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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
4.5 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 2
Nice but runs small
Size: 7 Big Kid, Color: Navy
The sandals are nice and not to hard or flimsy but they are cut very small.
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Reviewed in the United States on April 22, 2026
★★★★★ 4
Solid Kids Sandals, Overpriced Like Most Kids Shoes 🌞
Size: 11 Little Kid, Color: Brown, Size: 11 Little Kid, Color: Brown
My son hasn’t worn these yet since it’s December in Indiana and sandals + snow obviously don’t mix. 😂 So this review is based on first impressions rather than long term wear.
That said, these seem wider than a lot of typical kids’ sandals, which I REALLY appreciate since we tend to have wider feet in our family. #hobbitfeet
The quality feels pretty decent overall. They’re described as lightweight, and while they’re not insanely lightweight, they do have enough weight to feel semi-sturdy and not flimsy or cheap. I like the style and color, and I think they’ll work well for my son once warmer weather hits.
My main complaint is the price. At just under $24 at the time of this review, it feels a little high for kids’ sandals and for what these are. I really feel like $20 MAX would make more sense. Kids shoes are almost always priced like adult shoes, even though they clearly use less material, and that’s hard for me to understand and wrap my mind around. Overall, these seem solid for daily wear, I just wish the price was a bit more reasonable and affordable.
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Reviewed in the United States on December 31, 2025
★★★★★ 5
Great basic and timeless design
Size: 12 Little Kid, Color: Brown
These sandals are a great find! They’re super easy to get on and off thanks to the Velcro straps, which is a huge win for little ones learning to be more independent. The fit is adjustable and secure, so they stay in place well during all kinds of play.
The cork-style footbed is comfortable and gives good support, and the overall design feels sturdy enough to handle everyday wear. They’re lightweight but still durable, and have held up really well so far.
They also have a classic, versatile look that goes with just about everything, perfect for summer outfits. Overall, a reliable, comfortable sandal that’s great for active kids. Would definitely buy again!
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Great option for boys or girls
Size: 13 Little Kid, Color: Black, Size: 13 Little Kid, Color: Black
This is really more of a unisex option for a sandal. I have sandals that look like this, and both of my children have worn this style. I ordered these for my daughter, with the plan to pass them down to my son if they're not too worn when she outgrows them. The style is very minimalistic, so it goes with lots of outfits. All the straps are easily adjustable, so you can get a good fit. I would say the length is true to size, but the width is maybe a bit wide. Nevertheless, the adjustable straps really help them fit well. They feel really sturdy and I appreciate that the sole has cushion to it. My daughter has worn these every day since I got them out of the closet and they're holding up well.
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Reviewed in the United States on February 19, 2026
★★★★★ 5
Fast shipping
Size: 5 Big Kid, Color: Black
Good sandals, the kid just didn't want them. Fast shipping and easy returns!
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Reviewed in the United States on June 11, 2026