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📡 Future-proof your calls with Grandstream HT812 — where legacy meets lightning-fast VoIP!
The Grandstream HT812 is a professional-grade VoIP analog telephone adapter featuring 2 FXS ports for connecting legacy phones, dual Gigabit Ethernet ports with a built-in NAT router supporting up to 100Mbps routing speeds, and advanced TLS/SRTP encryption for secure voice communication. Designed for both home and office environments, it supports automated provisioning via TR-069 and XML config files, ensuring scalable deployment and reliable failover SIP server functionality for uninterrupted connectivity.
| ASIN | B01M2ZJQAF |
| Batteries | 1 AAAA batteries required. |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #324,790 in Electronics ( See Top 100 in Electronics ) #1 in VoIP Routers |
| Brand | Grandstream |
| Colour Screen | No |
| Compatible Devices | Laptop, Personal Computer, Smart Television, Smartphone, Tablet |
| Connector Type | Ethernet |
| Country of Origin | China |
| Customer Reviews | 4.3 4.3 out of 5 stars (470) |
| Data Transfer Rate | 100 Megabits Per Second |
| Date First Available | 17 November 2016 |
| Does it contain liquid? | No |
| Has Auto Focus | No |
| Imported By | Pure Life office system |
| Includes Rechargeable Battery | No |
| Includes remote | No |
| Item Dimensions LxWxH | 22.9 x 33 x 7.1 Centimeters |
| Item Weight | 290 g |
| Item model number | HT-812 |
| Manufacturer | Grandstream |
| Model | HT-812 |
| Model Year | 2016 |
| Mounting Hardware | Analog telephone adaptor, network cable, power adaptor and stand |
| Net Quantity | 1.00 Count |
| Number of Ports | 2 |
| Operating System | RouterOS |
| Product Dimensions | 22.86 x 33.02 x 7.11 cm; 290 g |
| Programmable Buttons | No |
| Special Features | 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 … |
| Standing screen display size | 5 Inches |
| 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+ }
L**X
Very impressive- lots of setup details though
We switched from Ooma to a SIP provider (VOIP.ms, but there are lots of others). We got a few more features and are saving a little money. This was a little tricky to setup (it has lots of settings). Most of the settings are fine if left at default, but it's capable of encrypting traffic and a whole bunch of other stuff and there are settings for every possible feature. In fact, there are five or six options to backup/restore the configuration (seems like any of them will work, though).
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.
A**N
Just works.
Just works. Purchased to replace a PAP2T that wouldn't ring the bell on a rotary phone.
Trustpilot
1 day ago
1 week ago