China Telecom Group Co., Ltd. is a super-large state-owned communication enterprise established according to the national telecom system reform plan. Is the largest basic network operator in China, with the largest fixed telephone network in the world, covering urban and rural areas throughout the country and reaching all parts of the world. Its members include 365,438+0 provincial-level enterprises all over the country, which are engaged in telecommunications business nationwide.
China Telecom Group Co., Ltd., managed by the central government, is an authorized investment institution in the State Council and a pilot project of state holding company. The registered capital is 654.38+58 million yuan. Mainly engaged in domestic and international fixed telecommunications network facilities, including local wireless loops; Voice, data, image and multimedia communication and information service based on telecommunication network; Carry out external settlement of international telecommunication business and open up overseas communication market; Operating system integration, technology development, technical services, information consultation, advertising, publishing, equipment production and sales, import and export, design and construction related to communication and information services; And operate other businesses approved or allowed by the state according to the needs of market development.
2. Netcom
China Network Communication Group Corporation (hereinafter referred to as China Netcom) is a super-large telecommunications enterprise in China and a fixed communication service partner of Beijing 2008 Olympic Games.
The predecessor of China Netcom has a long history of 100 years. 16 in may 2002, according to the State Council's "telecom system reform plan", China netcom was established on the basis of the former China telecom group company and its northern 10 provinces (autonomous regions and municipalities) telecom company, China network communication (holding) co., ltd. and jitong communication co., ltd. in June 2004, China netcom was successfully listed in new york and hongkong.
China Netcom is a state-authorized investment institution and a state-controlled pilot unit approved by the State Council. It is directly managed by the central government and listed separately in the national finance and related plans. China Netcom has a registered capital of 60 billion yuan and total assets of nearly 300 billion yuan.
China Netcom has a modern communication network covering the whole country, reaching the world, with reasonable structure, advanced technology and complete functions, mainly engaged in domestic and international fixed telecommunications network facilities and related telecommunications services. By the end of 2005, the total number of users of China Netcom has reached 654.38+350 million.
At present, China Netcom is committed to the development of broadband communication, promoting various business or service brands represented by "Broadband Service", "CNCMAX Broadband My World", "Golden Club" and "10060", and gradually promoting the strategic transformation of enterprises through the implementation of three strategies of broadband, Olympic Games and internationalization, with a view to becoming comprehensive services.
China Netcom Group's interpretation of its corporate image.
The corporate logo of China Netcom Group (hereinafter referred to as "Netcom Group") consists of two parts, which have distinct characteristics of the times and industries. The two interactive English letters "C" in logo form a virtual "N", which is not only the abbreviation of China Netcom Group for China Netcom in English, but also the freehand form of the Chinese word "Net", which vividly transforms the characteristics of communication and interaction in the telecommunications industry into a visual image. Its circular outline symbolizes the globalization trend of China Netcom's delegation in China, and the ingenious combination of blue background and green letters contains profound implications of science and technology and the future. Chinese fonts, with proper inclination angle, effectively convey the enterprising spirit of enterprises.
The logo has a unique artistic aesthetic feeling and symbolic significance, and it is a vital organic whole. It has integrated the original logos features of China Telecom North 10 province (autonomous regions and municipalities), China Network Communication (Holding) Co., Ltd. and Jitong Communication Co., Ltd., vividly outlined the inherent quality of integrating all positive factors and excellent resources of China Netcom Group, and embodied that China Netcom Group, as a super-large state-owned telecom enterprise, led all employees to work together with Qi Xin. "
3. Tietong
China Tietong Group Co., Ltd., formerly known as Railway Communication Information Co., Ltd., was established on February 26th, 2000 and approved by the State Council on October 20th, 2004. As a wholly state-owned company directly under the central government, it was placed under the management of the State-owned Assets Supervision and Administration Commission by the Ministry of Railways and renamed as "China Tietong Group Co., Ltd." (hereinafter referred to as "China Tietong"), which is a large state-owned basic telecom operator.
