Over the past few years Voice over IP (VoIP) has continually grown as a viable option for a home telephone line. Each new VoIP provider tries to compete by providing many of the same services for less money that current telephone providers offer to their customers. This guide will show you how to get more telephone services and for FREE by making your Mac (or PC) into a telephone.
GETTING STARTED
To get started turning your Mac into a telephone we’ll need a few free services and software.
First, you’ll need a GrandCentral.com account and phone number. Grandcentral.com is a website that provides a New Way To Use Your Phones and was recently purchased by Google. GrandCentral.com offers an amazing amount of phone services to its customers and all for free. We’ll discuss these features later in the article.
Second, you’ll need to download Gizmo from gizmoproject.com and create an account. Gizmo, when combined with Grandcentral.com features is what turns your Mac (or PC) into a powerful and free telephone.
Creating an account with both is free and simple.
GRANDCENTRAL.COM
GrandCentral.com is still in Beta but you can already reserve a phone number for your area and sign up for the beta. Like many of the other beta products that Google has, invites are given to its current beta user so you can share the service with others once you gain access. Post in the comments if you’d like us to send you an invite. Once you have a GrandCentral.com account and phone number you can start taking advantage of some of its many features including:
- Screen Callers – Know who’s calling and screen unknown callers
- ListenIn – Hear why someone is calling before taking the call
- Call Record – Record calls on the fly and access recordings online
- Block Callers – Unwanted callers won’t be able to reach you anymore
- Notifications – Receive voicemail notifications via email or SMS
- Ring Different Phones – One number that rings different phones based on who’s calling
- Greetings -Personalize your voicemail greetings by caller or group
- RingShare – Go beyond the ring and choose ringback tones for your callers
- WebCall Button – Let people call you from a web page without showing your number
- CallSwitch -Switch phones in the middle of a call
- Click2Call – Call from your addressbook and save your typing
- Mobile Access -Visual voicemail for your mobile phone
As you can see, many of the services that are offered to GrandCentral.com users include technologies that no VoIP or Telephone company can offer. I personally love the ability to switch phones (from my Mac to my mobile phone to my wife’s mobile phone) in the middle of my conversation, and the visual voicemail features that can be accessed from anywhere I can log on to the Internet.
GIZMO
Head over to gizmoproject.com to download a free copy of Gizmo for your Mac. The Mac version is currently at version 3.1 and works great in both OSX 10.4 and 10.5. Gizmo is a lot like Skype but has the capability to receive calls from normal telephones by using your GrandCentral.com phone line for free.
After you’ve downloaded and installed Gizmo you need to follow a few steps to tie your new GrandCentral.com phone line to your computer:
- Open Gizmo and login to your new account.
- After the Gizmo client has connected, click Account from the Menu bar, and then My Profile
- Copy your SIP Number before the @ symbol and login to GrandCentral.com
- Click the Settings tab once logged into GrandCentral.com and click the Add/Edit Number link
- For the new line, select Gizmo from the drop down list and enter in the SIP number you copied from your Profile.
- Be sure to check “all callers” so that all calls to your GrandCentral.com number will ring your computer.
- Save the changes and prepare to test out our new phone line.


RECEIVING YOUR FIRST CALL
Now that we’ve tied Gizmo to your GrandCentral.com phone number, pick up your current landline or cell phone and call your new GrandCentral.com phone number. Your Computer’s Gizmo client should start ringing and let you know that a call is incoming. Click Answer Call and start your conversation by using the microphone built into your Mac. Click Hang Up on Gizmo when you’ve finished your conversation to end the call.

CALL YOUR FRIENDS, FAMILY, AND MORE FOR FREE
Unlike many other free VoIP computer clients, the combination of Gizmo and Grandcentral.com allows you to make UNLIMITED CALLS to normal phone lines for free. There is no restrictions on who, when, or how you call people. To make an outgoing call to any landline or mobile phone login to Grandcentral.com, click your Address Book and either enter in a new contact with their phone number or click the CALL BUTTON next to a contact you’ve already added. Select your Gizmo line and GrandCentral will call you and connect you to the number you’re calling.
Having to navigate to the website to make a call can be a few too many steps for you, but you can always follow our tutorial on how to make dashboard widgets with Safari to create a widget of your GrandCentral.com address book. Then making a call is just 2 clicks away.

