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Author Topic: Route Google Voice calls through a Callcentric phone number (updated 5/2020)  (Read 14382 times)
SteveInWA
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Posts: 6433



« on: May 07, 2020, 02:03:32 pm »

Google Voice inbound calls only display the numeric portion of caller ID, and not the Caller ID Name (CNAM).

This is an updated (May 7, 2020)  set of instructions to (optionally) set up Google Voice to detour calls through a Callcentric inbound phone number, which adds Caller ID Name (CNAM).  Note that the old instructions, dating back to 2012, are obsolete; don't use those instructions.


  • Assumptions:  you already have a working inbound Google Voice number, which you have previously configured on one or more  OBiTALK ATAs or IP phones, and you have intermediate-level technical skills to configure settings on websites.  In these instructions, we assume you have Google Voice setup on SP1, and that you have one other unused SPx that can be configured to use Callcentric.
  • Callcentric (CC) is a no-frills SIP VoIP ITSP, which sells inbound calling and outbound calling separately (a la carte).  CC formerly had free inbound telephone numbers (DIDs) in NY; they now charge $1/month for those numbers, which include unlimited inbound calling with caller ID and CNAM.  They also now have a very inexpensive combination of 120 minutes of outbound calling and E911 for $1.95/month.  Compare this to the $1.50/month fee for only E911 and it's a no brainer, to have those available minutes in case your Google Voice service is temporarily broken.  https://www.callcentric.com/rate/plans/north_america_basic/.
  • Sign up for a CC "Dollar Unlimited" DID (inbound), and sign up for the NA Basic plan (outbound & E911).  As a CC user, you now have a CC account, with a password to access the site.  You will then add services (inbound and outbound), and set up a SIP password for each DID added.  The SIP password does not have to be the same as the overall CC account password.  Make the password long and use random characters.
  • Now that you have subscribed to CC services, use their dashboard to set up the extension you just added for inbound calls.  Write down the username (1777xxxxxxx) and the SIP password you just created.  Click on “Preferences” and then click on each of the gray tabs to edit your settings.  Enable CNAM, and set voicemail to answer after 30 seconds.
  • Sign into the OBiTALK dashboard (http://www.obitalk.com/obinet/pg/obhdev) and click on your device.  You'll see your Service Provider (SP1-SP4) configurations.  Assuming SP1 is Google Voice, click on SP2.  Decline the offer to configure this SP for Google Voice.  Scroll down to the bottom of the page and click "OBiTALK Compatible Service Providers.”  On the next page, click on Callcentric.  On the next page, fill in the boxes.  The proxy server is callcentric.com, and the proxy server port is 5060.  Use the 1777 number for the account number, and the SIP password.  Check the box to use this service for emergency calls.  This will automatically configure your device to use this number and to route all 911 calls to SP2.  Make some outbound test calls, and call the number from some other number, to confirm that it works. Set up your CC voicemail box (record a greeting).
  • Sign into your Gmail account and go to the Google Voice settings page:  (https://voice.google.com/settings).  Go to the "Linked numbers" section, and click "+New linked number".  Add your new CC DID number (the actual telephone number, which typically begins with a New York State Area Code, NOT the 1777 number).  Complete the verification phone call.  Scroll down to Calls-->Inbound calls. There are green or gray toggle switches to the right of each device.  Toggle OFF your OBiTALK device, and toggle ON your CC phone number below that, in the Linked numbers section.
  • Now, when someone calls your Google Voice inbound phone number, their call will be forwarded to your CC phone number, which you have enabled to ring on your OBiTALK device.
  • Call your Google Voice number.  Your OBi-attached phone should ring and display the phone number and the name (or, if the name is unknown, it will display some generic information).
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