Category: Industrial News

Categories: Industrial News

Fixed Landline Telephone History

4. Foreign investors build Shanghai landline telephone

In 1882, the Great Northern Telegraph Company set up a magnet-type manual telephone exchange at No. 7 on the Bund, erected telegraph poles in the Shanghai Public Concession and the French Concession, and installed 25 telephones. The annual rental fee for telephones per household was 150 yuan. There is a public telephone. This was Shanghai’s first commercial telephone exchange six years after the invention of the telephone, and only five years later than the world’s first telephone company, the American Bell Telephone Company, which is now the American Telephone and Telegraph Company (AT&T).

At that time, there were 41 actual users, including 38 foreign banks and 3 Chinese commercial banks. By the end of the year, the number of users had increased to 338, and the rental fee for each household was 150 yuan per year. In the same year, British companies such as China Toyo Telephone also established telephone companies in Shanghai.

Huang Shiquan recorded in “Songnan Dream Video Recording”: “The method is to erect wooden poles along the way and tie two lead wires to them, which is no different from the telegraph. However, the mechanism is completely different. The method of transmission does not use letters to assemble it, but only The message must be communicated to the end of the line, just like talking in a room. According to the cloud, within twelve o’clock, it can be transmitted to the five continents of the earth.”

The significance of the installation of these local telephones is different from the point-to-one intercom telephones of the previous steamship merchants. These 25 places with telephones can communicate with each other, and the transfer is realized through the telephone exchange. There are many connections in front of each operator. board, when the caller makes a call, the corresponding socket will light up, and then the operator can pick up the phone and ask you where to call. If the phone number is within the range of his management, he will insert the line plug into the corresponding socket. jack, then the called party’s home phone starts to ring, and the two parties can talk.

Shenzhen EAST LINE are the OME landline telephone manufacturer.

5. The development of China’s telephone industry in the Qing Dynasty and the Republic of China

In 1900, under the promotion of the Qing government, Liu Kunyi, the governor of Liangjiang and the minister of Nanyang, “due to the defense and martial law, the vast area of the province, the civil and military personnel were stationed far away, and when there was an incident, the business was spread, and the delay was carefully considered.” Set up a telephone and use a wire to convey messages, hoping to respond well.” He established the Jiangnan Electric Power Bureau in Rundli, Nanjing, and set up a telephone exchange (also known as the “Telephone Central Office”). He initially set up a 50-door magnet manual switchboard and installed 16 single machines, all of which were used by the official residence. .

In 1903, the Tianjin Telephone Bureau was established.

In 1904, the Beijing government-run telephone exchange was established.

In February 1907, the State Administration of Telecommunications of the Ministry of Posts and Telecommunications of the Qing government established the Shanghai Telephone Bureau in Xinquanli Street outside the East Gate of Shanghai South City based on the commercial telephone of 1902. It rented three private houses as office rooms, with a total of It had 19 employees and had 97 users when it opened, breaking the situation in which foreign companies had monopolized Shanghai’s telephone communications industry since the establishment of the foreign telephone company in 1882.

Telephones have limitations such as a limited transmission distance, which can only “reach a distance of sixty miles”, and “a person with many languages cannot understand many languages”, so there is a long way to go for improvement. Therefore, after the telephone entered China, it did not spread to all parts of the country as quickly as the telegraph did.

In 1889, Peng Mingbao, who was in charge of Anqing’s telegraph business in Anhui at that time, designed and manufactured my country’s first telephone, named “Microphone”, with a communication distance of up to 300 miles.

In 1929, a long-distance line was laid between Nanjing and Shanghai. A pair of lines passed through Zhenjiang, Wuxi, Suzhou, Kunshan and other places. The call was in one place and stopped in other places. Later, a pair of lines were added directly to Shanghai. To make a long-distance call, you must first dial the record number and register. There are two types: urgent and regular. Because there are too few lines, there is an unwritten rule: business people give way to military people, military people give way to air defense, and small officials give way to big officials. When Chiang Kai-shek calls, all people give way except air defense.

