--- product_id: 38062621 title: "Grandstream Powerful 2-Port ATA with Gigabit NAT Router" brand: "grandstream" price: "3812837₫" currency: VND in_stock: true reviews_count: 13 category: "Grandstream" url: https://www.desertcart.vn/products/38062621-grandstream-powerful-2-port-ata-with-gigabit-nat-router store_origin: VN region: Vietnam --- # Dual Gigabit ports for blazing speed 2 SIP profiles via 2 FXS ports TLS & SRTP encryption for secure calls Grandstream Powerful 2-Port ATA with Gigabit NAT Router **Brand:** grandstream **Price:** 3812837₫ **Availability:** ✅ In Stock ## Summary > 📡 Power your calls with speed, security, and style! ## Quick Answers - **What is this?** Grandstream Powerful 2-Port ATA with Gigabit NAT Router by grandstream - **How much does it cost?** 3812837₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/38062621-grandstream-powerful-2-port-ata-with-gigabit-nat-router) ## Best For - grandstream enthusiasts ## Why This Product - Trusted grandstream brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rock-Solid Call Security:** Advanced TLS and SRTP encryption safeguard your calls and accounts from prying eyes. - • **Compact & Discreet Design:** Sleek, low-heat device fits anywhere without disrupting your workspace vibe. - • **Future-Proof & Customizable:** Robust settings and multiple backup options let you tailor your VoIP experience like a pro. - • **Blazing Fast Gigabit Routing:** Dual Gigabit ports deliver up to 100Mbps NAT routing speeds, keeping your network lightning quick. - • **Seamless Dual-Line Connectivity:** Manage two SIP profiles effortlessly with 2 FXS ports—perfect for multitasking pros. ## Overview The Grandstream HT812 is a powerful 2-port analog telephony adapter featuring dual FXS ports supporting 2 SIP profiles, dual Gigabit Ethernet ports enabling NAT routing speeds up to 100Mbps, and advanced TLS/SRTP encryption for secure VoIP calls. Compact and efficient, it’s designed for professionals seeking reliable, high-quality voice communication with customizable settings and robust security. ## Description GRANDSTREAM HANDYTONE HT812 DUAL PORT ANALOG TELEPHONY ADAPTER 2 FXS Review: 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). Review: 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. ## Features - Supports 2 SIP profiles through 2 FXS ports and dual Gigabit ports - Includes a built-in NAT router which can handle routing speeds up to 100MBps - TLS and SRTP security encryption technology to protect calls and accounts ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #216,696 in Office Products ( See Top 100 in Office Products ) #7 in VoIP Telephone Routers | | Customer Reviews | 4.3 out of 5 stars 477 Reviews | ## Product Details - **Brand:** Grandstream - **Model Name:** HT812 - **Special Feature:** WPS - **Compatible Devices:** Personal Computer - **Recommended Uses For Product:** Security - **Included Components:** 1 - **Connectivity Technology:** Ethernet - **Item Weight:** 0.29 Kilograms - **Number of Ports:** 2 - **Control Method:** Remote ## Images ![Grandstream Powerful 2-Port ATA with Gigabit NAT Router - Image 1](https://m.media-amazon.com/images/I/61IbQl+Lp+L.jpg) ![Grandstream Powerful 2-Port ATA with Gigabit NAT Router - Image 2](https://m.media-amazon.com/images/I/61YTEysgAuL.jpg) ![Grandstream Powerful 2-Port ATA with Gigabit NAT Router - Image 3](https://m.media-amazon.com/images/I/61tYGZjAhIL.jpg) ## Questions & Answers **Q: Does it work with google voice? if it does then how hard is it to setup with google voice as compared to obi devices?** A: Yes googlevoice can be added Get an account at https://www2.pbxes.com/ add googlevoice trunks to pbxes.com and setup extensions on HT812 more details here http://nerdvittles.com/?p=26971 **Q: Will this convert digital voip signal to analog on a stand alone caller id unit? (connected to a point of sale system).** A: Yes. You will connect the device to your internal or external SIP service, then it will ring and pass through the caller ID between the rings, just like a regular phone line. Also, the caller ID is enabled by default. **Q: What firmware and hardware rev will I get when I purchase it today?** A: Dear Customer, Hardware Version: V4.0A Part Number -- 9610005040A Software Version: Program -- 1.0.35.4 Bootloader -- 1.0.35.1 Core -- 1.0.35.3 Base -- 1.0.35.4 CPE -- 1.0.4.5 Best Regards, Flytec Computers. **Q: Can this be set up to connect as an openvpn client?** A: OpenVPN client support was added to the Grandstream HT812 firmware version 1.0.29.8 and later. This means that if your device is running firmware version 1.0.29.8 or later, you should be able to set up the HT812 as an OpenVPN client. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very impressive- lots of setup details though *by L***X on October 23, 2025* 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). ### ⭐⭐⭐⭐⭐ Great way to save your landline number *by D***W on June 18, 2024* 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. ### ⭐⭐⭐⭐⭐ GrandStream HT812 ATA works great for VoIP *by X***R on April 16, 2025* Really great product for VoIP. Used multiple phones from old TrimLine to Panasonic wireless phones. Once you get the dozen or so options (out of a couple hundred) correctly set your good to go. You do need a solid internet connection and when power goes out the phone also goes out unless you have both your internet devices and the GrandStream on a power backup. I have a HT812 on Quantum Fiber. ## Frequently Bought Together - Grandstream Powerful 2-Port ATA with Gigabit NAT Router - Grandstream GS-HT814 4 Port Ata with 4 Fxs Ports and Gigabit NAT Router Voip Phone and Device, Black - Grandstream 2-FXS Port Analog Telephone Adapter (HT802) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/38062621-grandstream-powerful-2-port-ata-with-gigabit-nat-router](https://www.desertcart.vn/products/38062621-grandstream-powerful-2-port-ata-with-gigabit-nat-router) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-19*