Obihai and Google Voice for Free Calls in 2018

Obihai is a VoIP company from California that designs and manufactures Analog Telephone Adapters (ATA). These devices turn a regular landline phone into a VoIP phone, and when connected to a VoIP provider, cheap phone calls can be achieved.

To take this one step further, when the Obihai ATA is connected to Google Voice, you can make and receive calls inside the US and Canada free of charge.

Intrigued? If so, read the following article and by the end of it you will be ready to say your goodbyes to all phone bills.

Obihai and Google Voice

Obihai ATAs and How it Works

Obihai makes Analog Telephone Adapters (ATA). An ATA is a device that takes your existing analog telephone and converts your voice to a digital format and sends it over your Internet connection (Cable, DSL, FiOS etc). This technology is referred to as Voice over IP, or simply VoIP, and because the calls are sent over the internet, it is much cheaper than traditional phone service. Figure 1 below shows a typical setup for your home, using the OBi200 as an example.

Obihai ATA

Figure 1: Obihai Home Setup

The actual device is very small, less than 3 inches on each side, and has only 4 connections: power, internet, phone and USB, as seen in Figure 2.

Obihai ports

Figure 2: Obihai Connections

Google Voice

Now to Google voice, why is this required I hear you ask. Well, the Obihai ATA simply provides the hardware and software to make phone calls using your existing telephone, it does not handle the actual routing of phone calls to the PSTN, cell phones or indeed other VoIP lines. For this we need a VoIP service provider.

The Obihai ATA can actually be used with most VoIP service providers, such as the ones you see in the table on the right hand side. These providers each offer low cost phone service with a rich feature set. Google Voice, however, is completely free and enables free phone calls inside the US and Canada along with low cost International calls. It was created by Google as a softphone to allow Google users to make free calls from a computer. Obihai was smart enough to realize that there were other ways to take advantage of this technology and allow users to make calls using traditional analog telephones.

Obihai with Google Voice - What's the Catch?

There really isn't a catch. Sure, you have to buy the Obi ATA device, which costs upwards of $40 for the base model. This is a one time fee, and Google Voice is completely free for calls inside the US and Canada.

However, a few things to realize before you jump in:

  1. There is no official support from Google for this service. Google could tear this service at any time. In fact they nearly did before but decided to keep it going as part of its Google hangouts service.
  2. The feature set is very limited compared to the providers you see on the right hand side.
  3. Support wise, you are on your own. Hopefully this guide will help here though.
  4. Be careful with telephone numbers. If you are looking for a new number with a specific area code you may be out of luck, as there is not a huge selection to choose from. If you wish to port a number into google voice, at the present time this can only be performed with mobile phone numbers and be aware that currently there is a fee of $20 associated with this. You cannot port a landline number into google voice. If you need to port your Google voice number out of google it will cost you $3, at this time of writing.
  5. E911 calling. Google Voice does not support E911 emergency service calling. However, Obihai has a way around this, where you can partner with Anveo, for E911 service. There is a small fee associated with this, currently $15 per year.

Setting up Obihai and Google Voice

The setup for the OBi and Google Voice is not too difficult but there are a few steps that must be followed. First the hardware setup, Figure 3 shows my setup for the OBi200 device I used for this exercise. The only connections required were power to the OBi200, the phone line connection from the analog phone and the Ethernet cable that goes to my Internet router. No connection is needed for the USB, though this can be useful if you require WiFi (separate OBiWiFi adapter required).

Obi Voice Setup

Figure 3: OBi Voice Setup

Create a Google Voice Account

You will need a Google voice account. To get this you need a Google account (e.g. Gmail) before signing up for a Google voice account and phone number. Navigate to Google voice at and sign-in and follow the process to get a new phone number. A few verification steps will be required before you are given a new phone number.

Create an OBiTalk Account

Now that Google voice is configured, it is time to sign up for OBiTalk. Register for an account and sign in with Google as it is easier, especially if you have already logged in to Google on your Internet browser.

Add your Device to OBiTalk

After creating an OBiTalk account and then signing in to OBiTalk, it is time to Add a Device. Usually this is the first thing that will appear when you sign in for the first time. You will be presented with some information on how to add a device, as highlighted in Figure 4 below.

OBiTalk Add Device

Figure 4: Add a Device in OBiTalk

Remember to check the box for configuring Google voice for this device and click on Next. The setup will then give you instructions for the phone, as shown in Figure 5 below. This step is needed to connect the OBi device to the OBiTalk server. Note that the number you see in Figure 5 varies so follow the directions given for your own setup.

Connect to OBiTalk Server

Figure 5: Connect to OBiTalk Server

I had some issues on this step and the OBi device would not connect successfully. I made the phone call and got the automated response but I got an error in OBiTalk. The problem turned out to be the ports that were configured in my router. Certain ports need to be forwarded in your router to the OBi device in order for a successful connection between the device and the Obihai servers. For more details on this, see our OBi200 Review page (Figures 3 and 4 on that page). Once I forwarded the ports in my router, I successfully connected my OBi device to the OBiTalk servers. Review the Emergency Services dialog box and then the Google Voice terms and conditions and then click on the "Finish Setup" button.

