Start liking this
No matter where you need to boost network performance, Bay Networks high-performance Ethernet solutions provide the bandwidth you need today, and a smooth migration path to the future. ??This is the BayStack 400-4TX 4-port, 10Base-T/100Base-TX MDA module for use in BayStack switches.
Nortel Networks BayStack 400 Model 4TX (AL2033004) Expansion Module