VoIP Phone Adapter (ATA) Comparison and User Manuals

Phone Adaptor Overview

Assuming high speed internet already exists, a VoIP phone adapter or ATA (Analog Telephone Adapter) is the only additional item of equipment that is required to enable VoIP service in your home or small business with your existing analog telephones. This adapter is required to convert analog phone signals into digital signals (IP packets) and allows your phone calls to use VoIP and be transmitted and received over the Internet. An ATA is however not required if you decide to use IP enabled telephones as these phones already transmit and receive digital packets, and can be directly connected to your network via an Ethernet cable. For the purposes of this discussion, we will assume that you want to use regular analog phones. This includes DECT devices as although DECT stands for Digital Enhanced Cordless Telecommunications, they still use analog signals for phone calls.

VoIP Adapters

Selecting the Right Adapter

As mentioned above, a phone adapter is a simple device that converts your analog telephone signals (your voice) into a digital format to send over the Internet. It also does the opposite in the receive direction, that is to convert a digital formatted incoming voice call into an analog stream to send to your existing analog phone. The following features should be considered during selection. Use this information in combination with our comparison table below to select the right device for your needs:

Free Lease Option

When signing up for a VoIP phone service, it is easy to select what is typically a free phone adapter lease option, and let the provider send you one of their choosing. This can be a great option but there are some things to consider:

If you review our troubleshooting section, you will see that the majority of problems that people run into are related to either call quality or setup and configuration. So if you do select the free lease option, the bottom line is that you need to pay attention to which model you are going to receive from the provider.

Please use our comments box at the end of this page to let us know your experiences with any of these models and also let us know if you would like to see additional ones added to this list.

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VoIP Phone Adapter Comparison Tables

Below you will find comparison tables broken into manufacturer groupings.

NOTE: View this page on a desktop or laptop device for the complete comparison table.

Cisco/Linksys/Sipura ATA's

Model Image Price * Available ** 10 Mbps 10/100 Mbps FXS Ports FXO Ports Router QoS WiFi Manuals
SPA112 $45.00 YES 0 1 2 0 NO 802.1p NO SPA112
SPA122 $70.00 YES 0 2 2 0 YES 802.1p Diffserv ToS NO SPA122
PAP2T $69.00 NO 0 1 2 0 NO Diffserv ToS NO PAP2T
SPA2102 $75.00 NO 0 2 2 0 YES Diffserv ToS NO SPA2102
SPA3102 $70.00 YES 0 1 1 1 YES Diffserv ToS NO SPA3102
SPA8000 $210.00 YES 0 1 8 0 NO 802.1p Diffserv ToS NO SPA8000
SPA8800 $425.00 YES 0 1 4 4 NO 802.1p Diffserv ToS NO SPA8800
RT31P2 $55.00 YES 0 4 2 0 YES YES NO RT31P2
RTP300 $50.00 NO 0 5 2 0 YES YES NO RTP300
WRT54GP2 N/A NO 0 4 2 0 YES YES 802.11b/g WRT54GP2
WRT54GP2A N/A NO 0 5 2 0 YES YES 802.11b/g WRT54GP2A
WRP400 $95.00 YES 0 4 2 0 YES 802.1p Diffserv ToS 802.11b/g WRP400
SPA1000 N/A NO 1 0 1 0 NO NO NO SPA1000
SPA1001 N/A NO 1 0 2 0 NO NO NO SPA1001
SPA2000 N/A NO 1 0 2 0 NO NO NO SPA2000
SPA2002 N/A NO 1 0 2 0 NO Diffserv ToS NO SPA2002
SPA2100 N/A NO 2 0 2 0 NO 802.1p Diffserv ToS NO SPA2100
SPA3000 N/A NO 1 0 1 1 NO Diffserv ToS NO SPA3000
PAP2v1/v2 N/A NO 0 1 2 0 NO NO NO PAP2v1/v2

* The pricing listed above is estimated based on price listing on ecommerce sites offering these products.

