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Topic: Main distribution frame

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	Main distribution frame - Wikipedia, the free encyclopedia
		In telecommunication, a main distribution frame (MDF) is a distribution frame on one part of which the external trunk cables entering a facility terminate, and on another part of which the internal user subscriber lines and trunk cabling to any intermediate distribution frames terminate.
		The MDF is used to cross-connect any outside line with any desired terminal of the multiple cabling or any other outside line.
		The MDF in a private exchange performs functions similar to those performed by the MDF in a central office.
	www.wikipedia.org /wiki/Main_distribution_frame (147 words)

	Main and intermediate distribution frame
		The main and the intermediate distribution frame (MDF) is designed for connection between subscriber lines and connection lines of cable telecommunication network and station equipment.
		The main and the intermediate distribution frame (MDF) has a cylindrical modular construction, which allows realization of different kinds of combinations in height and length.
		Arrangement (position) of the backmount frames: horizontal backmount frames for subscriber side - in the upper part of the construction; vertical backmount frame for network side - in the lower part of the construction.
	borima.infotel.bg /borima/menu8-eng.htm (382 words)

	Telephone line access system for main distribution frame - Patent 4583215
		However, a problem exists in that such connection of multiplexing equipment to the subscriber telephone lines at the main distribution frame is contraindicated due to the brittleness of the wires and the lack of space between the harnesses and between the connector blocks.
		In accordance with the usual practice in the construction of main distribution frames a set of lightning or surge protector modules 42 is inserted in connectors found in each vertical block 28 so as to provide electrical connection between the wires of the harnesses 38 and the harnesses 36.
		A frame sync signal is provided on line 109 from the scan unit 54 and is connected to the divide by five divider 96 and the counter 94 for resetting the divider and counter at the state of each frame.
	www.freepatentsonline.com /4583215.html (6268 words)

	Automatic MDF (main distribution frame) apparatus - US Patent 6295483 (Site not responding. Last check: )
		The automatic MDF apparatus according to claim 1, wherein a BWB for connection between a primary side and a secondary side and a BWB for connection between a secondary side and a tertiary side are provided.
		The automatic MDF apparatus according to claim 3, wherein out of connectors provided on the matrix board aggregate, connectors for external connection, connectors for connection between a primary switch and secondary switch and connectors for connection between a secondary switch and a tertiary switch are separately mounted on different sides of the matrix board aggregate.
		The automatic MDF apparatus according to claim 3, wherein matrix board aggregates of the automatic MDF apparatus are used by rotating an arraying direction of the matrix board aggregates by 90 degrees.
	www.patentstorm.us /patents/6295483.html (6794 words)

	Main distribution frame -- Facts, Info, and Encyclopedia article (Site not responding. Last check: )
		The MDF is used to cross-connect any outside (A spatial location defined by a real or imaginary unidimensional extent) line with any desired (Station where transport vehicles load or unload passengers or goods) terminal of the multiple cabling or any other outside line.
		The MDF usually holds ((usually plural) the office that serves as the administrative center of an enterprise) central office protective devices and functions as a test point between a line and the office.
		Synonym (in (Transmitting speech at a distance) telephony) main frame.
	www.absoluteastronomy.com /encyclopedia/m/ma/main_distribution_frame.htm (142 words)

	MAIN DISTRIBUTION FRAME
		MDF(main distribution frame), krydsfelt (distributor), hovedfordelingsramme (it is used for associating any outside line with any desired terminal in a multiple or with any other outside line.It usually carries the central office protective devices and functions as a test point between line and office, main distributing frame).
		hoofdverdelingsraster, hoofdverdeler (distributing frame, distribution frame, it is used for associating any outside line with any desired terminal in a multiple or with any other outside line.It usually carries the central office protective devices and functions as a test point between line and office, main distributing frame).
		RG (main distributing frame), RE (main distributing frame), répartiteur principal (main distributing frame), répartiteur général (main distributing frame), répartiteur d'entrée (main distributing frame).
	www.websters-online-dictionary.org /Ma/Main+Distribution+Frame.html (486 words)

