DID Billing Time explained

Which time in DID is billed?

Lets imagine we have a call, which consists of such parts:

Where:

• A - when call hit DID and call was answered, this happens when system asks for DID, plays some message or similar
• B - when call was sent to Provider
• C - when call was answered by final user

Then:

• DID billable time is A - End
• Normal call billable time is C - End
• B - End is Call Duration
• C - End is Call Billsec