the Transition Networks Tn-glc-xxx Series Small Form Factor Pluggable (sfp) Tranceiver Modules Are Designed To Install In Any Sfp Port Allowing For 1000base-t, 1000base-sx Or 1000base-lx Interfaces To The Network Through The Sfp Connector. The Tn-glc-xxx Tranceivers Are Cisco Compatible* And Are Designed For Bi-directional Serial-optical Data Communication Such As Gigabit Ethernet Or Fiber Channel At Speeds Up To 1.25 Gbps.