6. The development of telephone after the founding of the People’s Republic of China

In 1949, China’s telephone penetration rate was only 0.05%, and there were only 260,000 telephone users.

In 1970, Denmark first used the F-68 digital push button dialing telephone, replacing the rotary dial type.

In 1978, China’s telephone capacity was 3.59 million, users were 2.14 million, and the penetration rate was 0.38%, less than 1/10 of the world level.

In 1982, China’s first 10,000-door program-controlled telephone exchange, the Japanese F-150, was put into use in Fuzhou. This work began at the end of 1979. During the equipment selection stage, my country successively cooperated with 8 companies including Fujitsu, NEC, Ericsson, and Philips. Negotiated with manufacturers and conducted a short-term equipment selection inspection in Japan. The Fujian Provincial Post and Telecommunications Administration signed an introduction contract with Fujitsu on December 24, 1980. The local telephone equipment was shipped from Yokohama, Japan on January 30, 1982. It was installed on April 12 and officially opened at 0:00 on November 27.

In 1985, Shenzhen issued my country’s first set of phone cards, with a total of 3 cards and a face value of 87 yuan.

The initial installation fee for installing a local telephone in 1991 was 1,500 yuan.

In 1995, the initial installation fee for local telephone calls was 3,500 yuan.

In March 2003, the number of fixed-line users reached 225.626 million, and the number of mobile phone users reached 221.491 million. The number of mobile phone users is about to equal that of fixed-line users.

Shenzhen EAST LINE’s annual capacity of landline telephones is around 3 Million units for home, office, hotel, schools etc.

Slim Corded Telephone Trim Line Phone With Hard Shell

Categories: Industrial News

Fixed Landline Telephone History in China

In China, the telegraph and the telephone appeared at about the same time. After the telegraph line was built, the telephone also entered China. In many cases, telephone lines and telegraph lines were shared, and the development trajectories of the two were almost parallel. They were not It took many years after the telegraph was introduced to China before more advanced telephones slowly appeared. The phone number in this issue refers to a landline phone, also known as a “landline”, not a mobile phone (cell phone).
Shenzhen EAST LINE are the professional OEM landline telephone manufacturer.

Multi-feature Big Buttons Analog Telephone

1. Invention of telephone

In 1861, a German teacher invented the original telephone, which used the principle of sound waves to communicate with each other over short distances, but it was not put into actual use.

There has always been controversy about the inventor of the telephone. Some say it was Antonio Meucci, another said it was Bell, and another said it was Elisha Gray. There are many such things. The most famous one is Newton and Leibniz’s theory of micro-organisms. In the story of points, the main controversy is Meucci and Bell.

In 1849, the 41-year-old Meucci accidentally discovered that wires could transmit some sounds during an electroshock treatment. Then he made a simple sound transmission system. In 1860, the 52-year-old Meucci demonstrated this system to the public and An introduction to the invention was published in an Italian-language newspaper in New York, when his rival Alexander Bell was only 13 years old. Because he was too poor to pay the patent maintenance fee, he sent the model and technical details to the Western Union Telegraph Company in the hope of commercial use, but nothing happened.

On February 14, 1876, Bell, who shared a laboratory with Meucci, applied for a telephone patent to the U.S. Patent Office, and the application was approved on March 3.

However, whether Bell independently invented the telephone, improved the sound transmission equipment, plagiarized Meucci, or used different principles, please stay calm. When science and technology develop to a certain level, the same creation and creativity It occurs in many places, which is very common.

Telegraph lines were originally used to transmit telephone signals, but the noise interference caused by such lines was very large, so people were not allowed to improve the communication lines. In 1883, a line using a second wire as a loop appeared, which greatly reduced the noise interference in telephone communications.


2. The origin of the name “telephone”

In 1796, Hughes proposed a method of using a microphone to relay voice messages. Although this method was not very practical, he gave this method of communication a name: Telephone, which is still used today.

