The 5 Best Phone Adapters (ATAs) of 2022

Now you can easily turn your traditional landline into an IP phone

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Our collection of the best phone adapters allow you to connect your more traditional phone or fax machine to a business or home network via WiFi. Most analog telephone adapters (ATAs) resemble something like a router for phones, with traditional phone jacks for your devices and a cable to connect the ATA to your modem or otherwise hardwire it to your business or home network.

If you're using these devices for a business and need excellent security protocols, look no further than the Grandstream GS-HT802 at Amazon, with TLS and SRTP protection built-in. However, if you need an adapter with a little more portability, the MagicJack Go can literally fit in your pocket.

If you're worried about compatibility with your existing landline phones, make sure to read our guide to phones you can use with VoIP before taking a look at our collection of the best phone adapters.

Best Overall: Ooma Telo

Ooma Telo

 Courtesy of Amazon

The Ooma Telo connects your analog phone to high speed Internet, allowing you to make crystal clear and reliable phone calls through PureVoice HD technology. Ooma merges traditional functions such as voicemail, call-waiting and caller ID with more advanced features. One of the most exciting features of this VoIP router is its compatibility with some of your favorite devices, including Nest devices, several smartphone products and Amazon Echo for voice-activated dialing. Ooma promises to deliver clear calls at lightning speeds, even when the Internet is busy, thanks to a unique compression algorithm that reduces bandwidth consumption by 60 percent when compared to its competitors.

Runner-Up, Best Overall: Obihai Obi200

Obihai Obi200 Phone Adapter


Another reliable product from Obihai, the Obi200 is a somewhat simpler version of the Obi202. This analog telephone adapter has only one port instead of the two that can be found on the Obi202. While this limits the number of calls or faxes that you can make to only one at a time, the more simplified model could be perfect for someone interested in using their ATA for personal use only. This model also works with Google Voice and has all of the other functions, including T.38 fax, that are standard with VoIP connections.

Best VoiP Functionality: Obihai Obi202

Obihai Obi202 Phone Adapter


If you are looking for the perfect ATA that will work for both personal and home office needs, the Obi202 is the perfect choice. Obi202 supports 4 VoIP services and has two ports, which means that it can support two phone calls or faxes simultaneously. This system touts T.38 Real Time Fax over IP and High Quality Voice over IP. It can support all of your home office needs from conference calls, call forwarding and transfer, call waiting and voicemail. It can be set up to integrate with iPhone and Android apps and it works with Google Voice. This product is ideal for both home businesses and typical users who simply want to save money on their phone bill by using VoIP.

Most Portable: MagicJack Go

MagicJack Go Phone Adapter


Another option for users interested in an ATA that will significantly reduce the cost of local and long distance phone calls to the United States and Canada is the Magicjack Go. This product easily connects to your existing home phone and wireless connection.

Magicjack Go has fewer added features than other ATAs, but one stand-out feature is its portability. Weighing only five ounces, its compact design allows you to tuck the Magicjack Go into your suitcase during international travel, so that you can continue to make and receive calls from home for free. Magicjack Go is the perfect choice for frequent travelers who want to stay connected back home. The easy-set up, convenient app and lack of any monthly fees are also nice features.

Best Security: Grandstream GS-HT802

Grandstream GS-HT802 Phone Adapter


The Grandstream GS-HT802 is a smart – and secure — solution for those looking to connect their analog devices to a VoIP network at home or in the office. Built with Grandstream’s industry-leading SIP ATA/gateway technology, the GS-HT802 is equipped with dual FXS ports and a single 10/100Mbps port for fast speeds and a stable connection. And with TLS and SRTP security encryption built in, the Grandstream is set up to protect calls and accounts right from the moment it’s started up.

With three-way voice conferencing also built in, the Grandstream adds enhanced features for an office environment, including support for T.38 faxing for IP as well as a range of caller ID formats to avoid picking up unwanted spam calls. Whereas some VoIP solutions connect to a Wi-Fi network, the Grandstream requires a direct connection via ethernet, which creates a more secure connection and stable calling performance. For long-term security, the Grandstream can be updated over the air to continuously fix security holes or bugs that are detected by the manufacturer. 

Final Verdict

Our top pick for ATAs is easily the Ooma Telo. Which provides a simple way to adapt your landline to VoIP, as well as including smart home compatibility with devices like Nest and Google Home. If the Ooma is unavailable or you're just in the market for something a bit simpler, the Obihai Obi200 is a solid runner-up.

hat to Look for in a Phone Adapter (ATA)

Compatibility - First and foremost, make sure that the phone adapter works with your existing devices. Some higher-end adapters also work with your favorite smart devices, including Nest devices and even Amazon Echo for voice-activated dialing. 

Home vs. business - Will you mainly be using your VoIP phone for personal or business use? This will play a factor in the type of phone adapter you need. If personal use is your main priority, you’ll likely only need one port. However, if you anticipate needing to make several calls or send faxes simultaneously, get an adapter with at least two ports. Other valuable features for a business phone include call forwarding/transfer and voicemail, so double-check that the adapter offers those as well.

Sound quality - Sound quality is one area where a landline still exceeds that of a cell phone. You’ll notice the difference right away, making anything less sound like a call coming from the 1980s.

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