6 Best Analog Telephone Adapters for 2019



An analog telephone adapter (ATA) allows businesses to use traditional landline phones with digital voice-over-internet-protocol (VoIP) telephone systems. We looked at a variety of VoIP phone adapters and compared them based on price, features, and warranty to narrow it down to the top six, as well as the best overall option for your business.

Whichever adapter you choose, it’s important that the business phone system that powers it can deliver quality service. If you’re looking for a complete business phone system that works with your existing analog phones and any VoIP adapter, Nextiva is a good choice. Contact the sales team for a free demo today.

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Top 6 Analog Telephone Adapters for 2019

Analog Telephone Adapter Best For
Cisco-SPA112 (Best Overall) Businesses needing an affordable telephone adapter with the best combination of features
Grandstream HT801 Solopreneurs and consultants who want a single-port telephone adapter with the best warranty
Cisco SPA8000-G1 Businesses and call centers that need an adapter that supports multiple phone lines
magicJack GO Workers who desire a portable adapter with VoIP service for traveling or hot-desking
Grandstream HT812 Companies wanting an analog telephone adapter with a built-in router
OBi202 Organizations needing an analog telephone adapter that integrates with Google Voice

How We Evaluated Analog Telephone Adapters

An analog telephone adapter (ATA) should be affordable and easy to set up with existing phones. It should support VoIP technology and provide excellent call quality. The best ATAs also support a variety of call features, including caller ID, call waiting, and call forwarding.

Therefore, we evaluated analog telephone adapters based on:

  • Price: We assessed each analog telephone adapter’s cost compared to the other products on our list.
  • Ease of use: Each adapter was evaluated to determine how easy it is to connect to an analog phone, set up any necessary software, and use.
  • VoIP phone systems: We ensured each adapter was compatible with business VoIP phone systems like RingCentral, Nextiva, Grasshopper, and Vonage.
  • Number of ports: We noted how many standard telephone ports each adapter featured for use with analog phones and additional devices like fax machines.
  • Sound quality: Online reviews were evaluated to ensure each phone adapter offered superior sound quality.
  • Calling features: We looked at the calling features each adapter supported, such as caller ID and call waiting.
  • Additional features: Extra features of each adapter were noted, such as a built-in router or integration with Google Voice.
  • Customer support: We looked at the customer support services each manufacturer offers with their product.

We recommend Cisco-SPA112 as the best overall analog telephone adapter for companies that want to use existing phone equipment rather than invest in new telephones to use with VoIP business phone service. The VoIP-compatible Cisco-SPA112 adapter features two telephone ports and a variety of calling features. This ATA is right for companies wanting a dual-port adapter with the best combination of features at an affordable price.

Best Overall Analog Telephone Adapter for Small Businesses: Cisco-SPA112

Cisco SPA112 - analog telephone adapter

The Cisco-SPA112 is an analog telephone adapter with two standard telephone ports, and retails for a competitive $31. It offers encryption-based security technology and a range of calling features, including call block, transfer, and caller ID, making it right for business owners who want the best combination of phone adapter features at an affordable price.

Cisco-SPA112 Pricing

The Cisco-SPA112 list price at Amazon is around $31, making it one of the least expensive VoIP telephone adapters on our list and on par with other ATAs on the market with similar features. The adapter ships with a power supply, Ethernet cable, quick start guide, and CD with product documentation.

Cisco-SPA112 Features

The Cisco-SPA112 is a two-port VoIP telephone adapter that supports faxing with simultaneous voice calling and data use. It features a web-based configuration dashboard for easy setup and maintenance, along with encryption-based methods to ensure secure communications.

Additional Cisco-SPA112 features include:

Call Features

The Cisco-SPA112 offers standard call features found on most adapters on the market, including caller ID, call blocking, and call transfer. It also includes a variety of features that aren’t included with many ATAs, such as an off-hook warning tone, distinctive ringing, elective and anonymous call rejection, do not disturb, and message waiting indicator tones.

Sound Quality

Cisco has built a number of features into the Cisco-SPA11 analog telephone adapter to ensure superior sound quality, including echo cancellation, full-duplex audio, and voice activity detection. It also offers silence suppression that removes the natural silences that occur in a conversation, so IP bandwidth is used only to transmit speech.

