Retrieve Call:
Method: GET
Endpoint: /voice/c2d/{user_id}/calls/{call_id}/retrieve
System Authorization: Authorization: Key=your-auth-key
User Authentication: tokenKey: {token}
...
Retrieve Call:
Method: GET
Endpoint: /voice/c2d/{user_id}/calls/{call_id}/retrieve
System Authorization: Authorization: Key=your-auth-key
User Authentication: tokenKey: {token}
...