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📡 Future-proof your office calls with Grandstream HT812 — where legacy meets lightning speed!
The Grandstream HT812 is a professional-grade VoIP analog telephone adapter featuring 2 FXS ports and dual Gigabit Ethernet ports with a built-in NAT router supporting up to 100Mbps routing speeds. It ensures secure communications through TLS and SRTP encryption and simplifies large-scale deployments with automated provisioning options like TR-069 and XML configuration. Ideal for businesses aiming to integrate traditional analog phones into modern VoIP networks without compromising on speed, security, or reliability.
| ASIN | B01M2ZJQAF |
| Antenna Location | Business |
| Best Sellers Rank | #384,184 in Electronics ( See Top 100 in Electronics ) #1 in VoIP Routers |
| Box Contents | Analog telephone adaptor, network cable, power adaptor and stand |
| Brand | Grandstream |
| Brand Name | Grandstream |
| Colour | Black |
| Compatible Devices | Laptop, Personal Computer, Smart Television, Smartphone, Tablet |
| Connectivity Protocol | SIP |
| Connectivity Technology | Ethernet |
| Control Method | App |
| Country of Origin | China |
| Customer Reviews | 4.3 out of 5 stars 479 Reviews |
| Data Transfer Rate | 100 Megabits Per Second |
| Frequency Band Class | Single-Band |
| Global Trade Identification Number | 06947273702153 |
| Has Internet Connectivity | Yes |
| Is Electric | No |
| Item Dimensions L x W x H | 33L x 22.9W x 7.1H Centimeters |
| Item Weight Unit of Measure | 0.29 Kilograms |
| LAN Port Bandwidth | 10/100/1000 megabits per second |
| Manufacturer | Grandstream, Grandstream Networks |
| Manufacturer Contact Information | Grandstream Networks |
| Manufacturer Part Number | HT-812 |
| Maximum Upstream Data Transfer Rate | 100 Megabits Per Second |
| Model Name | HT812 |
| Model Number | HT-812 |
| Number of Ports | 2 |
| Operating System | RouterOS |
| Other Special Features of the Product | Automated provisioning options include TR-069 and XML config files, Failover SIP server automatically switches to secondary server if main server loses connection, Includes a built-in NAT router which can handle routing speeds up to 100MBps, Supports 2 SIP profiles through 2 FXS ports and dual Gigabit ports, Supports 3-way voice conferencing, Supports T.38 Fax for creating Fax-over-IP, Supports a … |
| Recommended Uses For Product | Business |
| Router Network Type | wired |
| Security Protocol | AES |
| Special Feature | Automated provisioning options include TR-069 and XML config files, Failover SIP server automatically switches to secondary server if main server loses connection, Includes a built-in NAT router which can handle routing speeds up to 100MBps, Supports 2 SIP profiles through 2 FXS ports and dual Gigabit ports, Supports 3-way voice conferencing, Supports T.38 Fax for creating Fax-over-IP, Supports a wide range of caller ID formats, TLS and SRTP security encryption technology to protect calls and accounts, Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning Special Feature Automated provisioning options include TR-069 and XML config files, Failover SIP server automatically switches to secondary server if main server loses connection, Includes a built-in NAT router which can handle routing speeds up to 100MBps, Supports 2 SIP profiles through 2 FXS ports and dual Gigabit ports, Supports 3-way voice conferencing, Supports T.38 Fax for creating Fax-over-IP, Supports a wide range of caller ID formats, TLS and SRTP security encryption technology to protect calls and accounts, Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning See more |
| UPC | 753459331842 |
| Unit Count | 1.00 Count |
| Voltage | 28 Volts |
A**R
Not worthy
After few hours in working, not getting incoming calls
T**E
Compatible with Zen's UK "BT digital voice" switchover
Bought as I'm a zen.co.uk customer, and have UniFi throughout the house (I don't use the Fritzbox). With the BT/UK "digital voice" switchover in full-swing, I wanted a means to keep our old land line alive. This worked perfectly. Configuration hasn't been utterly straight-forward, but I've finally found the following settings work (for Zen customers): - Ensure your NAT/firewall is forwarding the required ports through to the Grandstream (5060/UDP from 212.23.7.228, and 20000-30000/UDP from 62.3.88.0/28 and 62.3.88.16/28) - Primary SIP server: voip.zen.co.uk - Secondary SIP server: voip2.zen.co.uk - Prefer Primary SIP server: No - Outbound proxy: Blank/None - Allow DHCP Option 120: No - SIP