Additional Features

The Cisco-SPA112 features a comfort noise generation that artificially generates background white noise to reassure callers that their calls are still connected during silent periods. This is a particularly useful feature for people who take customer calls at a tech support desk or call center.

Customer Support

The Cisco-SPA112 VoIP phone adapter is backed by a one-year limited hardware warranty with return-to-factory replacement and 90-day limited software warranty. Customer support options include an online ticketing system, downloadable user documentation and manuals, and an online community where users can ask each other for help with resolving issues. Customer service is also available by email and phone.

What Cisco-SPA112 Is Missing

The Cisco SPA112 ATA does not connect analog phones directly to an internet-based VoIP phone system network. Instead, users must connect to a network router via Ethernet cable. Businesses wanting an analog phone adapter with a built-in router should consider the Grandstream HT812.

What Users Think About Cisco-SPA112

Online reviews of the Cisco SPA112 reveal customers are highly satisfied with the phone adapter. Users say the web interface for setting up and adjusting settings is easy to use and cite excellent sound quality. However, some customers note faxing is sometimes unreliable and the quality of live customer support is somewhat lacking.

Where to Find Cisco-SPA112

The Cisco SPA112 analog telephone can be purchased from online retailers like Amazon. To get a look at the physical device before buying, check out traditional stores like Staples or Best Buy. Purchase the Cisco SPA112 by clicking here.

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Best Single Port Analog Telephone Adapter: Grandstream HT801

Grandstream HT801 - analog telephone adapter

The Grandstream HT801 is a VoIP telephone adapter with one standard telephone port that costs around $33 and is similarly priced to other ATAs on our list. It includes echo cancellation, fail over protection, jitter buffer, and robust security technology. This ATA also offers a two-year warranty, making it right for solopreneurs and independent consultants who only need a single-port adapter and want the best warranty to protect it.

Grandstream HT801 Pricing

The Grandstream HT801 retails at Amazon for around $33, which is competitively priced with other single-port ATAs on the market and in the same price range as other adapters on our list. The adapter ships with an Ethernet cable, power adapter, and quick installation guide.

Grandstream HT801 Features

The Grandstream HT801 is a single-port analog telephone adapter with fail over protection that automatically switches to a secondary server if the main server loses connection. It also features security encryption technology to protect calls and an option to configure the device using a built-in voice prompt menu. These features are also available in the Cisco SPA8000-G1 adapter, but for a much higher price because of its number of ports.

Additional Grandstream HT801 include:

Call Features

The Grandstream HT801’s voice features include caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, and do not disturb. This device doesn’t offer quite as many call features as other ATAs on our list, but its core functionality should be enough for most solo business owners and individual users.

Sound Quality

The Grandstream HT801 uses advanced line echo cancellation to prevent reverberating noise. It also features a dynamic jitter buffer to diminish any lags during calls that occur when the packets that contain voice transmissions arrive out of order.

Additional Features

The Grandstream HT801 supports three-way voice conferencing, fax-over-IP, and calling features like call waiting, do not disturb, and call forwarding. It also provides fail over protection to keep communication lines open if the primary server loses its connection.

Customer Support

The Grandstream HT801 comes with a two-year warranty, which is longer than what is offered by many similar products. Customer support options include an extensive knowledge base with user guides and product manuals, downloadable firmware, and a community forum for getting help from other users. Grandstream also offers an online ticketing system as well as phone support through a certified installer or reseller.

What Grandstream HT801 Is Missing

The Grandstream HT801 lacks the ability to upgrade the phone adapter to support more phone lines if your business needs change. However, it does support automated provisioning for volume deployment of multiple devices. Business owners who anticipate needing a multi-port adapter in the future should look at the Cisco SPA8000-G1 ATA instead.

What Users Think About Grandstream HT801

Online reviews of the Grandstream HT801 show a high level of satisfaction with the phone adapter. Customers say they find the device easy to set up and report good sound quality. However, some users find the online documentation to be a bit confusing.

