I am not able to make/receive calls from Zoho CRM. Why?

I am not able to make/receive calls from Zoho CRM. Why?

One of the major reasons you may be unable to make or receive calls from Zoho CRM is due to browser compatibility issues. In this case, go to http://clientsupport.twilio.com/. During the compatibility check, if you see any red boxes, report the error to Twilio. If all boxes are green and you hear a cowbell sound, then it means your browser is compatible.

Apart from this, these are the other reasons you may not be able to make/receive calls:
  1. You don’t have enough balance in your Twilio account to make/receive calls.
  2. Your browser does not have the Adobe Flash Plugin installed.
  3. You have changed VoiceURL or Status CallBack URL for Twilio PhoneNumber or TWIML application (named Zoho CRM) in Twilio. Do not change them.
  4. If you have changed the phone number properties but are unable to revert to default, then delete the phone number and add it again.