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Re: PAM-5, what are your BERs ?

100BASE-T4 specifies a ternary symbol error rate of less than one
part in 10^8.

My recollection is that we didn't feel compelled to do any better than
10BASE-T, which has a BER objective of less than one part in 10^8.

I also recall that the BER objective for FDDI-TPPMD and 100BASE-TX is
2.5 x 10^-10.  We had the same BER objectives on fiber and copper.

Gigabit Ethernet specified 10^-12 because that's what Fibre Channel

Howard Frazier
Cisco Systems, Inc.