Hi mlh, Depends on the speed. 10/100mbps full/half duplex uses two pair of the four pairs in a CAT 5 cable. 1000mbps full/half duplex uses all four pair of a CAT 5 cable.
Follow the link for the explanation of full and half duplex. http://www.webopedia.com/TERM/f/full_duplex.html Theoretically in full duplex mode each machine can send and receive on a separate pair thus doubling your bandwidth. For example, 100mbps in full duplex mode could send 100mbps on one pair and receive 100mbps on the other pair at the same time which equals 200mbps. This would mean both devices are sending 100mbps. Full duplex would be a point-to-point connection and nothing in between the two devices. In half duplex mode only one machine can send at anytime. I don't know if I covered it all, please correct me if I am wrong. HTH, Scott -----Original Message----- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 8:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=31646&t=31643 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

