The 7 Best VoIP Adapters

Updated April 28, 2018 by Josh Darling

7 Best VoIP Adapters
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We spent 42 hours on research, videography, and editing, to review the top selections for this wiki. If you're one of the millions of people who are thinking about swapping out their cable and landline phones in favor of the internet, you'll want to check out these VoIP adapters. They'll let you keep on using your existing handset with signals transmitted entirely over the web, and give you lower rates across the board, with free domestic calls. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best voip adapter on Amazon.

7. MagicJack Go

With the MagicJack Go you can enjoy unlimited calls to any number in the United States and Canada, and low international rates beyond those territories. This unit works with your existing handset, and it can forward calls to mobile devices as well.
  • simple voicemail platform
  • ethernet and usb cord included
  • extra cost for 911 service
Brand magicJack
Model K1103
Weight 8 ounces
Rating 4.8 / 5.0

6. Grandstream GS-HT802

The two FXS ports on the Grandstream GS-HT802 support a pair of SIP profiles, so you can share this unit with a colleague or housemate who has vastly different preferences from your own. If the main server loses connection, it will automatically switch to a backup.
  • excellent encryption technology
  • reconnects after a power loss
  • interface is complicated
Brand Grandstream
Model GS-HT802
Weight 11.2 ounces
Rating 4.2 / 5.0

5. Cisco SPA112 2-Port

The Cisco SPA112 2-Port can be connected to an analog phone and a fax machine, so it may be an ideal choice for small, home-based businesses, especially since it also offers call forwarding, voicemail, and distinctive ringtones.
  • features caller id
  • very affordable option
  • troubleshooting not straightforward
Brand Cisco
Model SPA112
Weight 1.1 pounds
Rating 4.3 / 5.0

4. Obihai OBi200

Sold primarily on the basis of its compatibility with Google Voice, the Obihai OBi200 is easy to set up and can be used with virtually any voice over internet protocol service, and, along with all the functions you would expect, also lets you block nuisance callers.
  • free calls in us and canada
  • supports up to 4 services at once
  • can go offline periodically
Brand Obihai
Model OBI200
Weight 9.6 ounces
Rating 4.4 / 5.0

3. Vonage Home Service

While you will be charged a small monthly fee for using it, Vonage Home Service gives you the benefits and accountability associated with a well-known brand. The service is of a high quality, though the annual contract might turn some people off.
  • automatic voicemail transcription
  • able to keep landline number
  • can be linked to 2 smartphones
Brand Vonage
Model HT802-VD
Weight 13.6 ounces
Rating 4.5 / 5.0

2. Ooma Telo

The Ooma Telo promises free phone service with PureVoice HD, which provides an exceptionally clear call quality with next to no lag time. You can hardwire the system to your Ethernet line or connect it with the included Wi-Fi dongle.
  • also runs over bluetooth
  • low international rates
  • intuitive mobile app
Brand ooma
Model Ooma Telo Air (FFP)
Weight 1.6 pounds
Rating 4.5 / 5.0

1. Obi202 2-Port

The Obi202 2-Port allows you to manage its protocols through the company's ObiTalk web portal. You can control endpoints and circles of trust all in one simple interface. It can work with up to four different services, depending on how you configure it.
  • real-time fax over ip
  • usb port for use with add-on devices
  • conference calling capabilities
Brand Obihai
Model OBI202
Weight 11.2 ounces
Rating 4.9 / 5.0

The Importance Of The VoIP Adapter

Many businesses have had enough of the high costs that go with dealing with most phone companies. VoIP service allows for more flexibility and can even be adapted for personal use. If you already have landlines and phone numbers associated with your business, you might wonder how you can switch from a landline to a VoIP service without incurring too many additional costs.

VoIP adapters can transform your average landline into a flexible, convenient VoIP phone and fax service with added benefits. You can make your business calls from your desk phone, an app on your mobile device, or even your computer. Because traditional telephones are not wired for digital signals, you need a VoIP adapter to convert the voice signal to digital.

VoIP adapters allow traditional landline phones to be connected to a VoIP service. You can choose adapters that allow you to connect a landline and fax machine with options such as speed dialing, number storage, and conference calling. Some even come equipped with voice HD and Bluetooth capabilities.

A VoIP adapter often has multiple ports. Most importantly, it will have a port where you can plug in your landline telephone called a Foreign Exchange Station (FXS).

You are going to encounter three basic types of VoIP adapters when shopping, so it’s best to educate yourself on all three:

Single FXS only offers one FXS port in order to connect your landline to your established VoIP service.

Dual FXS adapters are a bit more expensive and offer two FXS ports. These are great for people running small businesses out of their homes or offices who need to connect a phone and a fax machine.

FXS/FXO adapters offer both types of ports to connect both traditional landlines and analog landlines. FXO ports create a more reliable experience and can help you maintain phone service if your Internet or VoIP goes down temporarily.

Not All Adapters Are Created Equal

Now that you have an idea of what it does, you are prepared to determine what features in a VoIP adapter are right for you.

Consider the number of ports. Check out the Ethernet, FXS, and FXO ports provided on the device to determine if it will be a good fit. If you only need one phone line for your business calls and one line for faxes, you only need an Ethernet and one or two FXS ports. However, if your business is larger, you will need to consider additional features.

Consider the cost. High quality VoIP adapters range in cost from $20 to $100. If you need to purchase multiple adapters, then that cost can add up.

Consider your number of lines. How many phone lines do you use to operate your business? This will help you to determine the number of ports you need.

Consider compatibility. Check with your VoIP provider to ensure that the adapter you have chosen is compatible with their services. Some VoIP services provide features that some adapters don’t support, and some adapters provide options that some VoIP services don’t offer. If you purchase an adapter before speaking with your provider, you might sign up for trouble that could be avoided.

VoIP adapters are designed to convert the human voice into data packets. Using an adapter could save you time and money in the long run, especially since you won’t need to buy all new equipment to use the service.

A Brief History Of The VOIP Adapter

There are some who scoff at VoIP saying that it is a useless service due to the number of features available with cell phones. For some consumers, this is a valid argument. For others, especially business owners, it is a crucial part of daily communication.

As many are already aware, Alexander Graham Bell and Elisha Grey invented the first telephone in 1870. Telephone technology quickly advanced from requiring an operator to dial the number to the invention of the touch-tone buttons by AT&T in the mid-1900s.

The Internet was first invented in the mid-1960s by the Advanced Research Projects Agency Network (ARPANET). It was used for private communications between the US Department of Defense and the US Military.

Internet Protocol (IP) was invented in 1972 by by Dr. Vint Cerf. Internet Protocol by definition defines how the information travels and is shared between computers.

VocalTec invented VoIP in 1995 and marketed the first Internet phone. Both users had to purchase and install the same software and then connect a microphone and speakers to their computer in order to speak with one another in real time.

Inventors and consumers alike began to realize that VoIP was more convenient and more affordable than most phone services because it allowed for the transfer of data over the IP. Eventually, the average consumer learned that they could avoid many harsh fees imposed on them by their telephone companies by using VoIP services.

The number of options for VoIP, and subsequently the adapters, are now overwhelming. People want to integrate all devices and communicate with friends and family overseas, and businesses want to ensure that they are offering their customers the best possible service and communication. That is why VoIP services have soared in popularity. They are now an established part of modern communication and don’t appear to be going anywhere any time soon.

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Last updated on April 28, 2018 by Josh Darling

Born in historic Massachusetts, Josh is a freethinking young man with a heart of gold. Noted by many for his wit, grace, and humility, he enjoys reading, history, politics, videogames, baseball, and talking shop.

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