With the bandwidth and performance demands on Ethernet networks increasing daily, BERT has become essential for quantifying bit error rate in optical fiber communication channels and establishing confidence in high speed service. With the bandwidth and performance demands on Ethernet networks increasing daily, BERT has become essential for quantifying bit error rate in optical fiber communication channels and establishing confidence in high speed service activation. The importance of BERT encompasses both internal and external customers.Bit Error Rate (BER) is a measure of telecommunication signal integrity based on the quantity or percentage of transmitted bits that are received incorrectly. Essentially, the more incorrect bits, the greater the impact on signal quality. Bit error rate is an effective indicator of full end-to-end performance because it encompasses the receiver and. The bit error rate is calculated by dividing the quantity of bits received in error by the total number of bits transmitted within the same time period. A result of 10-9 is generally considered an acceptable bit error rate for telecommunications, while 10-13 is a more appropriate minimum BER for data transmission. If enough confidence in the rate i. Several BERT test for Ethernet and service activation methods have been developed, each with inherent advantages and limitations. While some test processes are well suited for specific applications, others provide a more general assessment of the network link QoS.The development of BERT test tools and equipment has mirrored the progression of the test process from the lab setting through manufacturing and into the field. The diverse VIAVI bit error rate test equipment offerings support this unbroken chain with industry leading lab, handheld and rack-mounted testing equipment. In the lab, engineers and scien.