Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black

(10 customer reviews)


Brand Grandstream
Color Black
Number of Batteries CR123A batteries required.
Material Plastic
Power Source Adapter
Item Dimensions LxWxH 4 x 4 x 1 inches
Answering System Type Digital
Item Weight 0.25 Pounds
Conference Call Capability 3-way
Caller Identification No
  • Supports 2 SIP profiles through 2 FXS ports and a single 10/100Mbps port
  • Tls and SRTP security encryption technology to protect calls and accounts
  • Automated provisioning options include TR-069 and XML Config files
  • Supports 3-way voice Conferencing
  • Failover SIP server automatically switches to secondary server if Main server loses connection


The HT802 is a 2 port analog telephone adapter (ATA) that allows users to create a high-quality and manageable IP telephony solution for residential and office envir onments. Its ultra-compact size, voice quality, advanced VoIP functionality, security protection and auto provisioning options enable users to take advantage of VoIP on analog phones and enables service provider s to offer high quality IP service. The HT802 is an ideal ATA for individual use and for large scale co mmercial IP voice deployments.

Additional information

Weight 4 kg
Dimensions 4 × 4 × 1 cm
Product Dimensions

4 x 4 x 1 inches

Item Weight

4 ounces



Item model number



CR123A batteries required.

Date First Available

August 26, 2016



10 reviews for Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black

  1. arecf

    Suitable replacement for now EOL’ed Obihai OBi110, however, has some limitationsBackground information:OBiTALK discontinued, on 6/7/2022, support for a variety of Obihai devices, including the OBi110 that we have been using as our VoIP ATA. As the result, we no longer had VOIP service from Anveo for our telephones and fax machine.We had been using our OBi110 for years, for both voice and fax communication, with our Anveo obitalk account. In particular, our fax machine worked fine with this set up.Based upon information from Anveo. we purchased the Grandstream HT-802 as a replacement for the Obi110. I was not able to obtain detailed open print or even sufficient) information anywhere 2 get the HT-802 to work with my Anveo account.It turned out that there was no way to get the HT-802 to work with my Anveo Obitalk account. With significant (and exceptionally good) assistance from the Anveo support rep, was able to get the HT-802 to function, however, it turns out that the HT-802 likely does not support fax communications, even at the reduced speed VoIP communications rate configuration of the fax machine, 9600 baud. By the way, Grandstream does not offer support for the HT-802. You may be able to obtain some support from the Grandstream online forum, however, if you do receive responses to your questions , the responses may be slow in coming.Outline of setup/configuration steps:Note: the following assumes that you have using Anveo as your VoIP service provider. If you have been using a different VOIP service provider, the following, in all likelihood, does not apply to you.1. The first thing that you are going to need to do is open a support ticket with Anveo, as many of the steps that are required to convert from and Obitalk account using an OBi110 to “regular” Anveo account using a Grandstream HT- 802, require Anveo to implement.2. Ask Anveo to convert your oi talk account to a “regular” “free” account. Ask them to credit the unused dollar amount portion of your obitalk account back to your account so that you can use for your “regular” account.3. You may need to change your IVR/Call Flows to the default call flow. (My call flows that worked with obitalk/OBI110 no longer functioned correctly with the HT-802.) Anveo support can make this change for you.3. Log into your account at Anveo:3a. Note your Anveo account number. This is your SIP User ID3b. In “SIP Registration Details: Note the part that follows the “@”of your SIP URL. Mine was “ “ You will need this to configure the HT-802.3c. In “SIP Registration Details: Note your password. You will need this to configure the HT-802. (The SIP password is assigned by Anveo and is not the same as the password to log in to your Anveo account.3d. In the Call Security menu, increase “Block calls with call rate more than” to $0.044. The only screen that I had to configure at the webpage for my HT-802 was at the FXS1 tab. My configuration was as follows:Summary of FZS1 configuration for Anveo for the HT-802:Primary SIP Server: User ID: your Anveo account numberAuthenticate ID: your Anveo account numberAuthenticate Password: your Anveo SIP passwordName: Your nameMaximum Number of SIP Request Retries:4SIP T1 Timeout: 1 secSIP T2 Interval: 4 sec5. After you have configured the HT-802, the Status tab should show Port Status = “Registered”6. After your HT-802 shows the status as registered, verify the following:6a. Ability to make outgoing telephone calls. Note: You will need to add a one at the beginning of the telephone number that you are dialing. Example: 1-123-456-78906b. Ability to receive telephone calls. Note: the ringing that the calling party hears may have second ring delayed by a few seconds. This is normal.6c. The following applies if you were paying Anveo for the optional E911 service. Make a test call to your local 911 and verify that they have the correct address for you.7. For sending and receiving faxes, plan to use the functionality from your Anveo account as your fax machine will likely not work with the HT-802.Good luck!