China Tietong has the advantage of "one national network", and basically completed the construction of basic communication networks such as long-distance transmission network, switching network, data network, metropolitan area network, railway communication and interconnection, and built a complete, unified and advanced communication network covering major domestic economic regions. The company has nearly 300 local networks covering 365,438+0 provinces, municipalities and autonomous regions in China. Communication lines are 6,543.8+0.5 million kilometers, local telephone exchanges are 6,543.8+0.8 million lines, and data service ports are nearly 300,000, realizing interconnection with domestic telecom operators. The company opened a unified customer service platform of 10050, and the service quality reached the ministerial standard issued by the Ministry of Information Industry. It has established a national settlement center, a provincial settlement center and a national customer service system. It is the first operating enterprise in China that can provide users with detailed local telephone charges.
CRNET is a nationwide high-speed broadband IP network with unified management and centralized scheduling, which can provide voice, image, fax and data, MPLS VPN and other services. The switching capacity of the network core reaches 320G, the backbone relay bandwidth is 10G, and it has 10G, 2.5G, GE, POS622, POS 155, ATM10/1. Internet services cover nearly 300 local networks.
Step 4: Move
China Mobile Communications Group Corporation (hereinafter referred to as "China Mobile Communications") is an important state-owned backbone enterprise established on April 20, 2000 on the basis of the overall divestiture of the original mobile communications assets of China Telecom in accordance with the deployment and requirements of the state on the reform of the telecommunications system, and is directly managed by the central government. China Mobile Communication Co., Ltd. is the only communication operation company in China that focuses on the development of mobile communication. It has been playing a leading role in the development of mobile communication in China and occupies an important position in the international mobile communication field. After more than ten years of construction and development, China Mobile Communication has built a comprehensive communication network with wide coverage, high communication quality, rich business varieties and first-class service level. The network scale and customer scale rank first in the world. By the end of 2002, the network has covered the vast majority of counties (cities) in China, with continuous coverage of major urban traffic trunk lines and indoor coverage of key areas. The exchange capacity of GSM mobile phones reaches 654.38+82 million, and the total number of customers exceeds 654.38+38 million. It has opened international roaming with nearly 200 mobile communication operators in 654.38+065.438+06 countries and regions. At present, China Mobile (HK) Co., Ltd. is one of the largest listed companies in China.
5. Small airport radio communication system
Main business: Telecom services include mobile phones (including GSM and CDMA), long-distance calls, local calls, data communications (including Internet services and IP phones), telecom value-added services, wireless paging and other services related to the main business.
Business scale: China Unicom has set up more than 300 branches and subsidiaries in 30 provinces, autonomous regions and municipalities directly under the Central Government. China Unicom is the only telecom operator listed in new york, Hongkong and Shanghai at the same time.
China United Communications Co., Ltd. was established in July 1994. The establishment of China Unicom has introduced competition in the field of basic telecommunications services in China, which has played a positive role in promoting the reform and development of China's telecommunications industry.
China Unicom has established more than 300 branches and subsidiaries in 30 provinces, autonomous regions and municipalities directly under the Central Government. China Unicom is the only telecom operator listed in new york, Hongkong and Shanghai at the same time. In June 2000, the company successfully went public in Hongkong and new york, raising 5.65 billion US dollars, ranking among the top ten in the history of initial public offering in the world. On June 5438+ 10, 2002, the company successfully completed the A-share listing in Shanghai and became the largest listed company in the domestic capital market.
China Unicom insists on market-oriented, efficiency-centered, unified planning of network construction, rational use of network resources, focusing on maintaining sustained, healthy and rapid development with the help of social forces, and striving to provide comprehensive, convenient and distinctive telecommunications services for the society.
Since its establishment, the overall strength of China Unicom has been continuously enhanced. Telecom business has developed from mobile phone (GSM) and wireless paging to mobile phone (including GSM and CDMA), long-distance telephone, local telephone, data communication (including Internet service and IP telephone), telecom value-added service, wireless paging and other services related to the main business.
Looking ahead, China Unicom will merge; Mobile-oriented and comprehensive development; Coordination and differential operation between two networks; Benefit leading, bigger and stronger; Strategic development ideas, continue to promote the innovation and in-depth development of various human resource management systems, and build the company into a communication market in China; Even, each with its own characteristics; The main body of market competition, among the world-class telecom operators!
6. Public Health Service
One: What is PHS?
