Twilio Dialer is used to provide VOIP service for Twilio users that can make and receive voice calls.
If you don't have a Twilio account open one here: https://www.twilio.com/try-twilio
Twilio Dialer Provides:
1) International calls
2) You can perform PSTN calls
3) Twilo Dialer provides calling services to over 80+ countries.
4) You can easily switch between multiple numbers.
5) Recordings of calls
You First Require:
1) Twilio account
2) If you plan to make calls internationally then you have to provide special permission on "Voice Geographic Permissions page"
3) SID and Auth token
