For non-technical (non programming) questions and questions related to RingCentral products, please use the RingCentral user community. You will get better answer there.
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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incoming-call-pickup subscription works in sandbox but not production
Ring Central problems with inbound events
ImportError: No module named observable in python test SMS,ImportError: No module named observable for SMS quick start
python package ringcentral uses outdated pubnub lib, so its impossible to use it