Pay in installments of $198.89 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 16 - Jul 21
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Grandstream SIP ATA FXO/ FXS Gateway | HT-813Bridge Your Analog and VoIP Worlds with the Grandstream HT813 The Grandstream HT813 is a powerful and compact hybrid analog telephone adapter (ATA) designed to seamlessly integrate your traditional analog telephone devices with a modern VoIP network. This versatile gateway features one analog telephone FXS port and one PSTN line FXO port, enabling you to leverage the benefits of VoIP while maintaining a connection to your existing landline. The HT813
Bridge Your Analog and VoIP Worlds with the Grandstream HT813
The Grandstream HT813 is a powerful and compact hybrid analog telephone adapter (ATA) designed to seamlessly integrate your traditional analog telephone devices with a modern VoIP network. This versatile gateway features one analog telephone FXS port and one PSTN line FXO port, enabling you to leverage the benefits of VoIP while maintaining a connection to your existing landline. The HT813 is the perfect solution for small businesses and home users looking to upgrade to a flexible and cost-effective communication system.
Key Features and Benefits
- Hybrid Connectivity: Equipped with both an FXS port to connect an analog phone or fax machine and an FXO port for a PSTN line, the HT813 offers a unique and flexible communication solution.
- Lifeline Support: In the event of a power outage, the HT813 provides lifeline support by automatically relaying the FXS port to the FXO port, ensuring you can still make and receive calls on your traditional landline.
- Advanced VoIP Functionality: Supports 2 SIP profiles, 3-way voice conferencing per port, and a failover SIP server that automatically switches to a secondary server if the main one loses connection.
- Reliable Fax over IP: Features support for the T.38 Fax protocol, ensuring reliable and efficient faxing over your IP network.
- Robust Security: Your calls and accounts are protected with strong AES encryption and a unique security certificate per unit.
- Easy Provisioning and Management: Offers automated and secure provisioning options using TR-069, simplifying deployment and management.
Technical Specifications
| Interfaces | One (1) RJ11 FXS port, One (1) RJ11 FXO PSTN line port with lifeline support |
| Network Interface | Two (2) 10/100Mbps ports (RJ45) with integrated NAT router |
| LED Indicators | POWER, LAN, WAN, FXS, FXO |
| Factory Reset Button | Yes |
| 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 (PLC) and Annex II (VAD/CNG), 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 24 AWG |
| Caller ID | Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID |
| Disconnect Methods | Busy Tone, Polarity Reversal/Wink, Loop Current |
| Network Protocols | TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, 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, TELNET, TFTP, TR-069, secure and automated provisioning using AES encryption |
| Security | SRTP, TLS/SIPS/HTTPS |
| Physical | Universal Power Supply: Input: 100-240VAC, 50-60Hz, Output: 12V/0.5A |
| Environmental | Operating: 32º – 104ºF or 0º – 40ºC, Storage: 14º – 140ºF or -10º – 60ºC, Humidity: 10 – 90% Non-condensing |
| Dimensions and Weight | 25mm x 115mm x 75mm (H x W x D) |
| 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
4.1 ★★★★★
Based on 18 reviews
Sort
Product Reviews
★★★★★ 5
Superior Quality & Effective
Size: 90 Count (Pack of 1)
Thorne Magnesium is a total game changer! The quality is exceptional, and it has finally helped me get the restful sleep I've been missing. I’ve struggled with insomnia and tried numerous other brands to no avail, but Thorne is truly superior. It is absolutely worth the investment for results that actually work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 5
Recommend
Size: 90 Count (Pack of 1)
Excellent quality supplement. Easy on the stomach and helps with relaxation and sleep. You can really feel the difference. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 5
Beneficial Sleep Benefits
Size: 90 Count (Pack of 1)
I have just started taking this item and it seems to work. My sleep is better, deeper and I awaken feeling rested. I strongly hope that this item will continue giving me great sleep results! The Magnesium is very beneficial too. I would recommend this supplement! I will purchase again provided it keeps working!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 4
Reliable
Size: 90 Count (Pack of 1)
The brand has a good reputation. I prefer to order products with the Thorne brand than others, because of its reputation.
The magnesium by Thorne is well worth the price. It is reputable and for sleep it works well. Other health benefits are included so not just for sleep but overall health. Good product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
★★★★★ 5
Great brand great quality
Size: 90 Count (Pack of 1)
I bought this supplement during my pregnancy and absolutely love the quality of Thor supplements. It mainly contains magnesium and I highly recommend this brand. They use the purest ingredients and the effects are truly impressive. Since magnesium can cause side effects I was pleased to find this one didn’t have any for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026