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OBi100 VoIP Telephone Adapter and Voice Service Bridge

4.3 out of 5 stars 2,602 customer reviews
| 327 answered questions

List Price: $59.99
Price: $46.92 & FREE Shipping on orders over $49. Details
You Save: $13.07 (22%)
Only 1 left in stock.
Ships from and sold by Amazon.com. Gift-wrap available.
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  • Enter your model number to make sure this fits.
  • Works with Google Voice
  • Easy to Set-Up Using OBiTALK.com
  • Also Supports SIP Bring Your Own Device Services like Anveo Callcentric, Voip.ms, etc.
  • Calling Features: Call Waiting, 3-Way Calling, Call Forward, Caller ID, Telemarketer and Anonymous Caller Blocking
  • OBiTALK Portal Features: Manage Your OBi, Connect to Your Friends' OBi Devices, Add Services, Download Apps for PC, Speed Dial Up to 99 OBi Endpoints or Phone Numbers
3 new from $46.92 3 used from $99.00
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$46.92 & FREE Shipping on orders over $49. Details Only 1 left in stock. Ships from and sold by Amazon.com. Gift-wrap available.

Product Description

Product Description

Free Calling with Your Home Phone

Use your existing home phone and your broadband router to make and receive calls over the Internet for free (or at a very low-cost).

Why You Will Love the OBi

  • Save Money
    Use the free OBiTALK and low-cost VoIP services to lower your phone bills.
  • The OBi is Not Locked to a Particular Service
    Add VoIP services of your choosing, to make & receive phone calls to and from regular phone numbers.
    In addition, OBi to OBi calls are free.
  • Computer Not Required
    All you need is your existing home phone and broadband router.
  • Fantastic Voice Clarity
    Talk with your family and friends anywhere in the world, from the comfort of your home telephone.
OBi100 Set-Up
OBi100 Set-Up

How Does the OBi Work?

The OBi allows you to make and receive phone calls using your high-speed internet, your regular home phone, and low-cost residential and business "VoIP" Internet phone service providers like; Anveo, Callcentric, Localphone and VoIP.ms. No computer is needed. You can also call for free from one OBi to another OBi anywhere in the world. In this case, a traditional phone service is never needed to make the connections.

OBi100 Connections
OBi100 Connections


  1. Broadband Internet Connection
  2. Internet Router with Available Ethernet Port
  3. Analog/Digital Corded or Cordless Phone
  4. VoIP Service Provider Account Username & Password (Optional But Highly Recommended): Anveo, Callcentric, Localphone, VoIP.ms, and many more.


  • Use the OBi with Low Cost Internet Phone Services
  • Unlocked — Use VoIP Service Providers of Your Choice with Bring Your Own Device Plans
  • Get the Lowest Cost International Calls with Service Providers of Your Choice
  • Premium Features — Voice Mail, Caller ID, Call Forwarding, Call Waiting, 3-Way Calling
  • Free OBi to OBi Calls Anywhere in the World
  • No Computer Required to Make/Receive Calls
  • OBi Callback — Make Calls at Receiving Rate
  • Fantastic Call Quality
  • Use free OBiON Apps with Your Smart Phone or Tablet

Easy Set-Up

  1. Connect the OBi Device to Your Internet Router
  2. Connect Your Home Phone to the OBi
  3. Sign-on to www.OBiTALK.com
  4. Set-Up a Voice Service from a List of Partner Providers or Add Any SIP VoIP Service to Your OBi Device

Additional Benefits

  • Expert Technical Support via Email, OBiTALK Community Forum
  • Free Software Updates & Enhancements
OBi100 VoIP Phone Adapter


