The TMC-GSFP electrical-to-optical Ethernet media converters accept a 10/100 or 1000 Mbps electrical input and converts to a 100 or 1000 Mbps optical output (selected by a dip switch) and the 100/1000 Mbps optical input back to the 10/100/1000 Mbps electrical output. "Auto-Negotiating" is supported on the copper interface side. These devices use either one or two optical fibers, depending upon the selection of sold-separately SFP optical module.

A PoE model, the TMC-GSFPPOEM meets the IEEE802.3at standard and provides 30 watts of PoE+ power.

The series consists of small size single channel models, TMC-GSFPM & TMC-GSFPPOEM, and a standard size, single-channel model, TMC-GSFP. The standard size unit may be directly plugged into the SBP-C14 / SBP-C03 Rack or operated as a standalone module. The small size unit operates as standalone modules only.