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[EFM] Cable plant question


This is a question aimed at service providers and those who believe
they understand the implementation practices of service providers.

Based on a couple of recent email threads on the P2P reflector, I
think it would be due diligence if I expose this topic on the main
EFM reflector. Let's keep it at a top level here. Also, the question
relates to P2P links only, not P2MP links.

Suppose the Optical PMD group came to you and asked: We are
examining the merits and demerits of a particular type of PMD. It
requires that the cable plant return loss be high, say, more than 21
dB. It means the fiber at both ends of the link will be have to be
terminated with APC connectors. In addition, you will have to
guarantee that ALL fiber joints, end to end, in your EFM cable plant
will have to be either splices or APC-to-APC connector joints. This
goes for any patch panels (fiber distribution boxes) you may have,
either at the CO end, or at the subscriber end. If they have been in
place before you deploy EFM links, you will have to search and
replace all PC/UPC connectors with APC.

Without entering the PMD debate (which is best done on the P2P
reflector), please tell me: do you find such a cable plant
proposition undesirable or acceptable? Very expensive or marginally
more expensive?

I recognize that the final decision on a PMD would depend on many
other factors, like the cost comparison of PMD options and its
system level implications. With all those caveats in place, I am
asking your opinion exclusively on the cable plant question.

Thank you in advance.