GLC-T vs SFP-GE-T vs GLC-TE, How to Choose? GLC-T, SFP GE-T, and GLC-TE are major types of 1000BASE-T SFP copper transceiver. All of these products are compatible with same types of cables, including copper cables up to 100 meters (5 unshielded). These models also support auto-negotiation with MDIX and MDI Auto. What are their similarity and differences? Many IT professionals may be confused. We will make a comparison on those 3 1000BASE-T SFP modules.