Randy,
is adding new 'terminations' not a bit more of a bother?
Less so if when you put the DWDM unit in, you pre-install OC-X cards and pre-fiber them to your DWDM unit (may be some on OC-3, some on OC-12). Yours has less visits till you fill your OC-48, then a big wait :-) Either strategy (DACS/optical cross connect) is superior to private interconnect. And either strategy allows for economical distribution of the exchange poit across the metro area (i.e. you take the loop to your own prem or favourite colo house). And either can take a connection made resilient beneath layer 2. And either is compatible with a 'multi-IXP-operator' model. All major wins if you are worried about running out of space or your IXP operator's quality going down the toilet. -- Alex Bligh VP Core Network, Concentric Network Corporation (formerly GX Networks, Xara Networks)