The Chinese word “telephone” is a Chinese word created by Japan. In fact, there are many Chinese names translated in Japan. In addition to telephone, the most famous one is the philosophical term “metaphysics”. Telephone is the free translation of the English word “telephone”. The Chinese transliterated this English word and translated it as “telephone”.

In the early 20th century, a group of foreign students from Shaoxing in Japan jointly wrote a reply to their hometown, which introduced the modernization situation in Japan in detail. Lu Xun was also listed among them. When the letter mentioned “telephone”, he specifically explained: “With electrical appliances, To convey words, the Chinese translated it as “telephone”, which is not as good as “telephone”. Gradually, it was called telephone. For a period of time, the two terms “telephone” and “telephone” were commonly used. Later, “telephone” “Wind” slowly disappears.

3. Chinese people came into contact with telephones for the first time

In 1876 (the second year of Guangxu), Ningbo customs official Li Gui was ordered to go to the United States to participate in the “World’s Fair” held in Philadelphia. He saw a telephone that could transmit messages, and wrote it in his book “A New Record of Traveling Around the World”. In the book, Li Gui is the first Chinese to see a telephone for which historical data are available.

In this book, he also made detailed records of the U.S. Postal Service and suggested that the Qing Dynasty also open a Chinese postal service. His insights were praised by Li Hongzhang, and he was subsequently ordered to draft the “Translation and Drafting of the Postal Service’s Rules for Sending Letters”, which included ten The specifications, features, rates, etc. of several types of mail are specified in detail. When Kang Youwei was 22 years old, he read the newly published “New Records of Around the Earth”.

In 1877, the year after Bell invented the telephone, a Chinese was fortunate enough to use a telephone. This Chinese was named Guo Songtao, who was the first minister of the Qing Dynasty to Britain.

On October 16, 1877, Guo Songtao was invited to visit a power plant near London, England. During the visit, the owner specifically asked him to experience the telephone, which had recently been introduced to the United Kingdom from the United States. One end of the telephone was installed upstairs and the other end was installed downstairs. , Guo Songtao asked Zhang Deyi, the translator of the Chinese Embassy, to go downstairs to answer the call, while he made the call upstairs.

Guo: “Did you hear that?”

Zhang: “Yes.”

Guo: “Are you aware?”

Zhang: “Yes”

Guo: “Please count the numbers.”

Zhang: “One, two, three, four, five, six, seven”

This was the first time for Chinese people to use the telephone. Guo Songtao wrote down his experience of using the telephone in his diary: “There are many languages and there are many that cannot be understood, but this number is distinct.” He called it a “sound reporting machine”. Guo Songtao will What he saw along the way was recorded in his diary “Shi Xi Ji Cheng”, advocating that China should study and learn from the advanced technologies and systems of the West. After the book was sent to the Prime Minister’s Office, it was attacked and cursed by diehards. It was not made public until Guo Songtao’s death. issued.

As the professional OEM fixed telephone manufacturer, Shenzhen EAST LINE can supply lots of different kinds of corded landline telephones for home, office, hotel and public places.

Basic Trimline Corded Phone Hotel Telephone

3. Magnet Telephone

Bell’s phone is a magnet phone. The so-called magnet phone is also called a hand-crank phone or a crank phone. There is a crank on the left side of the phone. Before using the phone, you need to crank it to charge the battery. The general working principle is: When the speaker picks up the phone and speaks into the microphone, the vibration of the vocal cords forms sound waves, which act on the microphone, causing the carbon particles in the metal box of the microphone to become loose and tight – the resistance becomes large and small – circuit The current is strong and weak. , the voice current is transmitted along the line to the receiver of the other party’s phone. The magnetism of the electromagnet in the receiver becomes stronger and weaker – the magnetic force on the thin iron sheet becomes stronger and smaller – causing the thin iron sheet to vibrate and emit sounds that are connected to the speaker. Same sound.

