$3,000.00 - $4,000.00
Min. Order : 1 Piece

OpenVox 44 Ports Quad Bank 2U Rack GSM Gateway VS-GW2120-44G

Get Latest Price
Trade Assurance
Built-in order protection service in alibaba.com
Product quality
On-time shipment
More on shipping and other trade services.

Quick Details

Port: Shanghai,China
Payment Terms: L/C,D/A,D/P,T/T,Western Union,MoneyGram,Different payment terms according to countries
Supply Ability: 1000 Piece/Pieces per Week
Up to 44 GSM Channels: 3 10/100M LAN interfaces/1 SIM card per GSM channel
Place of Origin: China
VS-GW2120-36G VS-GW2120-40G: VS-GW2120-36G VS-GW2120-40G 36 /40 GSM Channels VoIP Gateway
VS-GW2120-28G VS-GW2120-32G: VS-GW2120-28G VS-GW2120-32G 28 /32 GSM Channels VoIP Gateway
VS-GW2120-4G: VS-GW2120-4G 4 GSM Channels VoIP Gateway
Model Number: VS-GW2120-44G
Brand Name: OpenVox
Type: VoIP Gateway
VS-GW2120-12G/VS-GW2120-16G: VS-GW2120-12G/VS-GW2120-16G 12 GSM /16 GSM Channels VoIP Gateway
VS-GWM400G: VS-GWM400G Frequency range: GSM 850/900/1800/1900MHz 4 GSM Port Module
VS-GW2120-8G: VS-GW2120-8G 8 GSM Channels VoIP Gateway
Model: OpenVox VS-GW2120 GSM
VS-GW2120-20G VS-GW2120-24G: VS-GW2120-20G VS-GW2120-24G 20 /24 GSM Channels VoIP Gateway
VS-GW2120-44G: VS-GW2120-44G 44 GSM Channels VoIP Gateway
Packaging Detail: Standard packing, New In Sealed Box.We also pack with wrapping film before shipping.
Shanghai Harmuber Technology Development Co., Ltd.
Gold Supplier
Trading Company
Response Time
On-time delivery rate
US$ 10,000+
Visit Store

VS-GW2120 GSM Series

Product Description


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 use standard SIP protocol and compatible with Leading IMS/NGN platform, IPPBX and SIP servers, support most of the VoIP operating platforms such as Asterisk, Elastix, 3CX, FreeSWITCH ,Broadsoft etc.



  • Simple and convenient configuration via Web GUI
  • Support http / https / SSH
  • Basic security strategy(white/black list, security rules)
  • Optional GSM Voice Codec
  • Codecs support: G.711A, G.711U, G.729, G.723.1, G.722, G.726, GSM
  • Quad-Band GSM 850/900/1800/1900 MHz & Band binding
  • SIP(RFC3261) compliance
  • Support diverse SIP, IAX2 protocols 
  • Multipe SIP/IAX2 Registratio models: None,server, client
  • DTMF Signaling support: RFC2833, Inband, SIPINFO
  • Real Open API Protocol(based on Asterisk)
  • Support static IP and DHCP
  • Call Duration Limit
  • CLIR(Call Line Identification Restriction)
  • Call Waiting
  • Call Forwarding (unconditional, no reply, busy, not reachable)
  • SMS bulk transceiver, SMS automatically resend, Sent to Email
  • Support HTTP SMS interface
  • SMS Forwarding
  • USSD transceiver
  • SMS remotely controlling gateway
  • IMEI number automatically modify
  • PIN identification
  • Mobile number portability (MNP)
  • Flexible routing settings & unlimited routing rules
  • Support DISA
  • Extensible Automatic Callback and Speed Dial
  • Customizable IVR
  • CDR(More than 200,000 Lines CDRs Storage Locally)
  • Support configuration files backup and upload
  • Support for custom scripts, dialplans
  • Least Cost Routing(LCR),according to Time, Port, Calling Number
  • Independent System for Each Module
  • Affordable Price with Superior Performance
  • Hot-swap Design for both Sim cards and Modules
  • Compatible with sip server, such as: Asterisk, Elastix, 3CX, FreeSWITCH, etc
  • Available for OEM
  • 3-Month "No Questions Asked" Return Policy
  • One Year Warranty


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
Product Picture



VS-GW1202 GSM Series.jpg


VS-GW1600 GSM Series.jpg








More Information

Business Partner_.jpg




Contact us

Please feel free to contact us if you have any questions.