ShanDong ZiBo Telecom - part of China Telecom - in the municipality of Zibo, a major industrial centre in ShanDong province in eastern China, is to install 10 Gbit/s optical technology from Marconi to increase the capacity of its networks. The contract is Marconi`s first in China at this capacity.
ShanDong ZiBo Telecom awarded the contract after a highly competitive tender, choosing Marconi ahead of the other leading global players in the provision of core transmission systems. Marconi, the world`s leading supplier of SDH (Synchronous Digital Hierarchy) transmission systems - the technology that lies at the heart of ShanDong ZiBo Telecom`s network - will supply its switching equipment during the first few months of 2001.
Yan Wangang, Deputy Director of Shandong Zibo Telecommunication Bureau, said: "Marconi offers an advanced but also stable product that gives us the capacity we need to expand our telephony and data services. Morever, Marconi has tremendous experience in the international communications industry and we aim to continue this long-term relationship. With the higher-speed system we will continue to benefit from SDH`s inherent advantages, including monitoring and management, reliability and self-healing capabilities."
The new project maintains an existing link between Marconi and ShanDong Zibo Telecom, Marconi having designed and installed 2.5 Gbit/s SDH equipment several years ago. The new infrastructure will increase the capacity of the fibre ring around Zibo, enabling rapid expansion of its 1.4 million telephony subscriber base among the city`s four million population.
Yudan Jin, President Asia-Pacific, Marconi, said: "This contract is particularly significant for Marconi, representing the first stage of evolution towards next-generation networking in China, which continues to have tremendous potential, expanding and upgrading its telecommunications infrastructure at a remarkable pace. It is further recognition of SDH`s continuing strength as the technology on which most of the world`s transmission systems are based, being a proven, standards-based, reliable and manageable transport technology and one in which Marconi excels."
The contract covers the supply of 10 Gbit/s MSH64 SDH switching products and comprehensive system management to upgrade the network. Marconi will also train engineers from ShanDong ZiBo Telecom and support the installed equipment through a service contract.
Marconi plc is a global communications and IT company with around 49,000 employees world-wide and sales in over 100 countries. It supplies advanced communications solutions and the key technologies and services for the internet. Marconi plc is listed on the London Stock Exchange and Nasdaq under the symbol MONI.
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Benefits of SDH:
- Sophisticated network management, including network resilience and protection.
- Reduced capital investment through improved network utilisation. SDH delivers proven, inherent functionality, with less equipment needed - therefore less capital investment - than older, plesiochronous networks.
- Reduced operating costs through less and smaller equipment than older switched networks, with space savings, reduced power requirements and improved network management techniques leading, inevitably, to manpower, upgrade and maintenance savings augmented by advanced functionality, such as remote diagnostics, software downloads and remote configuration.
- Network utilisation through managing the way information is carried, such as effective sorting and packing of data, ensuring the most effective use of the available bandwidth.
- Survivable networks - a key consideration, particularly as high-revenue services become available. Additional revenue can be generated from improved Quality of Service (QoS).
- Interworking between networks: Operators are free to buy SDH equipment from several vendors and can opt for the "best of breed" according to their budget, strategy and time constraints.
- Increased revenues: Probably the most influential factor - and a direct result of implementing the above features. The ability to respond quickly to circuit requests and monitor circuit performance - and so be able to offer a guaranteed QoS - enables the operator to provide premium services, ensure customer satisfaction and differentiate its offerings from those of competitors.
Moreover, there are checks and balances built into SDH, enabling it to optimise the use of the valuable fibre and offering performance monitoring and levels of resilience, such as the SPRING system (Shared Protection RING).
SDH is excellent for multiplexing the relatively narrow bandwidths experienced at the access layers of a carrier network into a series of core transport modules, beginning with STM-1 at 155 Mbit/s, rising to STM-4 (622 Mbit/s), STM-16 (2.4 Gbit/s), STM-64 (10 Gbit/s) and, most recently, STM-256 (40 Gbit/s).
But although there is, in theory, no ceiling to SDH`s capabilities, it has not been designed by any manufacturer to deliver its proven benefits with individual payloads beyond 622 Mbit/s or 2.5 Gbit/s. In contrast, the capacity of individual wavelengths in commercial photonic (Dense Wavelength Division Multiplexing) systems - such as Marconi`s SmartPhotoniX range - begins at 2.5 Gbit/s.
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