  2. dimaxp

    Inexpensive ATA that is very easy to manage and works wellReplaced an old Linksys ATA that was becoming a pain to manage and would not properly support SIP over TLS. This unit can be managed by Grandstream’s free GDMS cloud which simplify a lot of setup and management. Voice quality is good and FAX T38 passthrough is supported.

  3. Scot Sheely

    Perfect for home / home officeAfter months of research and two failed attempts with other service providers, I finally locked in on the Grandstream HT802, along with small, solidly built hard plastic unit, similar to most consumer modems & routers.The LED indicator lights on top glow a bright, pleasant blue color.The RJ-11 & RJ-45 jacks on the back are color-coded and clearly marked. The tolerances are snug when plugging in cables, which is perfect. No loose sloppy fit here! There are TWO seperate RJ-11 Phone jacks, allowing you to have 2 different phone lines, if you buy another line (less than $5 / month actual fees after activation!). Perfect for a home business, or a child’s phone line.Dislikes: only 2; the first is simply a minor irritation concerning the orientation of ports 1 & 2 for the RJ-11 telephone jack. The one on the far left, as you look at the box from the front or top view, is labeled “2”, when I personally think it should be “1”. The “1” jack is in the middle of the device. This caused a minor problem while connecting, which was quickly corrected. Many, many others also did this, as I found this issue on dozens of support forums.The other minor issue, which is a non-issue, is the old 90’s looking interface for the box, which you enter into using a web browser and the box’s IP address, found by dialing *** (3 asterisks, or stars), once your unit and phone(s) are connected. This is on the instructions for the unit, and also at’s support WIKI (which is excellent and easy to use to copy their recommended settings over to your device).FYI: We have one interface box that connects all phones in our house, upstairs and downstairs. We simply use the old copper wire that was pre-existing to this setup. When one handset rings, they all ring. This is convenient if we are upstairs and away from our main phone.This unit and Grandstream’s other similar devices are well made, extremely clear (with’s service), durable and a winner. THE SETTINGS AND CONFIGURATION ARE NOT HARD TO DO! There are about 3 pages of info to manually type in as you copy that from the support wiki. Email support was FAST…same day, less than an hour after the support ticket was submitted to voip ms, on a weekend, no less!This combination is perfect for our needs, as it may be for your home or small business.

  4. Waz

    Rotary phone on VoIP works!The product is compatible with a wide array of systems and applications. I have mine in Germany using it with an AVM FritzBox with Deutsche Telekom Service to make my landline work accross the LAN. Everything worked great once I found the correct instructions on a forum. The flexibility makes configuration a little challenging for people unfamiliar with voip and research. The manufacture cannot create instructions that meet the nuance of every application. The device seems solid and I am extremely happy something fills the voip to analog niche for home applications.

  5. honzuki

    Works great with VOIP MSI got this to use with the VOIP MS service, and it works like a champ. It will even do encrypted calls. The catch is this: setup is kind of a pain, because if you spend too much time in the setup menu, it will log you out after 10 minutes. That’s a road to frustration really fast.So make sure you set the login timeout to something like 30 minutes, because getting this setup for a service like VOIP MS will take some time.Setup is pretty difficult for a newbie, too. The menus keep changing every time they update the firmware, and some of the choices are pretty obscure or hard to understand for normal people. You’ll probably need help from your VOIP provider with setting this up.Make sure your provider supports this before buying it, because you may have to ask them for help.It took a few tries to get encrypted mode to work on my VOIP provider, and when using encrypted mode, I noticed that call quality sagged just a little bit, and there was more delay in getting a ring on the test numbers I called, but it’s not a deal-breaker for me. I don’t know if it was because of this, or on the VOIP provider’s end, or what, it’s hard to nail down for sure.If you don’t care about encrypting calls, the sound quality is great on VOIP MS.This is a solid way to get your land lines into the 21st century. You’ll have to put a little work in on the front end, but I like saving piles of money on my land line bills.

