Grandstream HT812 — Connect Analog Phones to Your VoIP Network

Save on the Grandstream HT812 2-Port Analog Telephone Adapter with Reef Telecom's industry-leading 10-year warranty. This advanced ATA with integrated Gigabit NAT router lets you seamlessly bridge your existing analog phones, fax machines, and PBX systems to a modern SIP-based VoIP network — ideal for small offices, home offices, and service provider deployments.

Key Specifications

• 2 FXS ports supporting 2 independent SIP profiles
• Dual Gigabit Ethernet ports (10/100/1000 Mbps WAN and LAN)
• Built-in Gigabit NAT router with routing speeds up to 100 Mbps
• TLS and SRTP encryption with unique security certificate per unit
• 3-way voice conferencing per port
• T.38 Fax-over-IP support
• Voice codecs: G.711, G.722, G.726, G.729A/B, iLBC, Opus
• Automated provisioning via TR-069, XML config files, and GDMS cloud management
• Wide range of caller ID formats supported
• Compatible with Grandstream UCM series IP PBXs for Zero Configuration setup

Why Buy from Reef Telecom?

• 10-Year Warranty — The longest in the industry, giving you total peace of mind
• Free Shipping on orders over $300
• Fast fulfillment with FedEx Priority and First Overnight options
• Trusted B2B telecom equipment supplier

Ideal Use Cases

The Grandstream HT812 is perfect for businesses transitioning from legacy analog phone systems to VoIP, home office setups requiring reliable SIP connectivity, and service providers deploying managed voice solutions at scale. Pair it with any SIP-compatible IP PBX or hosted VoIP service for a cost-effective unified communications solution.

Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.