I found a manual online: http://www.carnagevisors.net/dec94mds/detmminb.pdf It's a repeater (a.k.a., hub) not a switch (a.k.a., bridge). It's not fancy at all. A repeater takes incoming Ethernet transmissions and repeats them on all the other ports unconditionally. Also, a repeater is by definition a half duplex device, so you have the CSMA/CD (collisions and all that) of classic Ethernet. A bridge receives a packet and transmits it on the appropriate output port (if any), and can be full duplex. The 900TM is 10Base-T, so 10 Mb/s Ethernet -- not fast Ethernet (100Base-T). Suitable for old slow Ethernet devices... paul -----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Mark Wickens Sent: Wednesday, October 28, 2009 11:22 AM To: hecnet at Update.UU.SE Subject: [HECnet] DECrepeater 900TM Can someone explain to me what a decrepeater 900tm is? Is is a fancy 32 port 10MB switch? Regards, Mark. --