Where to Find Grandstream HT801

The Grandstream HT801 analog telephone adapter is available for purchase through online retailers like Amazon and CDW. For an in-person look at the VoIP phone adapter before buying, check out traditional stores like Staples and CDW. Purchase the Grandstream HT801 by clicking here.

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Best Multi-Port Analog Telephone Adapter: Cisco SPA8000-G1

Cisco SPA8000-G1 - analog telephone adapter

The Cisco SPA8000-G1 is non-portable telephone adapter with eight standard telephone ports and a list price of about $127. It is the costliest adapter on our list, but it also has the most ports. In addition to standard phones, the ports can be used to connect other business devices like fax machines and overhead paging systems. The Cisco SPA8000-G1 is best for call centers and larger offices that want to connect several phone lines or devices to the network.

Cisco SPA8000-G1 Pricing

The Cisco SPA8000-G1 is available at Amazon for around $127, which is approximately the same price as other multi-port ATAs on the market but the most expensive ATA on our list due to its number of ports. The phone adapter ships with a power adapter, an Ethernet cable, and an installation guide.

Cisco SPA8000-G1 Features

The Cisco SPA8000-G1 is an eight-port analog telephone adapter with encryption-based technology to protect calls and tools for large-scale deployment management. It also offers a range of call features including call transfer, call return, and caller ID with blocking.

Additional Cisco SPA8000-G1 features include:

Call Features

The Cisco SPA8000-G1 phone adapter’s call features include selective and anonymous call rejection, call return, do not disturb, and call waiting. It also offers an off-hook warning tone, distinctive ringing, and both tone-based and visual message waiting indicators.

Sound Quality

The Cisco SPA8000-G1 uses advanced implementation of standard voice coding algorithms to provide high-quality voice communication. Like the Grandstream HT801, this phone adapter features a jitter buffer and echo cancellation. It also offers comfort noise generation and voice activity detection with silence suppression, similar to the Cisco-SPA112 ATA.

Additional Features

Like other VoIP adapters on our list, the Cisco SPA8000-G1 supports faxing and three-way conference calling. It also includes tools for large-scale deployment and management so devices can be remotely provisioned.

Customer Support

The Cisco SPA8000-G1 phone adapter comes with a one-year limited hardware warranty with return-to-factory replacement and 90-day limited software warranty. Customer service is also available by email, phone, and via an online ticketing system. The company also runs an online community for users to discuss and troubleshoot device issues.

What Cisco SPA8000-G1 Is Missing

The Cisco SPA8000-G1 isn’t a portable device that can easily be thrown in a travel bag for VoIP calling while working remotely. That would require disassembling the entire phone system setup and stop the remaining analog phones from working. Business owners wanting a portable VoIP phone adapter should take a look at magicJack GO instead.

What Users Think About Cisco SPA8000-G1

Online reviews of the Cisco SPA8000-G1 phone adapter are overall positive. Customers say it only takes a few minutes to set up the device and that it’s a good value for the money. However, some users say they are disappointed by the quality of the customer support department.

Where to Find Cisco SPA8000-G1

The Cisco SPA8000-G1 analog telephone adapter is available for purchase through online retailers like CDW and Amazon. To see the adapter before you buy, visit an office supply store like Staples or Office Depot. Purchase the Cisco SPA8000-G1 by clicking here.

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Best Portable VoIP Phone Adapter With Telephone Service: magicJack GO

MagicJack - analog telephone adapter

The magicJack GO is a VoIP telephone adapter with VoIP phone service that plugs into a computer’s USB port. Users then plug any analog phone into the device’s standard phone jack to make calls over the internet. Similarly priced to other ATAs on our list, it costs about $35 and includes phone service with free domestic calling. The magicJack GO’s small size and portability make it right for workers who travel and office environments with hot-desking.

magicJack GO Pricing

The magicJack GO is available from the manufacturer’s website for $35 and at Amazon for approximately $30, which is in line with the cost of the other single-port phone adapters on our list. The ATA comes ready to use with a power adapter, Ethernet cord, USB extension cord, and step-by-step instructions.

magicJack GO Features

MagicJack GO is a single-port VoIP phone adapter that connects an analog phone to a computer to make calls over the internet. It includes built-in VoIP phone service features as well as unlimited local and long distance calling to the U.S., Canada, Puerto Rico, the U.S. Virgin Islands, and to other magicJack devices.

