*Professional can have API Temporarily turned on by contacting their Account Executive. Professional can also purchase API by contacting their Account Executive.
Please review the article: Enabling API
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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