VoIP Cards (also called telephony cards or PBX cards) are PCI/PCIe hardware cards that connect traditional phone lines (analog, T1/E1/PRI) directly to your Asterisk, FreePBX, or 3CX server. Perfect for building powerful on-premise VoIP systems without expensive gateways.
What Are VoIP Cards and How Do They Work?
VoIP telephony cards convert analog or digital PSTN signals into SIP/VoIP packets right inside your server. This gives you rock-solid call quality, low latency, and full control over your PBX hardware.
Benefits of Using VoIP Telephony Cards
- Direct PSTN connectivity — no extra gateways needed
- Lower cost per channel than external VoIP gateways
- Hardware echo cancellation for crystal-clear calls
- Scalable from 2 to 100+ simultaneous channels
- Full compatibility with Asterisk, FreePBX, Issabel, and more
Types of VoIP Cards We Carry
- Analog Cards (FXO/FXS) – Connect analog phones & PSTN lines
- Digital T1/E1/PRI Cards – High-density digital trunks for larger systems
- Transcoding Cards – Offload codec conversion (G.729, Opus, etc.) from your CPU
- Serial & Specialty Cards – RS232, BRI, and custom telephony interfaces
How to Choose the Right VoIP Card
Consider your server interface (PCI vs PCIe), number of ports/channels needed, echo-cancellation requirements, and compatibility with your PBX software. Not sure which card fits your setup? Our Austin-based VoIP engineers can spec the perfect solution in minutes.
Why Buy VoIP Cards from The Telecom Spot?
✓ Authorized dealer for Digium, Sangoma, Yeastar & top telephony brands
✓ Massive in-stock selection — over 1,000 cards & modules
✓ Same-day shipping from our Texas warehouse on in-stock items
✓ 30-day returns & full manufacturer warranties (including Sangoma lifetime on many cards)
Browse our full inventory of VoIP telephony cards below or contact our team for expert recommendations today.
