What's the phone number of 400?

400 telephone is a shared service between the calling party and the called party, that is, the calling party bears the local telephone access fee and the called party bears all the incoming call answering fees. At present, it is widely used in multi-industry pre-sales and after-sales service consultation. Virtual phone switchboard is specially designed for enterprises and institutions with unified numbers throughout the country. All calls to the 400 switchboard number are transferred to the preset fixed telephone, mobile phone or call center line.

Extended data

400 telephone platform mainly refers to the 400 telephone intelligent network platform invested and operated by operators, which realizes the direct transfer of 400 telephone numbers to the destination code specified by customers. There are also 400 telephone transfer platforms built by some operators. The principle is to first transfer 400 calls to a fixed telephone number segment, and then transfer from this fixed telephone number segment to the destination code provided by the customer.

reference data

Baidu Encyclopedia -400 Telephone