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UncleS · 10-15-2002, 02:48 PM

The way I understand it is that while T1, T3 and some OC3 lines are connected to routers as WAN links, the OC12 and up are usually used as long-haul backbone between telcoms. OC3 are usually local loops that dedicated T1 - T3 connect your business to.

So an OC-12 (or Larger) fiber link runs into a metro area. It is then split into OC3 local loops that service differnet areas in the same city. T1 and T3 lines then connect your network to the OC3 local loop as a permanent circuit.

Also the OC lines are fiber anything connected to it and the set up costs are WAY more expensive than dealing with copper.

10-15-2002, 02:48 PM	#9
UncleS Member (8 bit) Join Date: Aug 2002 Location: Mid-Hudson Valley NY USA Posts: 134	The way I understand it is that while T1, T3 and some OC3 lines are connected to routers as WAN links, the OC12 and up are usually used as long-haul backbone between telcoms. OC3 are usually local loops that dedicated T1 - T3 connect your business to. So an OC-12 (or Larger) fiber link runs into a metro area. It is then split into OC3 local loops that service differnet areas in the same city. T1 and T3 lines then connect your network to the OC3 local loop as a permanent circuit. Also the OC lines are fiber anything connected to it and the set up costs are WAY more expensive than dealing with copper.