OBi Device Telephony Features:
  • Message Waiting Indication - Visual and Tone Based
  • Speed Dialing of 99 OBi Endpoints or Numbers
  • Three-Party Conference Calling with Local Mixing
  • Hook Flash Event Signaling
  • Caller ID - Number
  • Caller ID - Name
  • Call Waiting
  • Call Forward - Unconditional
  • Call Forward on Busy
  • Call Forward on No Answer
  • Do Not Disturb
  • Call Return
  • Call Recording (From Device Web UI)
  • Call History (Last 200 Calls from Device Web UI)
  • Aggregation and Bridging of Two (2) SIP and One (1) OBiTALK Services
  • Automatic Attendant (AA) for Simplified Call Routing
  • Call Back Service - Connect to AA to Make a New Call or Ring the Attached Phone
OBiTALK Web Portal Integration:
  • Configuration and Management of OBi Endpoints
  • Addition & Configuration of VoIP Service Providers - Including 7-Digit Dialing
  • Download OBiON Apps for Smart Phones, Internet Tablet Devices & PCs
  • Creating & Joining Circles of Trust So You Can Share Your OBi's Services with Friends & Family
  • Setting Up Your OBi Endpoint Speed Dial Directory

Which OBi Should I Get?

Obihai has four telephone adapters, currently - The OBi100, OBi110, OBi200 and OBi202. See the chart below for an overview of the product features. In essence, these products work with your phone in the same manner except for one key feature. The OBi110 has a physical port for an analog line service. This port, labeled LINE on the OBi110, can be thought of as a gateway to a traditional phone service. The service can be from a land line carrier. It can also be from a VoIP service, when the phone port of the service provider's device is plugged into the LINE port of the OBi110.

OBi VoIP Adapter Selection Matrix
Model Number

OBiTALK Web Portal Set-up & OBi-to-OBi Calling Yes
Phone Port(s) 1 1 2 1
Line Port VoIP Gateway 0 0 0 1
VoIP Services Supported 2 4 4 2
2-Port Internet Router with Voice Packet Prioritization No No Yes No
USB 2.0 Port for OBiWiFi and OBiBT and OBiLINE No Yes Yes No
T.38 Fax No Yes Yes No
Power Adapter 100-240 Volt Switching Power Adapter
The OBi200, OBi202, OBi100 & OBi110 All Have:
  • Phone Port(s): For connection to an analog cordless or corded phone(s) - The OBi202 has two phone ports.
  • The OBi Phone Port(s) Can Power All the Phones in Your Home
  • One Ethernet Port: For connection to an Internet router
  • The OBi202 has a second Ethernet port to connect to a PC or an Ethernet switch.
  • Support for Commercial VoIP services (OBi200 and OBi202 can support up to 4 VoIP Services)
  • Support for SIP
  • Support for OBiTALK free OBi-to-OBi Calling
  • Message Waiting Indication - Visual and Tone Based
  • Speed Dialing of 99 OBi Endpoints or Numbers
  • Three Way Conference Calling with Local Mixing
  • Hook Flash Event Signaling
  • Caller ID - Name & Number
  • Call Waiting
  • Call Forward - Unconditional
  • Call Forward on Busy
  • Call Forward on No Answer
  • Call Transfer
  • Anonymous Call
  • Block Anonymous Call
  • Do Not Disturb
  • Call Return
  • Repeat Dialing
  • OBiTALK Managed VoIP Network for OBi Endpoint Devices & Applications
  • High Quality Voice Encoding Using G.711, G.726, G.729 Algorithms (iLBC in OBi200, OBi202)

Note: Some listed features are not available from every service provider.

From the Manufacturer

The OBi100 has one phone port. It supports, SIP & OBiTALK VoIP services. Use the OBi100 when you do not need an analog line to a traditional telephone network or service. The OBi100 is perfect for customers who do not have a traditional telco phone service and want the savings and simplicity of using a VoIP service for all their calls.

Product Information

Technical Details

Brand Name Obihai
Item Weight 4.8 ounces
Product Dimensions 3.5 x 0.9 x 2.6 inches
Item model number OBI100
Color White / Gray
Manufacturer Part Number OBI100

Technical Specification

Warranty [pdf ]

Additional Information

Customer Reviews
4.3 out of 5 stars 2,602 customer reviews

4.3 out of 5 stars
Best Sellers Rank #31,071 in Office Products (See top 100)
#22 in Office Products > Office Electronics > Telephones & Accessories > VoIP > Adapters
Shipping Weight 4.8 ounces (View shipping rates and policies)
Date First Available March 24, 2011

Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF ]


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Technical Details

  • One-year (limited) manufacturer's hardware warranty.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
Update: As of 7/22/16 it was a good run while it lasted. Picked up my phone to make a call today and every time I attempted to use my dial it says your phone is not properly configured; when I know its properly configured. So I log into the website to see what the issue was and the site says greetings your phone phone is not properly configured in order to properly configure your phone you have to pay a fee. What? In order to properly configure my free phone I have to pay. No Obi that is not how this works. You don't use strong arm tactics against people who support your product. Its rather insulting. Try a Magic Jack at least they are up front about their service.