PHS is the so-called "wireless local telephone"-PAS is a new personal wireless access system. It uses advanced wireless cellular technology to connect to the fixed telephone network in a wireless way, so that the fixed telephone can perform the functions of the fixed telephone in a wireless state under the wireless network. It is a useful supplement to the fixed telephone.
Second, the origin and development of "wireless local telephone" in China.
The wireless local telephone in China is called "PHS". Is 1996 Xu Fuxin, director of Zhejiang yuhang telecommunications bureau, skillfully connected PHS (both personal access telephone system and Japanese personal mobile telephone system). The system was officially put into use in Japan on 1995. ) and the program-controlled switching technology of fixed telephone (that is, the program-controlled switching equipment of fixed telephone is still used for data exchange, and wireless technology is only used for wireless local telephone access), and the wireless local telephone PAS technology suitable for China's national conditions has been successfully developed and put into practical application in 1998.
Three: Advantages of PHS
1: Because PHS adopts advanced ADPCM decoding method, the call quality is close to that of fixed telephone.
2. Because PHS is based on PHS technology, the transmission power is very small (even smaller than CDMA), and it will not produce adverse reactions after long-term use.
3. Due to the extremely low transmission power, the standby time of PHS mobile phones using lithium batteries is generally long (in general, they can be used continuously for 4-5 days. )。
This is the most attractive reason of PHS telephone-low telephone charge. PHS uses fixed program-controlled switching equipment in the telephone program-controlled switching part and only uses wireless technology in the mobile terminal part, which reduces the cost of PHS per line from about 750 dollars per line to less than 1000 yuan per line. Because of the low cost of operating and building the base station, the cost of this kind of mobile phone equipment is very low, which can be said to be close to the local telephone standard.
5. PHS can upgrade to 3G WCDMA and TD-SCDMA if Netcom or China Southern Telecom may obtain a formal mobile license. By then, PHS will have more data services.
Four: the shortcomings of PHS
The disadvantage of PHS is mainly caused by its transmitting power. Low transmission power has both advantages and disadvantages. Because PHS is based on PHS technology, it also continues its several shortcomings.
1: PHS needs to build a base station every 200 meters. Due to the buildings on the construction site and a series of reasons in the early stage of construction, the construction will not be perfect. Therefore, in the initial stage of network numbering, its network coverage is relatively narrow, and there will be blind spots and blind spots. I think this shortcoming will be overcome through the development and construction of PHS.
2. Because the base stations are built too frequently, the terminal mobile phone you use will switch signals frequently when you move (that is, when you walk or sit in the car). But you have to remember that because the power of PHS is very low, you need to keep the moving speed within 40 km/h when switching. Otherwise, your terminal phone will affect your call because the switching speed cannot keep up with the switching speed of the base station.
3. Because the transmitting power of PHS is very low, the penetration ability of PHS signal is relatively poor. In other words, if you are indoors or near a tall building, your PHS signal will be weak. It doesn't matter. You can call from the window or balcony.
Unfortunately, PAS can only provide calling number display, call transfer, call waiting, three-way call and telephone recording services. I think PHS will provide more data services in the future development process, or upgrade to 3G WCDMA or TD-SCDMA. Because PHS is close to the charging standard of local calls, China Mobile and China Unicom have to issue more cards with cheaper phone charges. Deal with PHS!
PHS is a new personal wireless access system, which uses advanced microcellular technology to wirelessly access the local telephone network, and is an effective supplement and extension of fixed telephone. PHS has good confidentiality, security and reliability, and can be carried freely within the network coverage, making and receiving local calls, mobile phones, domestic and international long-distance calls anytime and anywhere; PHS implements one-way charging, and the charging standard is basically the same as that of fixed telephone, which has many characteristics such as economy, green health, exquisiteness and fashion.
PHS adopts all-digital wireless technology, which has strong confidentiality and cannot be stolen. Using 32K speech coding, it can support voice and data services, with clear voice, comparable to wired telephone, and can also support high-speed data transmission services in the future; The mobile phone is portable, fashionable and powerful, and can support data communication; It uses microcellular technology to connect the client (wireless local telephone) to the local telephone network in a wireless way, so that the traditional fixed telephone is no longer fixed in a certain position, can be used freely within the coverage of the wireless network, and can answer and make local, domestic and international calls anytime and anywhere. The biggest feature is that the phone bill is economical and flexible to use.