Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.
Download RingCentral Phone for Desktop:
Tip: switch to the "sandbox mode" before logging in the app:
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Fax by Email results to 'Sent' - Fax by API results to 'Unknown' everytime using same PDF attachment
We need to reset the "client secret" for a custom web app
Authention issue while getting token using Auth code ,3-legged oauth code flow error
Where to find DeviceID of RingCentral App. (Not the softphone)