Probably not, even with a transceiver, because most transceivers are the same speed output as input.

What you need is a cheap switch with a 1000sx optical port and a/some 10/100/1000 ports (to act as a differential transceiver).

Part of the issue is the buffering needed for traffic coming from the 1000Mbps side to the 100Mbps side.

If you find one, let us know!

Good Luck

Scott

You can buy a 100FX SFP for your 3750. (U$S 200).

This way you keep a simple and clean setup.

Guido.

Please rate all the helpful comments.

It won't. GLC-SX-MM is a 1000Base and won't auto-negotiate to 100 mbps.