What is the function of 400 telephone?

The incoming call screen means that when a customer dials the call center, the system will automatically pop up the relevant information of the calling customer. The function of the call pop-up window is as follows: 1. The new number pops up on screen 2. The existing number pops up on screen 3. Pop up incoming call contact 4. Pop-up customer main information 5. Pop up customer consultation record 6. Multiple contacts pop up under Customer 7. Pop up the complaint record 8. Pop up complaint record 9. The sales record 1 1 pops up. More support.