Transport: UDP - NAT traversal: No - DNS Mode: A Record - DNS SRV: No - Fallback Timer: 60 - Use Request Routing ID in SIP INVITE Header: No - Sip Registration: Yes - Outgoing Call without Registration: Yes - Register Expiration: 5 - Enable SIP OPTIONS/NOTIFY keep alive: No - Local SIP port: 5060 - Local RTP port: 5004 - Random SIP port: No - Random RTP port: No - Enable RTCP: Yes - Hold Target Before Refer: Yes - Refer-To Use Target: No - Remove OBP: No - Support SIP Instance ID: Yes - Validate Incoming SIP Message: No - Use Privacy Header: No - Use P-Preferred-Identity Header: Yes - Use P-Access-Network-Info Header: Yes - Use P-Emergency-Info Header: Yes - Use P-Asserted-Identity Header: No - SIP REGISTER Contact Header Uses: LAN - Caller ID Fetch Order: Auto - DTMF: RFC2833 - SLIC: UK - Caller ID Scheme: SIN 227 - Dial Plan: (You may want to customise) ... { 999 | 10[015] | 11[129] | 11[68]xx | 1[45]7[1-2] | <0=44>8001111 | <0=44>845464x | <0=44>[1235789]xxxxxxxxx | <=441638>23456789]xxxxx | 1410[1235789]xxxxxxxxx | x+ }
D**W
Great way to save your landline number
Although landlines are largely replaced with cell phones, you may have a reason to hold onto an old number. This was the case for us having owned a line for many years, but the rising costs had become unreasonable ($45/mo), just to keep a line that rarely gets used. I began looking at alternatives, and two stood out: give up the line entirely, or port the number to a VoIP provider. Some of you might say to port the number to a cell plan, but even $15 per month on a prepaid plan would feel wasteful. So, before ditching the line, I looked into VoIP, which honestly is a bit confusing. Some providers sell hardware/devices and bundle the service with that, others use stand-alone devices. I looked into the bundled service + device route first but those seem to have really bad customer service or quality of service reviews. Their pricing can also be quite deceptive on what you would actually pay. After that I saw a few recommendations for a VoIP provider based out of Canada as having great pricing and works with a variety of stand-alone devices like this Grandstream. I went this route and am very pleased with the result. For starters, my family can’t even tell anything changed. After a few days my landline number ported successfully to the new provider. Incoming and outgoing calls work just like they did before, and the sound quality seems the same. The Grandstream device itself works great. I am not using this as a router, I just plug it into an open LAN port on my network, and then run a line to my existing cordless home phone. It is small, doesn’t get very warm, and isn’t obnoxious with its indicator lights. Programming the device to connect with the VoIP provider did require following a guide, and the UI isn’t the best looking but gets the job done. The good thing is once you get it connected and working, you’ll probably never need to touch it again. Opportunities for improvement - Updating to the latest firmware is confusing – why is the wrong update URL set at the factory? I was able to update after finding instructions online. Also, the WebUI feels like a throwback to setting up an old router from the 90s.
L**S
Funciona, sólo para expertos en el área de redes
Lo probé con Megacable conectando el módem a modo puente con este dispositivo usando la VLAN 559 y funciona de maravilla. Es importante que la cuenta SIP se puede tener activa en un dispositivo a la vez.
M**K
Works great with Starlink
Just been fitted. Very happy. Great idea if you don't want a normal house telephone line. Works great with Starlink.
G**N
Erfüllt voll und ganz seinen Zweck
Das Gerät an sich ist gut verarbeitet. Leider fehlt eine vernünftige Bedienungsanleitung, daher auch nur 2 Sterne für die Installation. Doch dank der genauen Beschreibung von Herrn Müller, konnte auch ich als Leihe das Gerät installieren und programmieren. Jetzt verrichtet es seinen Dienst. Es folgt auf ein DECT Gerät der Firma Wantec, was von der Installation her wesentlich einfacher gestaltet war, da es über Funk arbeitet. Allerdings war dieses Gerät mal wieder defekt (in 5 Jahren das 4) und auch nicht mehr zeitnah lieferbar. Der Grandstream kam schon einen Tag früher als angekündigt und ist auch recht ansehnlich. Über die Haltbarkeit kann ich natürlich noch nicht wirklich Auskunft geben, da er erst seit heute in Betrieb ist. Ich kann jedem nur empfehlen die Anleitung zur Einrichtung von Herrn Müller zu nutzen, dann funktioniert auch alles.....
Trustpilot
3 weeks ago
1 week ago