UPDATE: As of 9/11/2014 Google voice is back on the Obi. I know a lot of us were down because of the Google Voice dropping Obi support situation, but as of today I have received an email that says Google voice Obi compatibility is active again. This is for old and new Obi devices. I made a test call to my cellphone and it went through. I literally just plugged it back in and everything worked properly. I never removed my Google Voice info from the Obihai website, so I did not have to go and reenter anything. Glad to have my *free* back up home phone again.

By installing the obi 100 and the Vtech Dect 6.0 I officially do not need phone service. This thing gives you the exact same service that most cable companies are selling in a bundle with cable and internet. Problem with the cable company is that after the promotion runs out each service is about 60 dollars a piece. The price jumps from 99.00 introductory 12 month rate to a whopping full circle at 180 bucks a month. I asked and asked buy my cable company refused to put me back on promotion.
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Verified Purchase
***Update: 15 Sep 14***
After some issues with Google's support for Google Voice/OBI integration...OBI now apparently has GOOGLE VOICE support once again! I moved over to another SIP provider (which was still dirt-cheap) during the past few months when GV wasn't "officially" supported...but I will look at going back to GV now that it's apparently supported again. 3+ years later...and my OBI100 is still going strong.
*Original reviews below*

Approximately 2 months ago, I finally made the jump to buy both my wife and I smart phones. The price for the devices themselves has never really been an issue, but I could never justify such pricey monthly subscriptions. $80+/month? Each?? No way!! When I heard that Virgin Mobile had the LG Optimus with unlimited data/text available for just $25/month, the barrier had been broken. I could have one for myself and another for my wife, and we would actually be cutting our monthly cost. Buttt...300 minutes only? Ouch. Not really an issue for me, as I'm not a big talker...but the wife can go through 300 minutes in a week, never mind a month. What to do?

Enter the Obi100.

Using Google Voice and the Obi100, we're able to use a single number that rings our home phone and her cellphone. When she's home, she picks up the home phone. Using the home phone doesn't use any of her plan's minutes. When she out of the house, she uses the cellphone. As a stay at home mom, she's typically at home to use the obi-connected phone...so she has not come anywhere close to her 300 minutes (so far). So...that is why this was a great investment for us.

Setting the Obi up can be a bit of a headscratcher. The documentation included is a bit on the nebulous side.
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Verified Purchase
(Edited April 28, 2011)

The OBi100 is a FANTASTIC device. FIVE STARS FOR THE HARDWARE DEVICE ITSELF. The OBi100 is really small. And it's easy to hook up. There really isn't too much to say about the hardware itself except to say it's too easy to hook up. The OBi100 is designed to work with the various VoIP services that are out there. And, in particular, the OBi100 is "suppose" to work with Google Voice. Many people should have no problem getting the OBi100 to work with Google Voice (GV). Set up your GV account, log into Google Chat in GMAIL, and make at least one outgoing call from GMAIL. Then do the setup for the OBi100. The online OBiTalk setup for the OBi100 is relatively easy to follow. And then it should all work for both incoming GV calls and outgoing GV calls. The typical incoming GV call process could be illustrated as follows:

Incoming Call
Google Voice Number

But for some people, like myself, there could be a problem -- in particular, getting the phone connected to the OBi100 to ring on each and every incoming Google Voice call. Note that OUTGOING calls via Google Voice using the OBi100-connected phone were not a problem. The problem was getting the OBi100-connected phone to ring on each and every *INCOMING* Google Voice call. In other words, some incoming GV calls would ring but most other incoming GV calls would not ring. And this was with numerous repeated calls from the same phones calling into the GV number. It's was like: ring, not ring. If you don't encounter this problem, then consider yourself to be lucky and blessed.

I originally wanted to have my Google Voice to forward calls to my iPhone and also to the phone connected to my OBi100.
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