What does the intelligent switchboard of Tietong Weifang Branch mean?

The common understanding of intelligent switchboard is: for example, a company has an after-sales service phone, but when all employees are off work and no one is by the phone, they can automatically transfer to your preset portable phone through intelligent switchboard. How convenient! You can also set a color ring back tone. For example, if you dial mobile 10086, there will be an automatic voice prompt ~