Additional magicJack GO features include:

Call Features

MagicJack GO’s call features include caller ID, call forwarding, call waiting, and voicemail. Unlike the Grandstream HT812 and HT801 that limit conference call participants, this ATA offers unlimited conference calling with an unlimited number of participants. Users can make or receive calls on their smartphone by downloading the companion mobile app, and allow their home, business, and mobile devices to ring simultaneously so they never miss a call.

Sound Quality

Unlike other analog phone adapters on our list, the magicJack GO doesn’t have admin tools that allow users to tweak device settings for maximum sound quality. However, online customer reviews of the phone adapter praise the magicJack GO’s sound quality and compare it to what you get with a standard landline or larger VoIP business phone system.

Additional Features

magicJack Go features free unlimited domestic calling and long-distance calling to Canada, Puerto Rico, the U.S. Virgin Islands, and to other magicJack devices. Outbound calls to other international destinations are available at a per-minute charge. However, it’s important to note that unlimited calling is only free for the first year of service. After that, customers will be required to renew their service plan for $39 per year or $89 for three years.

Customer Support

magicJack GO is warrantied against component defects for one year after purchase. The company offers an extensive online knowledge base with guides for everything from setting up service to how to use its features. magicJack also offers premium, unlimited phone-based customer support and discounted device replacement costs for $14.99 for one year or $29.99 for three years.

What magicJack GO Is Missing

MagicJack GO includes its own phone service and doesn’t work with other VoIP business phone services. Organizations that want the freedom to use a different VoIP service should consider the single-port Grandstream HT801 instead.

What Users Think About magicJack GO

Online user reviews of magicJack GO are overall positive. Customers emphasize its sound quality, portability, and ease of use. However, some customers are frustrated by the high price of phone support, and there are some reports of dropped calls, an important consideration when purchasing a product to support business communication.

Where to Find magicJack GO

The magicJack GO analog telephone adapter can be purchased from online retailers like Amazon and Newegg. To get a look at the physical adapter before buying, head to a brick-and-mortar store like Staples or Best Buy. Purchase the magicJack GO by clicking here.

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Best Analog Telephone Adapter With a Built-In Router: Grandstream HT812

Grandstream HT812 - analog telephone adapter

The Grandstream HT812 is an analog telephone adapter with two standard phone ports and a built-in router for connecting your phones to the internet. Priced a bit higher than other ATAs on our list, it costs around $40 but comes with a robust two-year warranty. The Grandstream HT812 is best for businesses that want efficient dual-purpose equipment to handle both connecting phones and routing them to the internet, as well as the best warranty.

Grandstream HT812 Pricing

The Grandstream HT812’s list price at Amazon is about $40. That’s on par with other phone adapters with built-in routers and only a few dollars more than the two-port Cisco-SPA112 that doesn’t include a router. The phone adapter ships with an Ethernet cable, power adapter, and quick installation guide.

Grandstream HT812 Features

The Grandstream HT812 is a two-port analog telephone adapter with a built-in router that acts as a conduit for connecting phones and the adapter directly to the internet. It also supports faxing, caller ID, call transfer, and three-way conference calling.

Additional Grandstream HT812 features include:

Call Features

The Grandstream HT812’s call features include blind or attended transfer, forward, hold, do not disturb, caller ID display or block, and call waiting. Like the Grandstream HT801, this phone adapter also offers security encryption technology to protect calls and communication.

Sound Quality

Like the other VoIP phone adapters on our list, the Grandstream HT812 uses advanced line echo cancellation to prevent unintentional repeating noise. It also features dynamic jitter buffer to smooth out noticeable audio glitches during calls that happen when the transmission line becomes temporarily unstable.

Additional Features

The Grandstream HT812 offers three-way conference calling, faxing, caller ID, and fail over protection to keep communication lines open if the main server loses its connection. It also has automated provisioning for volume deployment and device management. It is the only ATA on our list that has a built-in router which can handle routing speeds up to 100MBps.

Customer Support

The Grandstream HT812 comes with an attractive two-year warranty to protect your equipment. Customer support options include downloadable user guides, product manuals, firmware, an extensive knowledge base, and a community forum. Grandstream also offers an online ticketing system as well as phone support through a certified installer or reseller.