** An ATA marked with an X in the "still for sale" column above has a manufacturer End of Life (EOL) notice and is also likely End Of Support (EOS)

Grandstream ATA's

Model Image Price * Available ** 10 Mbps 10/100 Mbps FXS Ports FXO Ports Router QoS WiFi Manuals
HT502 $45.00 YES 0 2 2 0 YES 802.1p/q Diffserv ToS NO HT502
HT503 $60.00 YES 0 2 1 1 YES 802.1p/q Diffserv ToS NO HT503
HT701 $35.00 YES 0 1 1 0 NO 802.1p/q Diffserv ToS NO HT701
HT702 $40.00 YES 0 1 2 0 NO 802.1p/q Diffserv ToS NO HT702
HT704 $100.00 YES 0 1 4 0 NO 802.1p/q Diffserv ToS NO HT704
GXW4004 $100.00 YES 0 2 4 0 YES 802.1p/q Diffserv ToS NO GXW4004
GXW4008 $167.00 YES 0 2 8 0 YES 802.1p/q Diffserv ToS NO GXW4008
HT286 N/A NO 1 0 1 0 NO 802.1p/q Diffserv ToS NO HT286
HT386 N/A NO 1 0 2 0 NO 802.1p/q Diffserv ToS NO HT386
HT486 N/A NO 2 0 1 0 YES 802.1p/q Diffserv ToS NO HT486
HT496 N/A NO 2 0 2 0 YES 802.1p/q Diffserv ToS NO HT496

* The pricing listed above is estimated based on price listing on ecommerce sites offering these products.

** An ATA marked with an X in the "still for sale" column above has a manufacturer End of Life (EOL) notice and is also likely End Of Support (EOS)

Obihai ATA's

Model Image Price * Available ** 10 Mbps 10/100 Mbps FXS Ports FXO Ports Router QoS WiFi Manuals
OBi100 $39.99 YES 0 1 1 0 NO 802.1p Diffserv ToS NO OBi User Manual
OBi110 $49.99 YES 0 1 1 1 NO 802.1p Diffserv ToS NO OBi User Manual
OBi200 $59.99 YES 0 1 1 0 NO 802.1p Diffserv ToS With OBiWiFi on USB port OBi User Manual
OBi202 $74.99 YES 0 2 2 0 YES 802.1p Diffserv ToS With OBiWiFi on USB port OBi User Manual

* The pricing listed above is estimated based on price listing on ecommerce sites offering these products.

** An ATA marked with an X in the "still for sale" column above has a manufacturer End of Life (EOL) notice and is also likely End Of Support (EOS)

Phone Adapter Firmware

If you need to upgrade the firmware in your phone adapter, please use the following information to direct you to the correct manufacturers firmware section:

Manufacturer Firmware Location
Cisco Cisco Firmware Revisions
Linksys Linksys Firmware Revisions
Grandstream Grandstream Firmware Revisions
OBi OBi Firmware Revisions

Service Provider ATA Information

As mentioned, there are some hidden costs related to free lease ATA's that everyone should be aware of before choosing that option.

Provider Free Lease S&H Fee Replace Fee Options Models
YES $12.95 N/A N/A More Details
YES $0.00 $49.95 Linksys (PAP2T, RT31P2 Grandstream (HT502, HT701) More Details
YES N/A N/A OBi More Details
YES $14.95 $99.90 Linksys (SPA942, SPA2102, SPA112, SPA122, SPA8000 Grandstream (HT502, HT286) More Details
YES $14.95 $39.99 N/A More Details

The details in the above tables were taken from a combination of manufacturer and provider websites.

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Author: Anthony

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WhichVoIP Visitor Comments

#3 : Posted by Sue on August 1st, 2016:

My internet provider will not allow me to purchase a wired modem with both an ethernet port and a LAN port (or USB or telephone port). I do not prefer wifi. How can I connect an ATA to a modem with only one Ethernet port?

-> Response: You need an Ethernet switch. You would then connect your Internet provider's box to the switch and then have multiple wired ports on the switch that you could connect the ATA (and other devices) to.

 

#2 : Posted by Asif Ul Alam on March 13th, 2016:

Can you please tell me which ATA converter supports the SCCP protocol?

-> Response: There are very few ATAs that seem to support SCCP. If you really must use SCCP, try the Cisco ATA186 or 188. They can be configured to support SCCP but are expensive. However you may be able to pick a used one up on Amazon for around $40.

 

#1 : Posted by Steve on May 6th, 2015:

I used the Cisco SPA112 and it saved me so much money. I had an analog phone so I thought I would not be able to use it anymore by transferring to VoIP, but this little ATA saved everything.

 

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