How do you keep records of sip calls from clients?

Question

CRM

For a team of 3 people, a budget (preferably free) accounting for sip telephony calls is required.
Requirements:

• Incoming call notification
  
• picking up a contact from the address book
  
• call history,
  

Cloud telephony (mango talker).
The branded disktop client is not satisfied with the fact that:

• cannot upload/download address book
  
• when you call, the program takes focus on itself, which is why you automatically print something, take the call.