Number inquiry desk

A call center is a service in the telephone system where users dial a specific number to inquire about the desired phone number. The rotating folder number lookup table is an early number lookup system consisting of multiple rotating folders, each of which stores phone number information sorted alphabetically or numerically. The operator manually rotates and searches the folder to quickly find the desired number. This system was widely used in the mid-20th century, improving the efficiency and accuracy of directory lookup.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Everyone knows about '114'. Dial '114', find a phone number, and the operator will search on the computer in a few seconds. But more than thirty years ago, it was not so easy. Each 114 telephone operator had to possess unique skills. In addition to memorizing a large number of phone numbers, they also had to be able to quickly retrieve them from the dense "folder". The "09" rotary gear clamp number inquiry table is the predecessor of 114 telephone inquiry. In 1931, the operators of the American Shanghai Telephone Company first used the rotary gear clamp to check telephone numbers to answer user inquiries, greatly improving labor efficiency. The rotating folder is a complete directory information unit arranged by user classification and stroke order, recording the telephone numbers of the entire city of Shanghai at that time. According to the other party's request, the operator quickly searched for the phone account name strip stored in the rotating gear clip, found the number, and verbally answered the user, taking an average of only 20 seconds each time.