A
  • Power: 88W
  • Dimension: 48.3cm*33.1cm*8.8cm
  • Weight:
    VS-GW2120 Series: 8624g
    VS-GWM400G: 214g

The VS-GW2120 GSM series includes the following models:

Product  Model



4 GSM Channels VoIP Gateway


8 GSM Channels VoIP Gateway


12 GSM Channels VoIP Gateway


16 GSM Channels VoIP Gateway


20 GSM Channels VoIP Gateway


24 GSM Channels VoIP Gateway


28 GSM Channels VoIP Gateway


32 GSM Channels VoIP Gateway


36 GSM Channels VoIP Gateway


40 GSM Channels VoIP Gateway


44 GSM Channels VoIP Gateway

Software & Platform:

  • Linux


  • Certificates:CE




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