Google Voice Configuration

You may need to sign in again to Google Voice with your email and password, from inside OBiTalk, and once you hit the final "Accept" button it will finalize the Google Voice setup. This can take up to 2 minutes, and will look like Figure 6 below while it is configuring. When it is done it will show "Connected" as the status.

Final Google Voice Configuration

Figure 6: Final Google Voice Configuration (inside OBiTalk)

The OBi dashboard will now look like Figure 7, indicating that the OBi device is connected to the Obihai servers.

OBi Dashboard

Figure 7: OBi Dashboard

You are Now Ready to Make FREE Phone calls

You should be able to make and receive phone calls on your telephone now, and the best part is, they are all FREE!

Google voice will work with any of the Obihai devices. Want to buy an OBi adapter? Amazon has great deals, see special deals below.

OBi100 OBi110
Obihai OBi100 Obihai OBi110
Buy Now Buy Now
OBi200 OBi202
Obihai OBi200 Obihai OBi202
Buy Now Buy Now

Please add a comment at the bottom of this page if you found this useful or need help setting this up for free calls.

Related Articles for Further Reading:

left arrow PREV
Local Number Portability
NEXT right arrow
Cheap International Calling Options for 2017


Ask us your question or add a comment:

Use the form below to add your comments/thoughts and to interact with us. All comments will be moderated by before going live. We try to answer all questions within 24 hours.

Email: (ONLY used for responding)
Enter code below:

By submitting you agree to our site Terms of Use


WhichVoIP Visitor Comments

#8 : Posted by Jim

I have Google Home. Can Google Home interact with Google Voice for any additional benefits? Can I port over my phone number to Google Voice?

-> Response: Indeed it can. In fact in many ways it works better than Amazon Alexa as it allows you to call anyone that is in your Google contacts list.
Yes you can port your number over to Google voice, the cost is $20 at this current time. However there are restrictions on the type of numbers than can be ported. For example, cell phone numbers are fine but may be issues with landline numbers. See this url on the subject of google voice and porting numbers.


#7 : Posted by J Hartis

I have an Obi100 from years ago, is it still usable? I have read elsewhere that it would not be after May 2017 (End of Life). I am having difficulty getting set up and wondering if it is that explanation or just errors I am making.

-> Response: It is indeed EOL. Have you verified that you have the latest firmware on there?
I would expect this device to still work in all honesty so it may either need a firmware update to the latest before it went EOL or perhaps you have an incorrect setting for your phone service.


#6 : Posted by Frank

What is the cost per month for Obitalk? I live out in the country and have had Magic Jack for years. Service was choppy most of the time so I have chosen not to renew. Is Obitalk any better?

-> Response: It may save you some money if you use the Obi adapter with Google voice but this assumes you can get a phone number from Google voice that works for you (few available now). However, if you had issues with MJ it may be due to your Internet in your location, in which case I'm not sure the Obi will help much to be honest. It may be worth running our VoIP test first.


#5 : Posted by Ron

I have a Netgear router and I do not see anywhere about setting up the ports. So I tried removing the firewall and I still can not receive calls. The tech people at OBI keep referring back to the old version of Google Voice which does not apply to the current Google Voice. This what they suggest:
1. Sign in to your Google Voice account
2. Go to "Settings" located on the top right (cog wheel)
3. On the Phone tab, you will see a "Delete" option under Google Chat
4. Click "Delete" Google Chat
I see other people having the same problem since Google changed the setup for Google Voice.

-> Response: When I login to Google voice I can access settings by clicking on the 3 vertical dots on the left hand side and then clicking on settings. I still do not see Google chat option though.
I would break the problem down and first try and get google voice to work from a PC (i.e. login to google voice and make a call) as that will prove that your router setup is working fine.
Which Netgear router do you have?


#4 : Posted by Earl

The problem begins with what I just found out about the ObiHai. Obi 100. Activated in Jan of 2015. As soon as support ended, your ability to USE GV ended. You have to pay up to continue to use it. So much for pay once.


#3 : Posted by Olek

Hi, I am in Canada, I've set up Obi200 and can make a call through Google Voice, but I don't receive incoming calls. How do I set up incoming calls?

-> Response: It is likely an issue on your router/firewall. You need to forward ports to get past firewall related issues. More of this can be found on our Obihai review page.


#2 : Posted by Dave

Live in the boonies so DSL speed is capped at 1.5mbs down & 0.250mbs up. Is that sufficient for good communication on the OBi202 ? Thanks

-> Response: I am a little worried about the uplink speed. Technically you only need about 100Kb/s or less for VoIP and you have 250Kb/s so it is possible but you could see some issues if also doing other things on the Internet at the same time.
Have you run our VoIP test yet? I would recommend running it.


#1 : Posted by Jack Sarig

Any fee for services, besides purchasing the device? What is the cost for porting my tel number

-> Response: No monthly or yearly fee and calls inside the US/CAN are free (calling outside US/CAN there are charges from 1c/min).
There is a $20 fee to port your number to Google, at this time of writing.


Top VoIP Providers

Provider* $/mo Details
  • SHARE: