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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
4.5 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Best ever dog toy
Color: Pink
This is such the clever toy and actually I think it makes my pup more clever too. The ball is tough enough to withstand excessive chewing. I really can’t say enough good things about this particular dog toy. This will keep my dogs attention for such a long period of time and you can truly just watch the wheels turning in his head as he figures out how to get the food out would buy again and I probably will just to have a back up.
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Fun lil ball
Color: Pink
My 1.6 lb yorkie puppy loves to get her treats from here. She gets them in no time. Lol
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Treat Puzzle Ball
Color: Pink
This seems very decently made, keeps puppy occupied, easy to use
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Reviewed in the United States on March 2, 2026
★★★★★ 4
Great for 22 pound mini schnauzer/mini greyhound mix
Color: Pink
I have a dog that is half miniature schnauzer and they love to sniff and snuffle. He is enjoying this ball. I put the little freeze dried liver cubes in it and he will play with it until he gets them all out, and maybe keep playing for a bit. I can't give it 5 stars because I don't know quite how I'm going to clean the inside of it. I can't speak for how well it cleans his teeth because he hasn't had it that long. It is sturdy. He's a 22 pound medium size dog and I'm confident he cannot chew it to the point of destroying it. He's barely made a scratch on it so it may break down over time but it's not something a small or medium dog should be able to chew through the first day. He's had it about 2 weeks and we use it every day and it's holding up very well. It's not interesting enough to him to play with it without treats in it but he rarely plays with a toy unless I'm actively playing with the other end of the toy or throwing it for him to chase (part Italian greyhound too so he does like chasing) but he will get excited when he sees this ball as he knows treats are going to be in it. This one is a good size for him and he can pick it up with his teeth. (This is the hot pink one with the blue ball inside) Definitely worth the price if I can figure out how to sufficiently clean inside of it. So far rinsing with warm water seems to keep it hygienic. It's silicone so everything pretty much slides out. I wouldn't put any moist treats in it though. It's quiet. No squeaker, but he has plenty of toys that squeak and we didn't get it for that. It definitely appeals to his sniffing and snuffling instincts.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
nice
Color: Blue, Color: Blue
Smaller than I thought it would be. but it’s a good toy my Frenchie likes it
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Reviewed in the United States on December 25, 2025