Historically, optical interfaces have had lower reliability (MTBF) than electrical interfaces, of the same rate, due to a high burnout rate for the lasers. This has apparently changed now, and optical failure rates are lower. Do customers perceive this as true? Do you know of estimates for MTBF for lasers vs copper, for example, 1Gig ether O versus E? Assume that we're talking VSR usage; otherwise copper wouldn't be suitable. And in terms of all optical interface types, if you want roughly 10Gbps speed but are agnostic about how, what about OC192C POS interfaces versus 10Gig Ether? thanks, -david waitzman
Historically, optical interfaces have had lower reliability (MTBF) than electrical interfaces, of the same rate, due to a high burnout rate for
Thus spake "David Waitzman" <djw@bbn.com> the
lasers. This has apparently changed now, and optical failure rates are lower.
Do customers perceive this as true?
My experience is that product failure is almost exclusively due to design or manufacturing problems, or customer damage (e.g. floods, ESD). The best resource for this data would be your vendors' RMA departments.
And in terms of all optical interface types, if you want roughly 10Gbps speed but are agnostic about how, what about OC192C POS interfaces versus 10Gig Ether?
In theory, both MTBF and price will be lower for the simpler technology, but by the same token that simpler technology may not support all the features you need. It's hard to say what's best if you don't list your criteria. S
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David Waitzman -
Stephen Sprunk