Grandstream HT812 2-Port Analog Telephone Adapter with Gigabit NAT Router

Overview

The Grandstream HT812 is a two-port analog telephone adapter designed to connect traditional phones and fax machines to modern VoIP networks without changing how you use them. It features two FXS ports for your existing handsets and an integrated Gigabit NAT router with dual Ethernet ports, allowing it to serve as a central hub for small networks. This adapter supports secure voice communication with TLS and SRTP encryption and simplifies setup through automated provisioning methods.

Key features

• Two FXS ports enable connection of analog phones or fax machines, preserving your current devices while upgrading to VoIP.
• Built-in Gigabit NAT router with dual Ethernet ports shares high-speed internet with multiple devices, reducing the need for extra networking hardware.
• Secure voice calls with TLS and SRTP encryption protect conversations over public networks.
• Automated provisioning via TR-069 or downloadable XML files streamlines installation and configuration.
• 3-way voice conferencing supports quick team discussions without additional equipment.
• T.38 Fax-over-IP support maintains reliable fax transmission over IP networks.
• Seamless integration with Grandstream UCM IP PBXs creates a unified communication platform for mixed analog and IP environments.
• Remote centralized management through the Grandstream Device Management System (GDMS) allows IT teams to monitor, update, and troubleshoot devices efficiently.

Key specs

• Ports: 2 FXS analog telephone ports
• Ethernet: Dual Gigabit Ethernet ports with NAT router
• Security: TLS and SRTP encryption for voice traffic
• Provisioning: TR-069 and XML file support for automated setup
• Fax support: T.38 Fax-over-IP protocol
• Voice conferencing: 3-way conferencing capability

Connectivity and compatibility

The HT812’s dual Gigabit Ethernet ports allow it to connect directly to your internet modem and local network devices, providing both voice and data connectivity through a single unit. It supports standard SIP protocols, ensuring compatibility with a wide range of VoIP service providers and Grandstream UCM IP PBX systems. This makes it a flexible choice for small offices or home setups that need to integrate analog devices into an IP-based communication environment.

Installation and setup

Setting up the HT812 is straightforward thanks to its support for automated provisioning via TR-069 or XML configuration files. This reduces manual configuration time and helps maintain consistent settings across multiple devices. Its compact design fits easily on a desk or in a communications rack, making it suitable for both home offices and small business environments.

Ideal uses and environments

This adapter is well suited to small businesses and remote workers who want to keep their existing analog phones and fax machines while upgrading to VoIP technology. It works well in home offices, small office networks, and locations that require secure voice communication and reliable fax transmission. The ability to manage devices remotely also makes it a strong choice for IT teams overseeing multiple deployments.