CONCLUSION
Although GrandCentral.com + Gizmo offer an outstanding number of features, the service does lack some capabilities that you’ve grown accustom to with traditional phone services, such as 3 way calling. But, for most of the traditional phone features you can find a way around it. For example, if while in the middle of a conversation on your new MacPhone you decide you need to make a 3 way call you can use the Call Switch feature to send the conversation your having to your cell phone and use your mobile services to call the 3rd party.
Additionally, you may want more of an actual phone to replace your landline. You can pick up most Wifi capable phones and set it up with Gizmo to allow you to receive free incoming and outgoing calls from your GrandCentral.com account.
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27 Responses so far.
Darin
February 21, 2008 at 2:45 pmI would like an invitation to GrandCentral.
Thanks!
Peter
February 21, 2008 at 5:19 pmCan I get an invite also? Thanks
Greg
February 22, 2008 at 12:26 amThanks for the great article. I would appreciate an invite to GrandCentral if you would be willing to share one.
Dan
February 22, 2008 at 1:22 amThanks for the feedback. The invites to Grandcentral have been sent on my end. I only have a few more invites to give out.
Val
February 22, 2008 at 6:01 amCan I get an invite as well?
Thanks.
Tom
February 22, 2008 at 6:48 amHi, Dan. Great and timely article–glad you commented on the Get Rich Slowly blog! I would appreciate a GrandCentral invite if you have any left. Many thanks.
Dan
February 22, 2008 at 10:01 amTom, Val – Invites sent. Let me know if you have any problems or questions!
Dunn Miller
February 22, 2008 at 2:04 pmI, too, would like an invite. Thanks! And thanks for all the info. Found you on my beloved Get Rich Slowly and I think you may have led me to the answer I've been looking for for quite some time.
Val
February 22, 2008 at 6:02 pmI got it all set up, but when I call my Gizmo/GrandCentral from my landline phone, it tells me to press 1,2,3 or 4. I press it but nothing happens. I don't know how to pick up fully.
I can call people though. Thanks!
Dan
February 22, 2008 at 10:06 pmHey Val, to pick up with Gizmo using some of the advanced Grandcentral features you need to push 1,2,3 or 4 on the dialpad on Gizmo. To show the dialpad click the dialpad icon on the bottom left of the gizmo application. That should allow you to answer, listen in, or send to voicemail.
Val
February 23, 2008 at 6:08 amOh! Thank you so much, Dan.
Dunn Miller
February 23, 2008 at 9:46 amHi there! Still hoping for an invite. Don't want to be a pest.
Dan
February 23, 2008 at 10:49 amDunn – I sent an invite to your gmail account yesterday.
Francesca
February 25, 2008 at 7:50 amHello, could I get an invite to GrandCentral please?
Thank you!
Francesca
February 25, 2008 at 2:26 pmThanks very much! I'm having a bit of a problem, though; don't know if you could offer any advice. The echo test works just fine, so the microphone is working. And when I call from my cell phone, Gizmo does register that the call is happening, but though I can connect, I don't hear my voice either through the cell phone or the computer speakers. Any idea what's the problem?
Francesca
February 26, 2008 at 12:13 amNever mind; it resolved itself for some reason, and it now works perfectly! Thanks!
Lonnie
February 26, 2008 at 7:52 amHow do you switch calls with Gizmo? I click the star button but it doesn't do anything.
Dan
February 26, 2008 at 12:32 pmLonnie, You have to click the * key on the dialpad of gizmo not the * key on the keyboard. The dialpad can be displayed by clicking the bottom left link on the gizmo application.
Also, for grandcentral.com call switch it has to be an incoming call to your grandcentral number.
badamaa
March 12, 2008 at 1:20 pmHi, can i get an invitation please, thank you.
Tameka
March 13, 2008 at 7:37 amI would like a invite to GrandCentral Please. Thank you
Dan
March 14, 2008 at 1:26 pmbadamma and Tameka:
It appears that because of the open invitation to any blogger users that grandcentral.com has removed invites from current users.
I will send you an invite as soon as they give some back to us. For now, I suggest you reserve a phone number and look forward to one of their invitations.
John Maher
March 15, 2008 at 1:05 pmI would really like a invite please. Thank You for helping
safari 3.1 beta download
March 19, 2008 at 4:59 am[...] for both Windows and Mac users. So what??s new in this version? According to Apple,www.hongkiat.comMake Your Mac A Phone: The MacPhone Over the past few years Voice over IP VoIP has continually grown as a viable option for a home [...]
leo B
March 28, 2008 at 7:43 amCould I, please, have an invite?
lb002005@pomona.edu
Thank you ever so much for the help.
JÓM
March 25, 2009 at 10:29 amHi There, could I get an invite to GC when you get a chance?
cheers.
James
GrandCentral Tools for iPhone - GrandDialer
May 27, 2009 at 6:29 am[...] Twitter Aaron // GrandCentral, a phone service from Google that lets you “ring” multiple phones anytime you receive a call, has recently released their own iPhone application GrandDialer. We’ve discussed GrandCentral previously and how combining it with Gizmo allows you to turn any Mac computer into a free phone. [...]
wends
June 21, 2010 at 1:17 amThis is really cool, i like it coz it's giving me a quick guide for macphone, but is there any other provider that offers macphone? please let me know. thanks!
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