In our furture Lan we will use 2 cisco 3750 ps-e switches and we would like to connect these two 3750 to another switch. this other switch will be connect to another LAN(in another building) by optical fiber.
witch switch must we choose to connect the 3750 and receive the optical fiber??
Based on your requirement you can use WS-C3750G-24TS-S/WS-C3750G-24PS.
This will give you Fiber uplinks (GLC-SX-MM,GLC-SX-LX/LH) as well as UTP ports,where you can terminate your next building fiber links, as well as MetroEthernet link like 10,20 50 100Mbps.
Also , these switches can be scaled as you must be knowing by adding additional switch & making it as stack.
rate if useful..