VOIP (Voice Over Internet Protocol) in more lay man terms is a phone service over the Internet.
If you have high speed Internet connection you can get phone service delivered through your Internet connection instead of from your local phone company.

I'm one of the abandoned SunRocket VOIP Subscriber who got switched to traditional phone service AT&T for local calls and DSL for internet connection.
The promise of lower DSL prices has convinced me to switch to DSL from Comcast.I had been a Comcast broadband subscriber for over three years. I realized I was was paying over $100 per month for high-speed Internet access and TV service, With Sunrocket going out of business I decided to abandon Comcast for Dish Networks satellite TV and AT&T's DSL service.Now I pay about $75 per month for TV and Internet access, and the savings roughly $50 per month over what I was paying for the Comcast service.

I'm glad Sunrocket closed its shop and in search of cheapest long distance phone a number of bloggers and forums started sharing how to use unlocked Sunrocket gizmo to recieve free incoming and free/cheap outbound calls.

Get up to 1,500 minutes of Free calls!

The problem I noticed with all the posts is that information of the whole set up is in bits and pieces from different web sources.Here is my step by step guide of how I managed to get FREE voip.

1) Grand Central - Getting an invite for Grand Central and setting up Grand Central account

GrandCentral is a brilliant new web app that lets you consolidate all of your phone numbers into one number, meaning someone can call you on your GrandCentral phone number and all of your phones (cell phone, work phone, home phone) will ring. And then it gets interesting. - source [Lifehacker]

Basically the Grandcentral number forwards your call to GizmoProject and then to Gizmo and finally to a phone connected to gizmo.

Grand Central has one of the settings as Gizmo which makes easy this call forwarding.

Grancentral is by invite only and this is site I used - http://www.inviteshare.com/ . Once you regsiter and request for invite,It should be on your way in less than 2 or 3 hours.
Once you get invite, setting up account at Grand Central hardly takes any time.

2) Install GizmoProject

http://www.gizmoproject.com/ - download GizmoProject

Collect SIP number by clicking ** (* twice) in dial pad and note down the SIP number 1747 XXXXXXXXXXX.
This number is required once Gizmo is unlocked.

3) Unlock Sunrocket Gizmo and change settings

Follow all instructions carefully as given in the site :

FOR WINDOWS USERS:
Download GETIF from http://www.wtcs.org/snmp4tpc/getif.htm

1 - After you start the tool enter the IP address of you device in Host Name field [enter - 192.168.251.1]
2 - Change the Read community to private (default is public)
3 - Click on start
4 - click on MBrowser tab
5 - St the bottom of the window you will see 3 fields that you can enter values in. The first field is the OID enter .1.3.6.1.4.1.3354.1.3.1.1.3.2.0
The second field is the type. Change it to string
the 3rd field is the value. Enter any value you want (That's the new password).
6 - Click on the set button

Make sure:
1. Firewall is NOT blocking port 161. Be sure to enable that port.
2. Be sure WAN is connected to internet connection, LAN directly to the machine you are trying to SNMP from.
3. Browse to http://192.168.251.1/Voice_adminPage.htm
and use admin and the password you just set!

Changing Gizmo settings -

I have used this site : Click me for Gizmo settings

Disable Provisioning. Go to IP Network-> Provisioning Setting. Uncheck the Enable Provisioning box.
Setup your SIP Proxy. Go to VOIP->SIP Proxy. Use these settings:
proxy01.sipphone.com

Change your User Account. Go to VOIP->User Account. Your user ID is your Gizmo Project SIP number with the one before it. Your password is your gizmo project password.

Test Setup Setup your gizmo so that it is directly connected to the internet. The order should be modem - gizmo - router.

Reboot gizmo - Unplug the power on your gizmo and plug it back in. When the gizmo is ready, click on Information - Register Status & Critical Messages. Line one should have a green box that says Registered below it. You should be setup to make calls!

4) Change Gizmo settings using Telnet (to avoid press 1, 2 , 3 and 4 instructions on phone)

Telnet into your Gizmo - Go to Command Prompt and type Telnet.
At Telnet prompt - type 'open 192.168.251.1"
This will prompt you for username and password - give 'admin' for user name and passowrd that you set in step 3.
1) Press C2 and make sure RFC2833 (SDP and 2833 packets) is ALWAYS OFF
2) Press Cs
3) Look for Use SIP INFO for DTMF = Yes
4) If it says no, then press c to change settings.

4.1) Look for 18. SIP INFO for DTMF
4.2) Press 18 to set it to yes
4.3) Press y at the following prompt Use SIP INFO for transmitting DTMF digits?[y/n]
4.4) Press w to write setting to Flash

You should be now accepting inbound calls without needing to press 1, 2 and 3.

5)Port forwarding using 2 WIRE [This step is for those who have DSL with 2WIRE router - similarly for cable modems or routers you need to log onto your router setting and do port forwarding]
->type http://gateway.2wire.net in the internet explorer.
->Follow port forwarding steps as described below. Click me for port forwarding.

Done!!

All incoming calls are free (Grand Central beta gives incoming for free for now) and for outgoing long distance calls buy credit from Gizmo Project which is 1.9 cents/minute.

Worldwide calls as low as 2 cents a minute

Labels: Deals, free, SUNROCKET, VOIP