Categories: Company News, Industrial News

During this cold winter, we (Shenzhen East Line Communication Tech Co., Ltd.) have to thank you for your hard work and kind cooperation in 2023, to all our customers, partners and suppliers.

Merry Christmas and Happy New Year to you and your family.

2023 telecom industry outlook

Five key trends shaping the telecom landscape

In the year ahead, telecommunications companies will be focused on delivering advanced connectivity and higher performance to customers while reinforcing value and competitiveness. Our 2023 outlook examines five trends shaping telecom industry growth and business strategy, from 5G monetization to edge computing to an increasing focus on sustainability.

Preparing for a strong, resilient future

Telecom industry growth continues to be driven by the continued importance of connectivity, bringing both opportunities and challenges for communications service providers (CSPs). This year’s telecom outlook explores how CSPs are delivering value to consumer and enterprise customers with bundled services and connectivity options like 5G fixed wireless access (FWA) and fiber, as well as their role in meeting the growing demand for edge computing. We’ll also consider how CSPs may want to balance pricing decisions with the need to accelerate deployment of infrastructure like fiber networks, while attending to the growing urgency to reduce resources, waste, and emissions from network operations, upgrades, and deployments. As connectivity works its way into more of the world, it may be more imperative than ever to balance costs with the needs of households, businesses, communities, and the environment.

Some of the specific themes we see playing a critical role in 2023 and beyond include the following:

  • The bundle battle: Add more value for cost-conscious consumers. For individuals and families, connectivity is important. Yet, consumers often have cost constraints that can limit their options or drive them to seek the best service at the lowest price. To offer more value to consumers, many CSPs are bundling mobile and home internet access, offering connectivity options like fiber and 5G FWA, and partnering with entertainment services to include subsidized or free subscriptions.
  • Fixed wireless access surges, but will it endure? As part of this “bundle battle,” 5G FWA has enjoyed substantial growth. This type of connectivity can provide strong reliability, but some questions remain about how much it can scale. As more people use 5G services, and if more bandwidth-intensive “killer apps” emerge, the limits of 5G FWA could be exposed. However, market dynamics and next-gen technology solutions could overcome these challenges.
  • What enterprises want from 5G edge. For enterprise customers, the need to cut costs, automate capabilities, and support innovation is driving interest and adoption of edge computing. CSPs will likely need partners to develop and deploy edge solutions, requiring more cooperation with erstwhile competitors.
  • Joint ventures accelerate deployment of fiber networks. Many of the connectivity solutions we cover rely on fiber networks. With high demand, strong competition, and the need to optimize costs and risk, more CSPs are partnering with private investors to accelerate deployment of fiber networks.
  • Increase the focus on sustainability. In doing so, these partnerships can support existing customers while extending further into underserved communities, helping to narrow the digital divide—the gap between those who have access to modern information and communication technologies and those who don’t. This aspect tugs at the broader economic imperative of connectivity: more bandwidth, more equally distributed, enabling greater access to education and opportunity.

Shenzhen East Line are always working hard to supply you the best telecom devices with high quality, new technology and advanced features.
2023 year will pass soon, but we are ready to be work together with you in 2024 new year.

Categories: Industrial News

Types and functions of telephone sets


Abstract: Introduction to Telephone Knowledge-Classification of Features: It mainly describes that telephones are mainly divided into ordinary telephones, telephones with memory function, semi-hands-free telephones, full hands-free telephones, telephones with long-distance lock, VOIP telephones, etc., and Describe its functions in detail.


Types and functions of telephone sets

As the manufacturer of the most widely used and largest number of telecommunication terminal equipment on the communication network, Shenzhen East Line has become an indispensable part of people’s life and work. The telephone industry grew from small to large, and reached its heyday around 1996, when there were about 400 telephone manufacturers. Due to intensified competition, some small companies have difficulty gaining a foothold, gradually closing down or changing jobs. In recent years, the number of telephone manufacturers has shown a downward trend. At present, there are nearly 200 manufacturers entering the domestic market. With the development of technology and the continuous development of new businesses The variety of telephones is constantly updated, and the functions are becoming more and more abundant. So far, there are more than 400 varieties and styles of telephone products on the market, and the annual sales volume of telephones in China is about 40 million. In recent years, the overall quality of telephone sets has been steadily improving. However, due to the oversupply in the market, fierce competition, and lack of orderly management, individual manufacturers have chosen low-priced components, simplified design and production processes, and relaxed control over the cost in order to reduce costs. Strict quality requirements have reduced the quality of some telephones.

