What is a GSM Gateway?
A GSM Gateway connects VoIP systems to mobile networks.
Make outbound calls to mobile phones using real SIMs — no extra lines needed.
Why Use a GSM Gateway?
Lower Costs. Greater Control. No Dependencies.
Send calls through GSM networks and eliminate reliance on external SIP trunking or VoIP providers. Ideal for call centers, businesses, and remote teams.
A GSM Gateway connects VoIP systems to mobile networks.
Make outbound calls to mobile phones using real SIMs — no extra lines needed.
Insert SIM Cards
Slide in your GSM, 3G, or LTE SIMs
The gateway supports up to 44 SIMs — install as many as your use case needs.
Connect to Your VoIP System
Connect via SIP to your IP PBX or dialer
Works with Asterisk®, FreePBX, 3CX, and most SIP-based systems — zero coding needed.
Start Calling & SMS Blasting
Route outbound calls through mobile networks, or send bulk SMS via API.
Works with Asterisk®, FreePBX, 3CX, and most SIP-based systems — zero coding needed.
Built for Businesses That Rely on Communication
Whether you’re running a call center, managing branches, or sending SMS campaigns — OpenVox's GSM Gateway adapts to your workflow.
Power outbound calls with real SIMs — faster dialing, lower costs.
Manage inbound/outbound calls from stores using local SIMs.
Works with Asterisk®, FreePBX, 3CX, and most SIP-based systems — zero coding needed.
Stay connected even with unstable internet — GSM backup ensures uptime.
We’re here to help you understand the right setup for your business — no hard selling, just real answers from real people.