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Obihai Technology, Inc. > 
Item#: N82E16833617001

Obihai OBI100 VoIP Telephone Adapter with SIP

  • Internet (WAN): 1 x 10/100BaseT Ethernet Port (802.3)
  • Phone (FXS): 1 x RJ-11 FXS Analog Phone Port
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Learn more about the Obihai Technology, Inc. OBI100






Local Access Interface: IVR Password
Remote Access Interface: User Name & Password Access via HTTP, TFTP - HTTPS
Device Web Page Standard: HTTP v1.1, XMLv1.0
Secure Remote Provisioning: TFTP, HTTP, HTTPS
Internet (WAN): 1 x 10/100BaseT Ethernet Port (802.3)
Phone (FXS): 1 x RJ-11 FXS Analog Phone Port
Power On, Device Status, Upgrade in Progress Status, Packet RX/TX, Phone Port Status
Input Power: AC Input: 100 to 240 Volts, 0.3A, 50-60Hz (26-34 VA)
Output Power: DC: +12V, 1.0 Amp Max
2.6" x 3.5" x 0.9"
7 ounces
0 degree C to 45 degree C
10% to 90%, Non-Condensing
VoIP Telephone Adapter & Voice Services Bridge with SIP, Google Voice, OBiTALK & Telephone Interfaces

Chip Vendor: Obihai SoC
Width of Machine Word: 32 bit
Instruction Set: MIPS

Mounting: Desktop Mountable

FXS SLIC (Subscriber Line Integrated Circuit):

Ringer Specifications:
Ring Frequency: 14Hz - 68Hz
Ring Waveform: Trapezoidal, Sinusoidal
Ring Voltage: 55v - 85v

Maximum Ring Load: 5 REN (Ringer Equivalence Number)

FXS (PHONE Port) Configuration Settings:
Recursive Digit Map & Associated Outbound Call Routing
On-Hook Tip Ring Voltage: 30v - 52v
Off-Hook Current Max: 15mA - 45mA
Impedance: 12 Independent Settings DTMF Playback Level: -90 dBm - 3dBm
Caller ID Method (FSK Bell202, FSK V.23, DTMF FI/SE/DK)
Caller ID Trigger (Before / After First Ring, Polarity Reversal)
Channel Tx Gain: -12dB - 12dB
Channel Rx Gain: -12dB - 12dB
Silence Detect Sensitivity
HookFlash Time Max
HookFlash Time Min
CPC Delay Time
CPC Duration
Idle Polarity
Connect Polarity

Data Networking:
MAC Address (IEEE 802.3)
UDP (RFC 768)
TCP (RFC 793)
IP version 4 (RFC 791) - Static IP and DHCP Support
ICMP (RFC 792)
ARP - Address Resolution Protocol
RTP (RFC 1889, 1890)
RTCP (RFC 1889)
DHCP Client (RFC 2131)
DiffServ (RFC 2475) - Independently Configured: Service, SIP & Media
ToS (RFC 791, 1349) - Independently Configured: Service, SIP & Media
VLAN Tagging (802.1p) - Independently Configured: Service, SIP & Media
SNTP (RFC 2030) - Primary & Secondary NTP Servers

*More information, Please see obihai website.


Robust Telephony Features:
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
Caller ID Spoofing
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

Powerful Call Routing & Voice Service Features:
SIP Support for Voice and Fax Over IP from Internet Telephony Service Providers
OBiTALK Managed VoIP Network for OBi Endpoint Devices & Applications
High Quality Voice Encoding Using G.711, G.726, G.729 Algorithms
Recursive Digit Maps & Associated Call Routing (Outbound, Inbound)


Package Contents
OBi100 Voice Service Bridge and Telephone Adapter
Power Adapter
1 x RJ-45 Ethernet Cable (80 inches / 203 centimeters)
Quick Start / Installation Guide

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Obihai Technology, Inc. OBI100

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  • Jesus A.
  • 4/15/2014 6:19:28 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsExcellent for DOY VoIP

Pros: * Low cost
* Very good voice quality
* Not tied to a specific VoIP provider
* Remote web management at
* Supports two VoIP service providers
* Supports softphones

Cons: * White plastic shows some discoloring after a year. Black or dark gray plastic would last longer.

Other Thoughts: Used the Obi100 with Google Voice for over a year with excellent results. It is very reliable and voice quality is about as good as landlines (assuming a stable Internet connection).

Due to GV discontinuing XMPP in May, I switched to Callcentric and Localphone. Callcentric has free DIDs in NY with free incoming calls. Localphone has low rates for outgoing calls on a pay per call basis. The GV DID can be forwarded to Callcentric so yo don't have to change numbers.

Having two service providers gives you the flexibility of having one for incoming calls and one for outgoing calls. You could also receive calls from both providers, although with a single phone jack you can't answer both calls simultaneously.

Many VoIP providers support the Obihai adapters without a fixed monthly fee that are very economical for low outgoing call volumes. If you make a lot of outgoing calls, a yearly plan such as Vestalink or Anveo may be justifiable.