Telephone products can be divided into common button telephones, calling number display telephones, recording telephones, hands-free telephones, SMS telephones, cordless telephones, etc. according to their functions. The functions of the telephone set are distinguished by their models, and users can purchase them in the market according to their own requirements and hobbies. There are two ways of issuing numbers on the telephone, that is, the pulse issuing method and the dual tone issuing method, which are designed to cooperate with the corresponding switchboard. In order to take into account the two systems, pulse and audio compatible telephones are very common, which can be selected by a switch, represented by P/TOPULSE/TONE.

Different telephones have different functions, and consumers can choose what they need.


The following is an introduction to the types and functions of the telephones of Shenzhen East Line Communication Technology Co., Ltd.:

Corded Analog phone

Telephone without additional features, such as ECG-500

Caller ID telephone with memory keys

A telephone with the function of storing multiple numbers in advance, such as ECG-521/TS, where “S” means that it has the storage function ISTORE.


Caller ID corded phone with speakerphone

The phone has the function of dialing without picking up the handle and can hear the signal tone and the other party’s speech. If you want to talk, you must pick up the handle. Such as ECG-528/TSd, where “d” means a semi-hands-free phone.


Caller ID analog phone with full duplex speakerphone

A phone with the functions of dialing, speaking and listening without picking up the handle. Since the current technology adopts the half-duplex system, it often feels uncomfortable in the hands-free state. This is because the transmission is one-way, that is, you cannot speak when you listen, and you cannot listen when you speak. One party cannot hear. Such as type ECG-517, one of the hottest products in the market。

Big button Phone with toll lock

A phone with the function of restricting long-distance calls, such as ECG-314 /TL, where “L” means that it has the long-distance locking function LOCK.

Enterprise SIP Business Phone

ECG-IP503 telephone equipment adopts Spreadtrum 4G LTE five-mode communication module, supports VOLTE high-definition voice calls, the equipment adopts 2.4 240×320 resolution, supports 2.4G WIFI connection, suitable for mobile office occasions.

It has excellent hardware echo suppression and noise reduction effects; supports the standard SIP2.0 protocol, and is compatible with mainstream softswitches, IMS and IPPBX systems on the market, as well as various SIP protocol audio and video terminals.


SIM card cordless desktop fixed wireless phone

SIM Based Cordless Phone GSM FWP Desk Phone Dual SIM. Model: ECG-942 Features: Support GSM standard: GSM900MHz/DCS1800MHz & GSM850MHz/PCS1900MHz.Support high-quality voice service (FR, EFR, HR voice coding), support emergency call, support caller ID, call transfer, call waiting, call hold and other supplementary services, SMS service and multi-language, phone book, support DTMF secondary dialing .



DECT cordless phone

There is no connection between the handle of the cordless phone and the main unit of the phone. The signal transmission from the main unit to the mobile phone is transmitted through wireless signals. Therefore, the phone can be used within a certain range from the main unit while holding the mobile phone. Such as ECG-D02W /T, where “W” means a cordless phone, ECG-D02P /T means a digital cordless phone. Calling number display telephone This kind of telephone can display the calling user’s number before the user picks up the phone, but the user must apply for this service at the telephone exchange in advance.

Shenzhen East Line Communication Tech Co., Ltd. is the China most professional OEM wired and wireless phone manufacturer.

Our Products include landline wired phones, sim card GSM 3G 4g Volte fixed wireless phone, VoIP IP phone SIP business telephone and DECT cordless phone etc. For more information, please visit: or contact us: [email protected]