tailieunhanh - On Data Throughput in Structured Cabling Systems

Cabling infrastructure providers are following KRONE’s lead regarding the importance of having the lowest bit error rate possible. This white paper confirms that zero bit error rate is a practical reality that Network managers can rely on. More and more network managers are demanding that their networks operate to their maximum potential, rather than merely operate as a standardscompliant solution. Downtime or a slowdown in network performance can be crippling to an organisation in today’s global e-commerce environment. The network cabling infrastructure must be able to support an enterprise’s increasing rates of data transmission now and in the future | Ill KRONE WHITE PAPER ZERO BIT ERROR RATE On Data Throughput in Structured Cabling Systems Released by KRONE Australia Asia Pacific Test Laboratory Certified by Underwriters Laboratories February 2001 ZERO BIT ERROR RATE Cabling infrastructure providers are following KRONE S lead regarding the importance of having the lowest bit error rate possible. This white paper confirms that zero bit error rate is a practical reality that Network managers can rely on. More and more network managers are demanding that their networks operate to their maximum potential rather than merely operate as a standards-compliant solution. Downtime or a slowdown in network performance can be crippling to an organisation in today s global e-commerce environment. The network cabling infrastructure must be able to support an enterprise s increasing rates of data transmission now and in the future. It s imperative that mission-critical information which is transmitted in packages of bits is delivered immediately without costly delays. Bit Error Rate BER testing is one way of measuring a network s performance - of seeing how quickly and efficiently information is delivered from sender to receiver. Zero Bit Error Rate ZBER has been the goal that now is a practical reality thanks to KRONE s TrueNet solution. However controversy reigns in the cabling industry today disputing the ability to actually measure an absolute zero. Amid claims that ZBER is no more than a new buzz-acronym and therefore cannot be achieved this White Paper outlines KRONE s methodology of testing for achieving and indeed guaranteeing Zero Bit Error Rate. WHAT THE STANDARDS SAY The IEEE Standard defines the lowest acceptable value for Bit Error Rate BER for 1000 Base-T as being 10 10. This BER limit is set for levels of line encoding using pulse amplitude modulation PAM-5 . This is the encoding scheme for Gigabit Ethernet. WHAT IS BER A bit error occurs when the transmitted signal is corrupted by an event which changes .