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By WelshPaul
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The OBihai line of VoIP ATA's (Analogue Telephone Adapters) have a very unique feature which allows you to call directly from one OBihai ATA to any other OBihai ATA, for free, with zero configuration. And, this option alone makes the OBihai line of ATA's attractive, from my perspective.

Because I'm doing my initial testing with the OBi100 VoIP ATA, this is the device I'll be primarily referring to throughout this article.

How to Achieve Free World-Wide In-Network VoIP Phone Calling?
All you will need to achieve world-wide free phone calling on the Obihai OBiTalk VoIP network is at least one OBi100 ATA. However, in this case, you will also need to have friends, family, or associates who also have an OBi100 ATA.

When two parties have their own OBi100, it really doesn't matter where around the world they live, they can easily call each other simply by picking up their attached analog telephone and dialing the other party's 9-digit OBihai call number. (Every OBihai ATA comes with its own unique preassigned 9-digit in-network calling number.) In which case, the other party's OBihai device will ring. When the other party picks-up the call, you can now talk for as long as they like.... for free. No time limits, no quota's, no monthly fees.... nada.

I should note that when making calls over the OBiTalk network, you must precede the OBihai device 9-digit number with **9, followed by the 9-digit number to call. Thus, you would dial: **9-xxx-xxx-xxx to make your OBi in-network calls.

Now, I expect that not too many people actually know other people who just happen to have an OBi100 ATA running in their home, or office. But, if you have family, relatives, or even best friends that you want to keep in closer contact with, why not purchase an extra one or two OBi100's and send one to your mother, father, brother, sister, or whoever that other person may be that you want to be able to call, and talk to as often and as long as you like, ...... for free. True enough, there is a one time cost to purchase the OBi100 ATA. But, that's it.... it's only a one time cost. From then on, it's unlimited calling for as long and often as you like.... free.... to and from anywhere in the world, if you have access to a high-speed broadband Internet connection.

But, Aren't There Other VoIP Services That Offer Free In-Network Calling?
Yes, there are. For example, I also use Voipfone and VoipTalk who also provide free in-network calling between accounts.

So, What Makes Obihai different In Terms of Free In-Network Calling?
Well, Obihai sells their own VoIP ATA hardware which comes "pre-configured" from the factory to make calls directly over the OBiTalk VoIP network to other OBiTalk enabled ATA's. Simply put you just plug them in to your internet connection and connect them to the mains and your good to go! That's right, your good to go!

So, for example, if I wanted to take advantage of the Voipfone and VoipTalk free in-network calling features, I would first have to purchase a VoIP ATA, such as the Cisco SPA112, and then manually configure it for service with Voipfone on Line-1, and VoipTalk on Line-2.

But, the Obihai line of ATA's come Plug-and-Play ready for talking over the OBiTalk network. This is a big bonus.

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