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OpenVox GWM401G VoxStack GSM Gateway Module (4 GSM Channels) *Replacement product of GWM400G*

Tax included
Reference: VS-GWM401G

OpenVox VS-GWM400G GSM Gateway Module.

The replacement for GWM400G is the OpenVox GWM401G GSM Gateway Module for the Voxstack series GW1202 V1, GW1600 V1, GW2120 V1 and SWG-2008, GW1600 V2, GW2120 V2. For the GWM401G and GWM400G, the difference is GWM401G without cluster, other functions both are the same.

Delivery 4 - 5 Work days


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Free delivery for order over € 300


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Payment with VISA, VISA Electron, MasterCard, Maestro


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  • OpenVox will launch a new 4 channels GSM module GWM401G, which can work with GW1202/GW1600/GW2120 and SWG-2008/GW1600 V2/GW2120 V2 VoIP Gateway well. Compare with GWM400G, the difference is GWM401G without cluster.

    OpenVox GWM401G Wireless Gateway Module allows OpenVox wireless VS-GW1202/1600/2120 series gateways to support GSM connection to the VoIP devices, each module offers 4 GSM channels. 

    They can bring you excellent HD voice service with multiple codecs, including G.711U, G.711A, GSM, G.722, G.723, G.726, G.729, and also flexible SMS service with multiple SMS API. The GWM420 Series 

    Wireless Gateway Module will be 100% compatible with Asterisk, 3CX, FreePBX, FreeSWITCH and VOS 
    VoIP operating platform, and help users reduce telecommunications and communication costs. 


    • VoIP Characters 
    • Support SIP/IAX2 Protocol 
    • DTMF Mode: RFC2833/Inband/SIP Info 
    • SIP V2.0 RFC3261 Compliance 
    • Abundant Codecs:G.711A, G.711U, G.729, G.722, G.723, G.726, GSM 
    • Work as both SIP Client and Server mode


    • PPTP VPN 
    •  Ping & Traceroute  
    • Firewall


    • Friendly GUI and easy configuration 
    • WEB/SSH Access and Management 
    • Support configuration files backup and restore 
    • Support  multiple languages 
    • Firmware Update by Web 
    • CDR 
    • Detailed Log 
    • Network and  SIP capture

    System Features

    • SIP/IAX2/Wireless Group Settings 
    • Random call interval 
    • Call Duration Limitation 
    • Open API Protocol (based on Asterisk) 
    • Two-stage dialing  
    • Multiple SMS API 
    • SMS/USSD 
    • PIN Identification 
    • SMS Bulk Transceiver and Auto Resend 
    • SMS to Email 
    • SMS  Forwarding and Quick Reply 
    • SMS Remotely Controlling Gateway 
    • Flexible Call Routings  
    • Schedule Reboot 
    • Support MMP 
    • Support for Custom Scripts, Dialplans 
    • Support OpenVox Cloud Service 
    • CLID Display & Hide (Need operators' support ) 


    • Product Name: GWM401G 
    • Module Type: GSM 
    • Module Number: 4 
    • Channel Number: 4 
    • Band: GSM: 850/900/1800/1900MHz 
    • Power: 28W 
    • Weight (without antenna):  164g 
    • Dimension (without antenna):  124mm*185mm*21mm  
    • SIM Card: Hot-Swap  
    • Operation Temperature: 0°C ~ 40°C 
    • Operation Humidity Range: 10% ~ 90% 
    • Storage Temperature Range: -20°C ~ 70°C 

    Shipping weight:  0,30 Kg
    Product weight:  0,21 Kg

Specific References