Grandstream HT813 Analog Telephone Adapter – 1 FXS, 1 FXO, 2 Gigabit NAT Router

Grandstream HT813 Analog Telephone Adapter with Integrated NAT Router

The Grandstream HT813 VoIP gateway is a versatile analog telephone adapter designed to bridge traditional telephony systems with modern IP communications. Featuring 1 FXS port, 1 FXO port, and an integrated dual Gigabit NAT router, this gateway offers a cost-effective solution for businesses transitioning to VoIP.

Ideal for small offices and enterprise environments, the HT813 supports reliable voice communication while preserving investments in existing analog devices and PSTN connectivity.

Key Features

• 1 FXS port for analog telephones or fax machines
• 1 FXO port for PSTN line integration
• Dual Gigabit Ethernet ports with integrated NAT router
• Supports high-quality VoIP communications
• Secure and reliable SIP-based connectivity
• Compact design for easy deployment
• Ideal for hybrid telephony environments

Specifications

• Model: HT813
• Brand: Grandstream
• FXS Ports: 1
• FXO Ports: 1
• Ethernet Ports: 2 × Gigabit
• Router Function: Integrated NAT Router
• Protocol: SIP
• Application: VoIP and PSTN integration
• Condition: New

Ideal Applications

• Small business VoIP deployments
• Connecting analog phones to IP networks
• PSTN failover solutions
• Hybrid telephony environments
• Fax machine integration with VoIP systems

What's Included

• Grandstream HT813 Analog Telephone Adapter
• Power adapter
• Quick installation guide

Frequently Asked Questions

What is the difference between FXS and FXO?

The FXS port connects analog devices such as telephones and fax machines, while the FXO port connects to a traditional PSTN telephone line.

Can the HT813 be used as a router?

Yes. The device includes two Gigabit Ethernet ports and integrated NAT routing capabilities.

Who should use this gateway?

The HT813 is ideal for businesses looking to integrate analog devices into a VoIP environment while maintaining PSTN connectivity.