The constant has not been declared, and there is NO indication what it could be.
Are you talking about this link?
Most probably the constant
will be the true for production
Thanks for pointing out the missing param! It is just true or false for production environment or sandbox environment, respectively. I will update the dev guide asap.
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.
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