Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
Grandstream SIP ATA 2 Port FXS Gateway | HT-812Bridge Your Analog Devices to a Powerful VoIP Network Unlock the full potential of VoIP technology without abandoning your trusted analog devices with the Grandstream HT812. This advanced 2 port Analog Telephone Adapter (ATA) allows you to seamlessly connect analog phones and fax machines to any VoIP network, making it an ideal solution for home and office environments. Built with Grandstream's market leading SIP ATA gateway technology, the HT812
Bridge Your Analog Devices to a Powerful VoIP Network
Unlock the full potential of VoIP technology without abandoning your trusted analog devices with the Grandstream HT812. This advanced 2-port Analog Telephone Adapter (ATA) allows you to seamlessly connect analog phones and fax machines to any VoIP network, making it an ideal solution for home and office environments. Built with Grandstream's market-leading SIP ATA/gateway technology, the HT812 delivers exceptional voice quality and reliability. It features two FXS ports and an integrated Gigabit NAT router, providing powerful performance and routing capabilities up to 100MBps. Experience crystal-clear conversations thanks to support for wideband HD codecs.
Key Features:
- Connect 2 Analog Devices: Supports 2 SIP profiles across 2 FXS ports, allowing you to connect two separate analog phones or fax machines.
- High-Speed Performance: Equipped with dual 10/100/1000Mbps Gigabit ports and an integrated NAT router for outstanding network performance.
- Robust Security: Protect your calls and accounts with state-of-the-art TLS and SRTP security encryption technology.
- Advanced Telephony: Supports essential features like 3-way voice conferencing per port, call waiting, call transfer, and a wide range of caller ID formats.
- Reliable Fax-over-IP: Features support for T.38 Fax protocol for dependable faxing over your IP network.
- Effortless Provisioning: Automated provisioning options, including TR-069 and XML config files, make deployment and management simple, especially with Grandstream's UCM series of IP PBXs for Zero Configuration provisioning.
- Failover Protection: A failover SIP server automatically switches to a secondary server if the main one loses connection, ensuring continuous service.
Technical Specifications
| Interfaces | |
| Telephone Interfaces | Two (2) RJ11 FXS ports |
| Network Interfaces | Two (2) 10/100/1000Mbps RJ45 ports |
| LED Indicators | POWER, LAN, WAN, PHONE1, PHONE2 |
| Factory Reset Button | Yes |
| Voice, Fax, Modem | |
| Telephony Features | Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference |
| Voice Codecs | G.711 with Annex I/II, G.722, G.723.1, G.729A/B, G.726, iLBC, OPUS, dynamic jitter buffer, advanced line echo cancellation |
| Fax over IP | T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through |
| Short/Long Haul Ring Load | 3 REN, up to 1km on 24AWG line |
| Caller ID | Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID |
| Disconnect Methods | Busy Tone, Polarity Reversal/Wink, Loop Current |
| Signaling & Control | |
| Network Protocols | TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, SSH, STUN, SIP (RFC3261), SIP over TCP/TLS, SRTP, TR-069 |
| QoS | Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) |
| DTMF Method | In-audio, RFC2833 and/or SIP INFO |
| Provisioning and Control | HTTP, HTTPS, SSH, TFTP, TR-069, secure and automated provisioning using AES encryption |
| Security | |
| Media | SRTP |
| Control | TLS/SIPS/HTTPS |
| Management | Syslog support, SSH, remote management using web browser |
| Physical | |
| Universal Power Supply | Input: 100-240VAC, 50-60Hz; Output: 12V/0.5A |
| Dimensions | 28.5 x 130 x 90 mm (H x W x D) |
| Weight | 353.33g |
| Environmental | |
| Operational Temperature | 32º – 104ºF or 0º – 40ºC |
| Storage Temperature | 14º – 140ºF or -10º – 60ºC |
| Humidity | 10 – 90% Non-condensing |
| Compliance | FCC/CE/RCM |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 395 reviews
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Product Reviews
★★★★★ 4
Good fit, good construction.
Style: CA12289
This filter was a good fit for my Corolla. It appears to be well made. The gasket is resilient and looks like it would seal well, preventing any leakage past the filter. Construction was good, with no holes or gaps in the filter paper itself. Unfortunately, the buyer usually has no way to judge the performance of an air filter, and I'm no exception, so I can't say how effective it is in actually removing dirt from the air going into the engine. But I would buy this filter again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 21, 2025
★★★★★ 5
Fits my 2026 civic sport perfect!
Size: AF151
No issues, fitment is perfect. Great quality for an excellent price. Dealer wanted like $24 for a basic one. Nah I'm good I'll just go on Amazon and get it for $8. Took 30 seconds from start to finish can't get any easier.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Fits well and installs easily.
Size: AF997
This filter looked about the same as the OEM filter. It installed in about a minute. The quality appeared to be fine. It was protected in a cardboard box. It fit my 2014 Subaru Outback perfectly. I just installed it an hour ago so I don’t have any long term observations about longevity or effectiveness. I can’t see any reason why it would not work as well as the original, it seemed identical.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great filter
Size: AF259
This fit my Mazda CX-5 perfectly. I'm happy with the seal and quality. Great price. I will certainly reorder for my next replacement.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Great fit and quality
Size: AF113
Not a complicated product, but after going to 2 different auto parts stores and this not being in stock, Amazon to the rescue. Arrived the next day and the quality is definitely on par with “store brand” ones from retailers. Definitely cheaper as well.
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Reviewed in the United States on April 23, 2026
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