	MDF: Main Distribution Frame
		In telecommunication, Main Distribution Frame (MDF) is a distribution frame on one part of which the external trunk cables entering a facility terminate, and on another part of which the internal user subscriber lines and trunk cabling to any intermediate distribution frames terminate.
		MDF is a cable rack that interconnects and manages the telecommunications wiring between itself and any number of IDFs (Intermediate distribution frame), which connects internal lines to the MDF.
		For example, an enterprise that encompasses a building with several floors may have one centralized MDF on the first floor and one IDF on each of the floors that is connected to the MDF.
	www.javvin.com /hardware/MDF.html (106 words)

	Encyclopedia: Main distribution frame (Site not responding. Last check: )
		In telephony, a distribution frame is a closet or area set aside which contains equipment which multiplexes users transmission mediums over a higher-capacity medium.
		The MDF usually holds central office protective devices and functions as a test point between a line and the office.
		A telephone handset A touch-tone telephone dial Telephone The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device that transmits speech by means of electric signals.
	www.nationmaster.com /encyclopedia/Main-distribution-frame (400 words)

	Surge voltage protection means for attachment to a main distribution frame - Patent 4616288
		A surge voltage protection device for attachment to a main distribution frame having connection terminals disposed in a plurality of parallel rows and permitting non-stripped connection of electrical conductors.
		A main distribution frame having connection terminals disposed in a plurality of parallel rows and permitting non-strip connection of electrical conductors is known, for example, from DE-OS No. 28 14 018.
		In the illustrated form of the invention, the two fastening parts 8 are screwed to the main distribution frame 1 and the distance between the frame and the guide frame 4 is defined by means of a spacing bushing 22.
	www.freepatentsonline.com /4616288.html (1616 words)

	Telephone main distribution frame cutover system - Patent 4653092
		means whereby the new main distribution frame (10) is in series with the old main distribution frame (15) and wherein a second entry into the cable vault splicing area (12) is avoided during the converting process.
		Thus, during the length of the test period, the old main distribution frame is used via cables 18 rather than by the old cables 16 which are removed during the splicing of cables 13 into splicing area 12.
		Lines 13 from the new main distribution frame 10 are then straight spliced into the splicing area 12 of main feeder line 11 and, at the same time, the lines from the old main distribution frame 15, shown as dashed lines in FIG.
	www.freepatentsonline.com /4653092.html (3928 words)

	Networking: MDF (Site not responding. Last check: )
		An MDF (main distribution frame) is a free-standing or wall-mounted rack for managing and interconnecting the telecommunications cable between the main distribution frame and the intermediate distribution frame (
		The MDF is also the connection point for your Local Area Network (LAN) to the district Wide Area Network (WAN).
		For example, an MDF at a school might be located in the library media center and it would connect to each building in the school via the IDF.
	edtech.sandi.net /presentations/networking/mdf.html (108 words)

	Definition: main distribution frame
		main distribution frame (MDF): A distribution frame on one part of which the external trunk cables entering a facility terminate, and on another part of which the internal user subscriber lines and trunk cabling to any intermediate distribution frames terminate.
		Note 1: The MDF is used to cross-connect any outside line with any desired terminal of the multiple cabling or any other outside line.
		Note 3: The MDF in a private exchange performs functions similar to those performed by the MDF in a central office.
	www.its.bldrdoc.gov /fs-1037/dir-022/_3192.htm (123 words)

	SASCO
		A Main Distribution Frame (MDF) is the central connecting point for cabling.
		It also serves as the main location from which cross connecting and testing are done.
		The MDF has separate voice and data trunks and systems, common local horizontal service and trunks generally connected to systems.
	www.sasco.com /faqlinks/q2answer.html (117 words)