  6. Chris

    Inexpensive, works with faxSetup on this was relatively easy, mostly just following the documentation and plugging in a few values from my VoIP provider (nettalk). I bought this and not the version provided by nettalk, because I wanted to avoid any possibility of vendor-locked settings.I’m using this with an all-in-one for faxing, and while there were a couple settings to tweak these are all in the documentation; it was pretty easy and is working great. I do wish it had wifi support, which would make it easier in some rooms of our house, but overall I have no complaints, especially for the low cost.

  7. Y. J.

    3 starsI switched from OBi as their service on old devices has been discontinued. The initial setup from Grandstream wasn’t as simple as easy as Obi, but once the configuration was completed, it was easier to find and modify parameters as it has only few main panels (basic, advanced, FXS ports).There are so many features, but the adapter’s firmware needs to be revised for errors. I’ve had so many devices, and this adapter might be on top list of the most buggy ones. 1. Firmware update failed until server path was changed from default to 2. Max web session timeout is only 60min and not even working (update/apply after 10min required relogin). 3. user and viewer login directed to admin login. I guess I’ll see more errors later on.

  8. Kraig Jorgensen

    The most difficult configuration I have ever seen but I finally got it workingI had a retail business with 4 locations in two states.. I used 29 pcs and managed them just fine. Twelve yrs ago I used VoIP but without all the features. The Grandstream is loaded with config specs but I can’t get it to work with VOIP.MS WHICH IS supposed to be good. You can enter the server and your password but all you get is a busy signal after you dial or try to receive. I have tried it on 2 different Internet systems and 2 different analog phones….just a busy signal after a dial attempt or a receive attempt. I wouldn’t write this review except Buyer Beware I am changing my rating after much tech support from the supplier of the VOIP I am using. The password setup is awkward and then the changes to built in software after changes are made.

  9. Frisco

    Great option for cheap landlines if you are a little tech savvyThis is a great little device that does not try to dumb things down for users, as it offers a huge number of options. It works great with both of my deep discount VOIP providers, Anveo and Future-nine, thereby giving me “DIY” landlines for well under $100/year. Of course, if you want the reliability of a standard landline, you will need to put this device, your router, and your modem onto a UPS–but again that’s a modest upfront cost compared to the monthly cost of most full-service analog landlines.There are a few drawbacks worth mentioning, however. One is that to update the firmware from Grandstream’s web site, you must use an http, not an https URL. That seems a bit backwards for 2017, and suggests the company is not very security conscious. In fairness, the device offers complete control over the update URL, so you can also download firmware from a machine on your local network including over https. Obviously the device is targeted for enterprise users (which I am not), who will want to roll out configuration and updates from a central internal server.The second problem I had was that my phone would start randomly ringing or just emitting weird partial rings, with seemingly no caller. Upon looking at a packet trace from my border router, it turned out the Grandstream was being attacked remotely. Though the Grandstream is behind a NAT, I had configured the device to use UPnP, which made it open a port to the outside world on my router. I don’t think any of the attacks were actually succeeding in doing anything, but it was annoying that they made my phone ring at odd hours. An easy solution was to configure the Grandstream to use keepalives instead of UPnP for NAT piercing. In fact, I’d initially used UPnP because I thought keepalives might not be reliable enough for incoming calls. However, the keepalives work great and prevent random outside IP addresses from messing with my Grandstream. Since keepalives are the easiest option to set up, this is really just a result of my overthinking things. But again, they don’t inspire confidence in the device’s security, so really only consider using this on a secure network.

  10. Sgchon102

    MisinformationI bought a battery package from a third vendor, and I contacted the manufacture, and they stated that there is no place to install the battery. I have to return the battery package at my expense because I rely on the information they posted to your website when it does not require batteries.

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