Draft Document for Review April 7, 2004 6:15 pm

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￿Option 1 - Fiber optic jumper cabling package (available today for z800 and z900).

IBM does the detailed planning. This option includes planning, new cables, installation, and documentation. An analysis of the zSeries channel configuration, I/O devices, and any existing fiber optic cabling is required to determine the appropriate fiber optic cables.

￿Option 2 - Fiber optic jumper cable migration and reuse for a zSeries upgrade (new option).

This option includes planning, reuse of existing cables, and documentation. IBM organizes the existing fiber optic cables based upon the new z990 connection details. Relabeling, rerouting, and reconnection to the appropriate z990 channels is performed. New cables are not offered as a part of this option.

Tip: Additional information is documented in the IBM Redbook: IBM eServer zSeries Connectivity Handbook, SG24-5444.

Summary

Each enterprise fiber cabling services design is unique in that it is based on physical room characteristics and equipment placement preferences. It is a long-term “connectivity solution” that provides an organized network of cabling options for future equipment reconfigurations and additions.

The zSeries fiber cabling services and enterprise fiber cabling services, offered by IBM Networking Services, are designed to help you keep pace and provide you with the optimum reliability, availability, and serviceability, as well as the scalability you need to grow your system(s).

Appendix B. Fiber optic cabling services

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990 specifications

The IBM 990 series, often referred to in the context of IBM's pioneering efforts in the realm of mainframe computing, represents a unique chapter in the history of information technology. Introduced in the late 1960s, the IBM 990 series was designed as a powerful tool for enterprise-level data processing and scientific calculations, showcasing the company's commitment to advancing computing capabilities.

One of the main features of the IBM 990 was its architecture, which was built to support a wide range of applications, from business processing to complex scientific computations. The system employed a 32-bit word length, which was advanced for its time, allowing for more flexible and efficient data handling. CPUs in the IBM 990 series supported multiple instructions per cycle, which contributed significantly to the overall efficiency and processing power of the machines.

The technology behind the IBM 990 was also notable for its use of solid-state technology. This provided a shift away from vacuum tube systems that were prevalent in earlier computing systems, enhancing the reliability and longevity of the hardware. The IBM 990 series utilized core memory, which was faster and more reliable than the magnetic drum memory systems that had been standard up to that point.

Another defining characteristic of the IBM 990 was its extensibility. Organizations could configure the machine to suit their specific needs by adding memory, storage, and peripheral devices as required. This modular approach facilitated the growth of systems alongside the technological and operational demands of the business environments they served.

In terms of software, the IBM 990 series was compatible with a variety of operating systems and programming environments, including FORTRAN and COBOL, enabling users to access a broader array of applications. This versatility was a significant advantage, making the IBM 990 an appealing choice for educational institutions, research facilities, and enterprises alike.

Moreover, the IBM 990 was engineered to support multiprocessing, which allowed multiple processes to run simultaneously, further increasing its effectiveness in tackling complex computing tasks.

In summary, the IBM 990 series represents a significant advancement in computing technology during the late 20th century. With a robust architecture, versatile configuration options, and a focus on solid-state technology, the IBM 990 facilitated substantial improvements in data processing capabilities, making it a cornerstone for many businesses and academic institutions of its time. Its impact can still be seen today in the continued evolution of mainframe computing.
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