Grandstream HT812 V2 2-port ATA with Gigabit NAT Router
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The Grandstream HT812 V2 is a powerful 2-port analog telephone adapter (ATA) that seamlessly bridges traditional analog phones and fax machines with modern VoIP networks. Equipped with gigabit Ethernet ports and advanced NAT router functionality, this versatile device is ideal for small businesses and home offices looking to modernize their telephony infrastructure without sacrificing existing analog equipment.
Key Features and Benefits
- Dual FXS Ports: Connect up to 2 analog telephones or fax machines to your VoIP network
- Gigabit Network Performance: 2x 10/100/1000Mbps RJ45 ports ensure fast, reliable network connectivity
- Integrated NAT Router: Built-in routing capabilities simplify network configuration and deployment
- Advanced Voice Codecs: Supports G.711, G.722, G.729A/B, Opus, and more for superior call quality
- Comprehensive Fax Support: T.38 Group 3 Fax Relay (up to 14.4kbps) and G.711 Fax Pass-through ensure reliable fax transmission
- Rich Telephony Features: Caller ID, call waiting, call transfer, 3-way conferencing, call forwarding, and more
- Enterprise-Grade Security: SRTP media encryption, TLS/SIPS/HTTPS control, and secure provisioning with AES encryption
- Flexible Provisioning: Multiple provisioning methods including HTTP, HTTPS, TFTP, TR-069, and automated deployment
- Compact Design: Small footprint (5.12" x 3.54" x 1.12") fits easily on any desk or shelf
Modernize Your Communications
The HT812 V2 offers an economical solution for businesses transitioning to VoIP while preserving their investment in analog telephony equipment. The device features dynamic jitter buffer management and advanced line echo cancellation to deliver crystal-clear voice quality, even on challenging network conditions. Its gigabit Ethernet ports ensure that your voice traffic won't bottleneck your network, making it suitable for bandwidth-intensive business environments.
Whether you're a small business looking to reduce telephony costs, a remote office needing reliable fax capabilities, or a home user wanting to integrate legacy phones with a modern VoIP service, the HT812 V2 delivers the performance and features you need. The built-in NAT router functionality eliminates the need for additional networking equipment, streamlining installation and reducing overall deployment costs.
Technical Specifications
- Manufacturer: Grandstream
- Model: HT812 V2
- Network Interfaces: 2x 10/100/1000Mbps RJ45 ports
- Telephone Interfaces: 2x RJ11 FXS ports
- Voice Compression: G.711 with Annex I (PLC) and Annex II (VAD/CNG), G.722, G.723.1, G.729A/B, G.726-32, iLBC, Opus, dynamic jitter buffer, advanced line echo cancellation
- Telephony Features: T.38 compliant Group 3 Fax Relay (up to 14.4kbps) and G.711 Fax Pass-through
- Call Features: Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference
- Provisioning: HTTP, HTTPS, SSH, TFTP, TR-069, secure and automated provisioning using AES encryption, syslog
- Security: Media: SRTP; Control: TLS/SIPS/HTTPS
- SIP Standards: SDP (RFC 2327), Refer (RFC 3515), Offer/Answer (RFC 3265), SIP V2.0 (RFC 3261, 3262, 3264), SIP Session Timer (RFC 4028)
- Dimensions (W x D x H): 5.12" x 3.54" x 1.12"
- Mounting: Desktop
Included
- 1x HT812 V2 Analog Telephone Adapter Unit
- 1x 12V Universal Power Adapter
- 1x Ethernet Cable (RJ45)
- 1x Quick Installation Guide
- 1x GPL License
Why Buy from PC Liquidations
When you purchase the Grandstream HT812 V2, you're backed by over 250,000 happy customers who have trusted us for their technology needs. Every product comes with a warranty for your peace of mind, ensuring your investment is protected. Our commitment to quality means you can deploy this telephony solution with confidence, knowing it will deliver reliable performance for years to come.
Ready to upgrade your business communications? Order your Grandstream HT812 V2 today and start enjoying the benefits of modern VoIP technology while keeping your trusted analog devices in service.

New Product
These products are brand new and have never been used. They arrive in the original manufacturer packaging in pristine, factory-fresh condition.
HT812 V2 2-port Technical Specs
| Manufacturer | Grandstream |
|---|---|
| Model | HT812 V2 |
| Networking Interfaces | 2x 10/100/1000Mbps RJ45 ports |
| # of Telephone Interfaces | 2x RJ11 FXS ports |
| Voice Compression | G.711 with Annex I (PLC) and Annex II (VAD/CNG), G.722, G.723.1, G.729A/B, G.726-32, iLBC, Opus, dynamic jitter buffer, advanced line echo cancellation |
| Fax Support | T.38 compliant Group 3 Fax Relay (up to 14.4kbps) and G.711 Fax Pass-through |
| Telephony Features | Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference |
| Provisioning | HTTP, HTTPS, SSH, TFTP, TR-069, secure and automated provisioning using AES encryption, syslog |
| Security | Media: SRTP; Control: TLS/SIPS/HTTPS, SDP(RFC 2327), Refer (RFC 3515), Offer/Answer (RFC3265) SIP V2.0 (RFC 3261, 3262, 3264), RFC3261 ETC (3GPP TS 24.629, RFC 3515, RFC 3891, RFC 3892) SIP Session Timer (RFC 4028) |
| Dimensions (WxDxH) | 5.12" x 3.54" x 1.12" |
| Mounting | Desktop |
| Included | 1x HT812 V2 Analog Telephone Adapter Unit 1x 12V Universal Power Adapter 1x Ethernet Cable (RJ45) 1x Quick Installation Guide 1x GPL License |
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- No restocking fees, ever
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1-Year Warranty
- Covers defects & functional failures
- Normal business use, from date of purchase
- Batteries: 90 days (consumable)
- Excludes misuse, modification, mishandling
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