Did you find this review helpful? Yes No

  • Anonymous
  • 2/28/2014 11:05:36 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsLow Cost Internet VOIP

Pros: inexpensive cost up front
low monthly cost (if you select the correct VOIP service)

Cons: Not exactly plug and play technology
Google Voice will not work after May 15, 2014

Other Thoughts: I have used Phone Power for several years. I purchased this device a few months ago and planned to switch over to Google Voice when my 2-year Phone Power contract ran out. However, Google Voice just announced that it will stop supporting OBi on May 15, 2014. Luckily, I just found a new VOIP provider, Vestalink a/k/a Intelafone, which works with OBi. While it's not free like Google Voice, the cost is only $30-$40 per YEAR, depending on the plan you select. This includes unlimited calls and E911, and there are NO taxes or fees or surcharges. Ooma, in contrast, costs $5.00 per month just in fees, taxes and surcharges. As a result, this device ends up providing phone service cheaper than Ooma, Phone Power or almost any other VOIP out there. Call clearity on the OBi is good. You can use an App on your smart phone to access the OBi voice mail. Also, you can use the App to make phone calls on your smart phone when you have WiFi access (if you want to preserve your wireless minutes).

Did you find this review helpful? Yes No

  • Christian S.
  • 2/23/2014 5:01:40 PM
  • Tech Level: High
  • Ownership: more than 1 year

4 out of 5 eggsGoogle Voice compatible

Pros: I've been using this unit for over two years, thanks to the seamless integration with Google voice number (incoming and outgoing calls).
We've learned a few months ago that Google will drop XMPP support, protocol that Obi uses to connect GV to this device, so, ObiTalk will just become another VoIP SIP product...

Cons: Added value highly dependent on Google Voice integration, that's a con because google will drop the protocol that enables calls through Obi in May 2014.. So... unless there is a free workaround it's kinda useless for me.

Other Thoughts: Great device that knows how to integrate the best of VoIP: Provides it's own network so each device can communicate with other Obi Devices without setting any account, and compatibility with Google Voice and regular SIP providers.

1 out of 1 people found this review helpful. Did you? Yes No

  • Victor T.
  • 2/16/2014 7:37:36 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggs

Pros: non

Cons: Google Voice does not support anymore. Google gmail account does not support Google chat forwarding. Unless your account was set up to Google chat forwarding awhile ago (in 2013) . try to find and install Google Talk., it May help
to change Google Voice to Google chat forwarding option appears in your setting,.but that only my thought.

1 out of 2 people found this review helpful. Did you? Yes No

  • 2/11/2014 5:52:29 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsGreat when it works....

Pros: Greta product when it works ...

Cons: In my case, I must have gotten a LEMON! From day one, I have been having multiple problems. My unit gets hot and then it drops connection. Technical "support" and customer "service" are a joke!

Did you find this review helpful? Yes No

  • Patrick V.
  • 1/16/2014 12:41:06 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat product

Pros: Works great with Easy setup, excellent call quality.

Cons: None yet

Did you find this review helpful? Yes No

  • Jonathan R.
  • 1/4/2014 8:59:49 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsBest VoIP Solution I've used

Pros: Set-up is easy, a quick visit to the Obihai website and you're up and running in a few minutes. Call quality is great even without QoS.

Cons: None

Did you find this review helpful? Yes No

  • Libo Y.
  • 12/27/2013 5:39:12 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsWarning: Don't waste your money

Pros: I have a pap2t and I bought it mainly because its rating is very high. I guess it receives such high ratings mainly because it can be easily used with Google voice.

Cons: I am using Bell's model and wireless router. Yet this adapter even cannot register itself with obi servers and echo test also fails. I tried to set up freephoneline with it and it failed to register. I believe it is not compatible with my network environment. Eventually, I had to use my pap2t and the setup was really easy.

1 out of 3 people found this review helpful. Did you? Yes No

  • Ronald R.
  • 12/26/2013 2:28:32 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsVastly decrease POTS costs

Pros: Good price for all the functionality.
Allows 2x VoIP service providers.
Supports Google Voice for REALLY cheap calls.
Supports SIP for good commercial (but still cheap) VoIP.
Callcentric works great on these bridges.

Cons: Configuration via direct HTTP interface is esoteric and requires careful study of User Guide and/or Googling. Once you figure out how to manipulate digit maps and call routes, it's VERY powerful.

Google is pulling the plug on 3rd party use of Google Voice service (March 2014). All of these BYOD VoIP bridges will require a SIP account afterwards, or you're limited to ObiTalk.

Other Thoughts: I got an OBi110 with POTS input back in Feb 2013 and went from paying $35/month for landline to <$5/month for Callcentric VoIP + now-free Google Voice outgoing.

Got another OBi100 without POTS input in order to share the Callcentric account with another location as a separate extension. Same incoming phone number and Google Voice.

Even though Google is pulling the plug on my now free outgoing phone calls, I just have to switch a couple of settings and start routing everything through Callcentric. Will probably cost about $1.50/month extra for Callcentric outgoing calls. This is still TONS cheaper than my local POTS provider, and I get a lot of extra services (Caller ID, online voicemail, real E-911).

1 out of 1 people found this review helpful. Did you? Yes No

  • Wade E.
  • 12/16/2013 3:18:03 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsFastest Install Ever for GoogleVoice

Pros: Easy self install using Google+ for my GV account. Worked first try. Excellent voice quality.

Cons: Report that Google Voice will discontinue support in May of 2014.

Did you find this review helpful? Yes No

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Home > 
Electronics > 
Telephones / VoIP > 
VoIP > 
Obihai Technology, Inc. > 
Item#: N82E16833617001
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