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In networking, "time is money" translates to "speed costs bucks." This lesson will help you calculate your need for speed based on your network's requirements. The dramatic increase in the […]

My last few columns have focused on PC-UNIX connectivity and remote access. I plan to continue this discussion in future columns, but this piece will provide a brief diversion and […]

The propagation of corporate networking has surprised even the most well-prepared IS managers. As the price of 10Base-T hubs and adapters has plummeted, the cost of adding new users to […]

Faster than the average ticker, PC Quote's HyperFeed is double the transmission speed of any competitor. But is there hype behind the vendor's marketing pitch? It was March 31, the […]

First impressions often have strong and lasting impacts. You meet someone new who either puts you on edge or at ease, and the stage may well be set for future […]

The right modem choices can be made only by informed buyers. Buyers comparing modems with similar characteristics can be puzzled by price disparities among what appear to be roughly equivalent […]

The last few columns have focused on the global internet, discussing hardware issues and various options for "getting connected." I also touched on the infrastructure of the Internet. The tentacles […]

ISDN, that perennial example of technology-going-nowhere, has confounded conventional wisdom: Based on this voice-data hermaphrodite, a new family of business applications is ready to enable the downsized, distributed business model. […]

While you wait for your 386 PC to churn out the recalcolation of a 1,200-cell spreadsheet under Windows, you have plenty of time to dream about the fast life: Your […]

Synchronous digital circuit design requires effective clock management in high-speed devices, which in turn requires knowledge and use of the right parts for clock generation, knowledge of high-speed layout methods, and the ability to simulate, analyze and test clock paths. Attention must be paid to feedback techniques, transmission-line characteristics, and other details once thought to be the exclusive domain of analog circuit design. Multiple copies of a clock signal must be generated that have fixed relationships to one another, and the clock copies must be distributed to various points within a board or a complete system without interfering with the relationships. Specialized clock drivers produce copies of clock signals with maximum skew of 0.5 to 1 nanosecond for TTL- and CMOS-compatible outputs; careful use of delay lines can be used in distribution to adjust clock signal characteristics as they travel through the system., You'll need a variety of practical skills and tools to tackle high-speed timing problems--even the best timing device presents no magical solution. Without effective clock management, the benefits of a [...]

The art director of Motocross Mother magazine sits at his workstation, admiring the digitized image of one of the fastest racers in the country. Since the image needs to go […]

The emergence of distributed applications and the availability of cheaper T-1 and fractional T1 are helping to push the interconnection of local networks over the wide area. The most important […]

You cannot send data anywhere in the world, or even within the U.S., and have a guarantee that the message will be carried over a consistent data transport scheme. Today, […]