What Grandstream HT812 Is Missing

The Grandstream HT812 doesn’t support integration with Google Voice, a VoIP service some business owners use for free or low-cost domestic and international calling. Google Voice customers wanting an analog phone adapter with Google Voice integration should consider the OBi202 instead.

What Users Think About Grandstream HT812

Online customer reviews of the Grandstream HT812 are positive overall. Customers are impressed with the myriad configuration options and the convenience of setup and maintenance via an intuitive browser-based admin dashboard. However, some customers say the product documentation could be more user-friendly.

Where to Find Grandstream HT812

The Grandstream HT812 analog telephone adapter can be purchased from the manufacturer or at online retailers like Amazon. To see the ATA in person, check out traditional stores like OfficeMax or Staples. Purchase the Grandstream HT812 by clicking here.

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Best VoIP Phone Adapter With Google Voice Integration: OBi202

OBi202 2-Port VoIP Phone Adapter - analog telephone adapter

The OBi202 is an analog telephone adapter with two standard phone ports; it works with any VoIP phone service, but includes built-in support to connect to Google Voice for free or low-cost calling. At $58, this mid-range priced ATA features faxing, caller ID, and call waiting. The OBi202 is best for businesses that use Google Voice for free domestic and low-cost international calling.

OBi202 Pricing

The OBi202 retails at Amazon for around $58. That’s a bit more expensive than other two-port routers on the market, but some companies may find its integration with Google Voice is worth the extra money. The phone adapter ships with a power supply, Ethernet cable, and installation manual.

OBi202 Features

The OBi202 is a two-port VoIP telephone adapter with native Google Voice integration. It features a mobile app, faxing, and call features like conference calling, anonymous calling, call transfer, and more.

Additional OBi202 features include:

Call Features

The OBi202 phone adapter offers a range of call features including caller ID, block by caller ID, call waiting, do not disturb, anonymous calling, and call transfer. Call forwarding works on all calls, busy calls, and forward on no answer. The ATA also includes conference calling and both visual and tone-based message waiting indicators.

Sound Quality

The OBi202 uses technology designed so voice conversations are prioritized on the network ahead of all other traffic. Online reviews of this VoIP telephone adapter reveal high customer satisfaction with sound quality, and few reports of noise variances like lagging or echoing.

Additional Features

The OBi202 ATA includes native support for Google Voice VoIP phone service for making free calls in the U.S. and Canada as well as international calls for a low per-minute rate. Users can also receive calls at their Google Voice number and check voicemail messages on analog phones attached to the adapter.

Customer Support

The OBi202 analog phone adapter comes with a one-year warranty. Customer support options include an online knowledge base, including user manuals and other product documentation, an online ticketing system for contacting tech support, and a community forum where users can ask each other questions.

What OBi202 Is Missing

The OBi202 ATA doesn’t advertise the same level of call encryption as other devices on our list. Therefore, doctors’ offices, legal firms, and other businesses that make and receive sensitive calls should consider the two-port Cisco-SPA112 analog phone adapter instead.

What Users Think About OBi202

Online customer reviews of the OBi202 VoIP phone adapter are favorable overall. Customers say the device is a good value for the money, with great sound quality and easy setup. However, some users say the product documentation could be beefed up with better troubleshooting information.

Where to Find OBi202

The OBi202 analog telephone adapter can be purchased from online retailers like Amazon and New Egg. To get a look at the ATA before buying, check out traditional stores like Staples or OfficeMax. Purchase the OBi202 by clicking here.

Learn More

Bottom Line

Businesses and entrepreneurs that want an analog telephone adapter with the best combination of features at an affordable price should consider the Cisco-SPA112 adapter. It offers great sound quality, encryption-based security technology, and a variety of calling features, including caller ID, call transfer, and do not disturb, making it the best VoIP telephone adapter for most businesses.

No matter what phone adapter you choose for your analog phones, make sure you are using it with a reliable VoIP business phone system. Nextiva is an excellent option as it includes robust features in addition to affordable pricing tiers that can scale with you as your business grows. Try it free today.

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