Palo Alto, CA--June 17, 1996--A line of network timingand synchronization products has been announced by Hewlett-Packard Co. (Palo Alto, CA). They include the HP 55300Aprimary reference source, the HP 55400A network-synchronizationunit, and the HP 58000 Series custom-timing module. Theseproducts and services enhance the reliability and accuracy oftoday's high-speed digital communication networks. They helpeliminate many of the problems associated with transmitting dataor images over telephone lines, such as dropped fax lines andmodem disconnects, and the problems stemming from handing off thecellular calls from one base station to another, which also canresult in dropped calls.
With these products, HP provides what it believes are first-to-market solutions designed specifically for today's digitalcommunication networks. In addition to providing compacthardware and software systems that are easy to upgrade andrequire little maintenance, the company provides networkconsulting services to help customers design and operatewell-timed networks, and troubleshoots networks withsynchronization problems.
These products are the industry's first network-timing products to add intelligence to Global Positioning System time-reference signalsand the oscillator backup clock. The result is a new, affordablestrategy for network timing, called HP SmartClock technology, inwhich very accurate, cesium-quality GPS timing modules are placedat every network node or hub office. The technology achievesnear-cesium quality at one-tenth the cost of cesium andnear-rubidium quality at one-third its cost. (Since the 1960s,cesium and rubidium have been used as elements in atomic clocksto synchronize time. Cesium is the basis of the world's mostaccurate atomic clocks, while the metallic element rubidium costsless but also is far less precise.)
When locked to a reference signal, HP SmartClock technologycompares the frequency of the unit's oscillator to the referencesignal and uses this information to adjust the oscillator'sfrequency to match the reference signal. In addition, a node'stiming system is automatically switched to intelligent holdovermode if the reference signal is lost, and evaluates GPSinformation to eliminate incorrect signal data. The combinationof GPS and HP SmartClock-based products provide carriers with theaccurate timing needed to successfully deploy on a large scalethe ISDN, video and other broadband data services that are indemand by consumers.
Trilby Steiger or John McCreadie
Direct Marketing Organization
P.O.Box 58059, MS51L-SJ
Santa Clara, CA 95051-8059
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