S-class optics are available only in the most common reaches needed in enterprise and data center applications.  S-class is Ethernet only, no OTN  or. In addition, it is no TAA compliance for S-class. Moreover, S-class and non-S-class optics are with...

Yes, connecting to another switch with copper interface is an ideal choice, since the 3750G-12S at hand only has Gigabit Ethernet SFP ports.

If you have looked at the FOA technical analysis of "Power Penalty For Mixing 50/125 And 62.5/125 Fibers In One Link", you might find it is feasible to mix them in a cable run, just remember to use color-coded cables. Even if you're running below GBE...

To get a 10G link, you need switches with 10G SFP+ ports and SFP+ transceiver modules accordingly. SR types are for short-range transmission, which operate on multimode fibers (OM3, OM4). While LR transceivers are for long-range links, often used wit...