From my own experience in my $DAYJOB, separating capital decisions at the L1 and L2 layers would end up adding cost. As mentioned elsewhere, GPON and similar shared medium approaches do not lend themselves well to structural separation. The most practical approach is dark fiber runs from the customer to as few centralized places as possible. The CLEC would co-locate their equipment at those centralized places. The CLEC is then free to use ActiveE, GPON, whatever-the-next-gen-of-PON.
Structural separation works best when the cost to build to a customer are roughly the same. Wherever there's significant disparaties, those will be exploited and people will overbuild to the highest-margin/lowest cost customers to avoid the averaged cost of L1 network. Frank -----Original Message----- From: Owen DeLong [mailto:owen@delong.com] Sent: Friday, March 23, 2012 9:28 AM To: Masataka Ohta Cc: nanog@nanog.org Subject: Re: Muni Fiber (was: Re: last mile, regulatory incentives, etc) <snip> It doesn't promote local monopoly if you don't allow the L1 company to provide L2+ services. If the L1 company is required to be independent of and treat all L2+ services companies equally, then, the ILEC, CLEC, et. all have the same cost per customer. Owen