Grandstream HT813 an analog telephone adapter that features 1 analog telephone FXS port and 1 PSTN line FXO port.

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.