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- USA
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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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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
4.3 ★★★★★
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Product Reviews
★★★★★ 5
Fun toy
Color: Orange
My standard poodle loves this toy. It holds a charge for several hours and is well made
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Amazing Buy
These masks are exactly what they say on the package. 10/10 Clears, smooths, and moisturizes your face. Keep on over night, easy to use
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Favorite for dry climate
I live in a dry desert and these are the only moisturizing masks I see instant results. For best results after doing my evening skincare routine I apply the mask one hour before bed. I store them in the fridge so they feel cool and soft on my skin. Once you get the hang of applying them it’s very easy the second time. I sleep with them on and remove them in the morning and my skin is glowing, plump and pores appear smaller. The mask itself is a thick durable jelly not like the typical sheet masks. The price for this is worth it if you wear the mask minimum 2-5 hours once a week
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Reviewed in the United States on November 12, 2025
★★★★★ 5
Youth Serum?
You will not regret trying this! The results are amazing!!! 🤩 After the first use my skin looked healthier, brighter, more even toned and pores were diminished. I look young again. (I’m 57.)
I have neglected my face for a few years after being the kind of girl who never left the house without makeup. I knew I needed some deep repair and thought a mask would help. Lo and behold, my beloved Amazon gave me Biodance! I just used my third mask last night and I’m still excited to peel it off the next morning. My face doesn’t look all dewy like the pictures and video but it’s definitely a huge improvement. I didn’t realize it was that dry. A couple tips-don’t worry when you first apply it if it’s not perfectly positioned. There is wiggle room and it will slide a bit. Handle carefully! It’s slimy & slippery. You can use the eyes and lips (cut outs) for other problem areas and you can tear off the nose as well. It feels cooling the moment you put it on. I had no irritation at all. I took the advice of one reviewer and sat on the couch with my head leaned back for about an hour before I went to bed to let it dry a little. Nice “ME” time. Thanks a zillion Amazon and Biodance! I vow to use a mask weekly from now until the end of time. ❤️
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Reviewed in the United States on December 14, 2025
★★★★★ 5
Cool Product
I love these masks. The are cool and white in color when you put them on and they turn clear when the stuff is absorbed. I was new to a mask that has to be on 3 hours or more, but it was cool. I had very little skin irritation and I have sensitive skin. They are very easy to put on and take off. They have a heavy cooling sensation when you first put them on because the are really wet, but it dissipated over time and was comfortable to sleep in. I use these masks twice a week. I will definitely keep using them. My skin feels softer and more firm in the morning. I just take off the mask and apply a little moisturizer with sunscreen and I'm good for the day.
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Reviewed in the United States on December 13, 2024