APC vs UPC?

[Lorell Hathcock <lorell () hathcock org>]

NANOGians:

APC wins!

My real question is surrounding the connection on the SFPs themselves. 

In general terms are the LC connectors on SFPs considered UPC or APC?

If the answer is UPC and if I am inheriting and/or building a network of single mode fiber with APC SC connectors, then 
is the best practice to use LC UPC to SC APC fiber jumpers?

If so, can anyone point me to a source for said jumpers that is (1) quick and (2) good?

Any thoughts on the same idea of mismatched fiber jumpers connector types to use on OLMs and OLSs?  OTDRs?  The concern 
here is to use the best possible fiber connector types (e.g. APC or UPC) when connecting lasers to my OSP fiber which 
uses APC with consideration to the optimal connector type for the laser transceiver. 

My thoughts are to use fiber jumpers with UPC connectors on the laser side with APC on and throughout the OSP, but if 
it should be purely APC everywhere, then that is what I need to know. 

Thanks!

Lorell Hathcock