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The History of Wired Communication

A Driving Force in the Age of High-Speed Global ConnectionSoNET/SDH measuring instruments aid in the globalization of high-speed digital communication

The age of global data communication begins

The main fiber optic network across Japan was completed when a shift to digital systems was beginning among information and communications systems. It was the dawn of an age where audio, video and data could all be handled on the same network. But at that time, different countries had different specifications for digital networks, posing a barrier to international communication.
The International Telecommunication Union Telecommunication Standardization Sector (ITU-TS) therefore announced SoNET/SDH in 1988 as an international standard for high-speed digital communication methods. Fiber optic networks also began to be combined with digital networks, setting the stage for smooth global data communication that crossed boundaries between nations, regions and operators.

  • (White Paper: Information and Communications in Japan 1998, Ministry of Internal Affairs and Communications)(White Paper: Information and Communications in Japan 1998, Ministry of Internal Affairs and Communications)

Foreseeing the future and becoming the leading measuring instrument company for digital communication

As Anritsu worked to develop SoNET/SDH compliant measuring instruments, our focus was on being one step ahead. At the dawn of the digital communication age, data was transferred at speeds of 156Mbps or 622Mbps, but Anritsu was sure that it would not be long before data was transferred in gigabits per second (Gbps) and we sold the world’s first 2.5G measuring instrument to NTT in 1989. The instrument was made entirely from parts and devices developed in-house, and opened the door for high-speed digital communication.
Anritsu then refined its instrument to comply with international standards. In 1991 we developed the MP1560A, which made it possible to measure according to both the STM standard in Japan and the SoNET standard in the US using the same instrument.
After this, Anritsu focused on providing total solutions for development, production and maintenance. In 1995, we developed the MP1550A, the world’s smallest maintenance measuring instrument at the time. This was followed by the MP1552B and MP1555B in 1998. These instruments were compatible with both European and American networks, and made Anritsu the leading measuring instrument company for digital communication.

  • SoNET/STM analyzer MP1560ASoNET/STM analyzer MP1560A
  • PDH/SDH/ATM analyzer MP1552BPDH/SDH/ATM analyzer MP1552B

Bringing the world the measuring instruments it needed at the turn of the millennium

SoNET/SDH/PDH/ATM analyzer MP1570ASoNET/SDH/PDH/ATM analyzer MP1570A

In the late 1990s, internet usage accelerated and data traffic grew and grew. Operators worked to expand their networks and transfer speeds increased dramatically. Anritsu was the first to respond to this by developing the MP1570A. The MP1570A made it possible to support all of the major international standards for digital communication at that time – SoNET/SDH, PDH and ATM – with one portable-sized device. It also tested a wide range of speeds from 1.5Mbps to 10Gbps. With transfer speeds increasing, this instrument was exactly what the market needed. This, along with its ease of use and high performance, saw the MP1570A adopted by operators around the world, and it was thus instrumental in the building of a global high-speed digital communication network.

Anritsu’s proposal becomes a global standard

Anritsu has worked actively with the International Telecommunication Union Telecommunication Standardization Sector (ITU-T), a department that works to promote global standardization of various specifications, since the 1990s. In 2000, we headed a group in charge of measurement technology in the Committee for Management, Maintenance and Research of Communication Networks. A proposal we submitted based on 10G jitter measurement technology we had developed as basic technology in 1999 was adopted for O.172, the global standard for jitter/wander measuring instruments announced by ITU-T. We also proposed a generation method and verification method for wander test signals in 2005 that was adopted for O.172 (revision ’05). Anritsu’s close involvement in the creation of global standards and contribution to standardization are yet more examples of our presence as a driving force in the globalization of fiber optic-based digital communication.

From analog to digital

Digital communication in Japan dates back to 1962. At that time, PCM was used as the communication standard. Anritsu worked in partnership with Nippon Telegraph and Telephone Public Corporation (NTT Public), developing measuring instruments that aided in the development of digital communication technology for practical use and thereby playing a key role in the switch from analog to digital.

Measuring instrument for PCMMeasuring instrument for PCM

The Communication Olympics

ITU Telecom is known as the Olympics of the communications industry. Anritsu has been involved in this exhibition since it was held for the first time in 1971, but it was at the 1999 exhibition that our name made a lasting impression on visitors. At that exhibition, we unveiled the MP1570A, our top-selling device that made it possible to test according to all of the major international standards for digital communication with one device. The instrument became an instant hit at its appearance at ITU Telecom, with some visitors placing orders on the spot, eventually setting a new sales record for Anritsu’s measuring instruments.

Telecom World 1999Telecom World 1999

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