Jump to content
Posted 24 April 2010 - 04:30 AM
Posted 25 April 2010 - 01:32 AM
Hope this helps
Associate in Applied Science - Network Systems Management - Trident Technical College
Posted 25 April 2010 - 09:05 PM
Posted 25 April 2010 - 09:33 PM
In addition to the above definition, Intermediate frames are generally used to house distribution hardware such as Ethernet switches and concentrators in order to keep the twisted pair cable length from the switch to the user desktop under the 330' (100 Meter) Ethernet spec limit. In multistory buildings you almost always have at least one IDF per floor, and in larger buildings there may be several per floor. Almost all wired infrastructure - data, phones, alarms, video, etc. - all "homes" to the closest IDF closet, and then is trunked to the MDF, usually on the ground floor or basement. With Ethernet the trunk is usually accomplished using a fiber optic high speed cable (or a few) in a star or ring architecture, which is usually referred to as the building backbone. In other cases the switches may be "Daisy-Chained" between floors with copper cable, called (uniquely enough) "riser" cable.
Posted 25 April 2010 - 09:53 PM
Edited by Orecomm, 25 April 2010 - 09:55 PM.
Posted 26 April 2010 - 12:29 PM
Just a bit of background in networks. About 35 years worth. Network architecture and design, engineering, consulting. I designed campus, building, and WAN networks for a bunch of Fortune 500 outfits, a couple of Colleges, and one fair-to-middling sized nation. Currently I do some consulting and teach advanced 802.11 courses. I also help a buddy in town when he needs help installing cable from time to time (I'm not picky about what I do as long as I like the folks I get to work with). So I've seen plenty of MDF/IDF rooms, from design to implementation.
By the way, the picture is from about 1980. I was managing a group at Tandem Computers at the time. That's an ADM2 "intelligent" terminal on the desk.
Edited by MrBruce1959, 26 April 2010 - 12:30 PM.
0 members, 0 guests, 0 anonymous users