Grandstream HT813 Analog Telephone Adapter – 1x FXS + 1x FXO (VoIP & PSTN Gateway)


Bridge the gap between traditional telephony and modern VoIP systems with the Grandstream HT813 Analog Telephone Adapter, a powerful hybrid solution that combines FXS and FXO ports in one compact device.
The HT813 allows you to connect an analog phone while also integrating a PSTN line, making it ideal for businesses transitioning to VoIP without losing access to traditional telephony.
🔹 Key Features
- 1x FXS Port
Connect a traditional analog phone or fax device. - 1x FXO Port (PSTN Line Support)
Connect to a landline for backup or hybrid communication. - VoIP & PSTN Integration
Seamlessly route calls between IP networks and traditional phone lines. - Automatic Failover Support
Switch to PSTN line in case of internet or VoIP failure. - HD Voice Quality
Ensures clear and reliable communication. - Compact & Easy Deployment
Simple setup with minimal space requirements. - Advanced SIP Compatibility
Works with IP PBX systems and VoIP service providers.
🔹 Ideal For
✔ Small Businesses & Offices
✔ Hybrid VoIP + PSTN Environments
✔ Backup Communication Solutions
✔ PBX Integration
✔ Locations with Unstable Internet
🔹 Why Choose HT813?
The HT813 delivers a smart combination of VoIP flexibility and PSTN reliability, ensuring your business stays connected even during network outages — making it a practical and cost-effective communication solution.

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