What is a Pager?

Received user receiver in a radio paging system. It consists of super heterodyne receiver, decoder, control and display. ^[1]

The BP machine has two modes: manual tandem and automatic tandem. The corresponding paging stations are called manual paging stations and automatic paging stations. Manual paging stations require manual operation to encode this information and send signals through the transmitter. The automatic paging station automatically finds out the phone number of the pager and sends it out at the same time according to the line number of the incoming call, so that the paged person knows which phone was paged. Frequently used pagers fall into two categories: digital pagers and Chinese pagers. Digital pagers are small, inexpensive, and practical. The Chinese pager directly displays Chinese characters, and the information is easy to identify. ^[2]

Types can be divided into five categories according to the different pager tone and message mode after the pager receives the paging local identification code and message.

Sound pager, sound the representative message;

A voice pager that emits a voice for 10 seconds;

The digital pager emits sound (or vibration) and displays the digital code representing the message;

Alphanumeric-digital pager that sounds (or vibrates) and displays both alphanumeric and numeric messages;

Chinese character pager emits sound (or vibration), and displays Chinese characters, letters and numbers at the same time.

As small as possible, light weight, low price and low power consumption. The pager has a wide range of services from receiving numbers and simple phrase messages to receiving Chinese characters, documents, notifications, stock markets, etc., and can even be used as a terminal for telegrams and data networks. Chinese character display or digital display pager's sensitivity is better than 10V / m or 5V / m; Adjacent channel selectivity is better than 60dB (VHF frequency band); Digital display bit length is not less than 12 bits; Mean time between failures is not less than 30,000 hours .

If you want to find person A, but you are not at home.

Just call the pager,

Say A, quick call or something.

After seeing it, A will call you back via public telephone or the like.

In 1983, Shanghai opened China's first paging station, and BP entered China.

In 1948, Bell Labs developed the world's first pager, named BellBoy. Now that its practical significance has become increasingly weak, the collection of pagers should still attract people's attention.

Nowadays, with the popularity of mobile phones, the national paging industry has become history.

Relevant data show that as of the end of October 2007, the total number of mobile phone users in China has exceeded 320 million. In the first 10 months of 2007, China s mobile phones increased by an average of 5.5 million households per month.

"Now that China's economy and science and technology are at a high-speed development stage, adapting to a high-quality living standard and accelerating work rhythm requires continuous use of more advanced communication tools, which is the result of the country's progressive development." Ordinary citizens said.

At that time, the boss of a paging company in Yinchuan reluctantly said that the prices of mobile phones and pagers were getting closer and closer, pagers no longer had a comparative advantage, and the paging industry was bound to decline. It was an unstoppable rule that new things replaced old things.