•pulse broadening detects single error by latching the set-up to level 1, •pulses of less 1ns can be transmitted and will be detected, •cascading 7 links permits to speed up BER measurement time by a factor of 7, •severe working conditions are generated by injecting a 1Gb/s signal on remaining chan-nel, causing max. probability for crosstalk, •no error was detected after 72 hours, giving an estimated BER of:  1 / (72 * 3600 * 10^9 * 7) •BER for Hitachi POLC better than:  5.10E-15, this @ 25C.

Hitachi POL  BER : a basic estimation