On Tue, 2005-01-04 at 15:06, Lyle Giese wrote: > Who uses hubs anymore? These rules don't apply to switches. These rules > were needed because of time delay with collisions. Switches don't propagate > collisions, but rather isolate them. > > And correct me if I am wrong, but are not the other two pairs used for PoE > now?
What is the spec for PoE anyway? > > Lyle > > ----- Original Message ----- > From: "Howard Lowndes" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]>; "Asterisk Users Mailing List - > Non-Commercial Discussion" <[email protected]> > Sent: Monday, January 03, 2005 9:30 PM > Subject: RE: [Asterisk-Users] phones with two ethernet ports > > > > On Tue, 2005-01-04 at 10:08, Race Vanderdecken wrote: > > > Each 4-pair wire has 8 wires in the "blue wrapper" cable. > > > > > > You only need 2 pairs, 4 of the wires, for 100MB Ethernet. > > > > > > You could split the wire at the wall jack and at the switch end where it > > > goes through the punch down thingy (the name escapes me at the moment.) > > > > > > You only need to run 1 blue/4 pair wire cable to each desk. You could > > > put a small hub on each desk to split our more sockets. > > > > > > For the life of me I will never understand why people believe that each > > > cubical/desk needs it own 4-pair cable, CAT5 cable connect back to the > > > server. > > > > There are limits to this idea of hubs, in that you can only cascade so > > many. If I remember rightly it's called the 5,4,3,2,1 rule. > > > > 5 segments, 4 hubs, 3 populated, 2 unpopulated, make 1 network. No > > doubt someone will correct me if I am wrong :) > > > > > > -- > > Howard. > > LANNet Computing Associates; > > Your Linux people <http://www.lannetlinux.com> > > ------------------------------------------ > > "When you just want a system that works, you choose Linux; > > when you want a system that just works, you choose Microsoft." > > ------------------------------------------ > > "Flatter government, not fatter government; > > Get rid of the Australian states." > > > > > > _______________________________________________ > > Asterisk-Users mailing list > > [email protected] > > http://lists.digium.com/mailman/listinfo/asterisk-users > > To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > _______________________________________________ > Asterisk-Users mailing list > [email protected] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users -- Howard. LANNet Computing Associates; Your Linux people <http://www.lannetlinux.com> ------------------------------------------ "When you just want a system that works, you choose Linux; when you want a system that just works, you choose Microsoft." ------------------------------------------ "Flatter government, not fatter government; Get rid of the Australian states." _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