	Main Frame in Distribution Costs - Outcome 3 (Site not responding. Last check: )
		This outcome assesses the student’s knowledge of techniques used in planning and controlling inventory levels and their application when changes are made to production and/or sales levels particularly in relation to this cost implications of such changes.
		Physical distribution management was described as "the last great frontier of costs reduction" by Peter Drucker.
		It follows therefore, that any reduction which can be achieved in distribution costs, preferably without any corresponding reduction in levels of service, will reduce total costs, make the company more competitive and increase profits.
	floti.bell.ac.uk /6430113/frmain03.htm (1218 words)

	Main Frame in Distribution Costs - Outcome 4 (Site not responding. Last check: )
		This section of the unit is mainly concerned with the application of knowledge and skills required in the previous outcomes.
		Decisions have to be made frequently on the best ways of distributing goods, and what may seem at first sight to be the most economic solution may not in fact turn out to be so, once all the various factors have been taken into account.
		Prepare a cost schedule to show the total distribution costs incurred for each mode of transport and identify the most economical method of transporting goods from the factory to the warehouse.
	floti.bell.ac.uk /6430113/frmain04.htm (1003 words)

	Install the Main Distribution Frame (MDF) Hardware
		SYSTIMAX 110-type hardware is used for the Main Distribution Frame (MDF).
		Example MDF Connections (Avaya G600 Media Gateway) shows a detailed example of the Avaya G600 Media Gateway cables connecting media gateways and satellite closets to the Main Distribution Frame (MDF).
		The preferred location of the Main Distribution Frame (MDF) is directly behind the Avaya G600 Media Gateway rack(s).
	www.avayadocs.com /elmodocs2/s8700/ginst/GInstCableMG7.html (678 words)

	CSSN:Urban:Building:Floors
		The backbone in each school consists of 12 strand fiber, coax and (75)Cat3/(25)Cat 5 voice connected to the buildings phone demarc, all run between the Main Distribution Frame and Intermediate Distribution frames.
		The Main Distribution Frame (MDF) room is connected to at least one Intermediate Distribution Frame room (IDF) on each floor of the school building.
		In the MDF a Modem/CSU communicates with the Modem/CSU in the Board office and passes data to a CISCO router, which, in turn, distributes data packets to an Ethernet Hub.
	www.edc.org /CCT/CSSN/urban/build/flrplan.htm (86 words)

	[No title]
		A fixed component covers the costs of housing the main distribution frame and the costs of the rooms needed for cabling into the building of the exchange or the concentrator unit.
		The assumptions about the number and location of main distribution frames (MDF) and nodes of the generic network underpinning costing have a significant impact on the calculation results, especially those for the subscriber line.
		Costing does not cover distribution and customer administration costs in the case of special network access since these costs are highly customer-specific and hence not accessible within the framework of a generic model.
	www.itu.int /ITU-D/study_groups/SGP_1998-2002/SG1/StudyQuestions/Question_12/RapporteursGroupDocs/000/006e4.doc (4977 words)

	Telecommunications (Site not responding. Last check: )
		Cost-effectiveness, shorter installation periods, higher packing density, increasing digitisation: buzz words which represent key criteria for the expansion or new construction of main distribution frame systems.
		The Quante™ ID 3000™ splitter block is used on main distribution frames, takes up a minimum of space and combines narrow and broadband signals.
		Innovative fibre-optic main distribution frame systems must make precise allowance for the particular demands of fibre-optic conductors, for example a high level of compactness, whilst retaining clarity.
	cms.3m.com /cms/DK/da/2-133/iRRFrFK/view.jhtml (667 words)

	Main Distribution & Backmount Frame (Site not responding. Last check: )
		The MDF 552 wall/floor mounted Main Distribution Frame can serve as a main building flexibility and system connection point for medium sized distribution schemes, or as a test jack frame for large PBXs sited remotely from the building distribution frame.
		A section at the top and bottom is reserved to allow jumpers to pass along the length of the frame.
		When using as a building frame, this arrangement is suitable for 600 pairs termination per vertical.
	www.isolectra.com.my /mdf.htm (323 words)

	Main distribution frame: Definition and Links by Encyclopedian.com - All about Main distribution frame (Site not responding. Last check: )
		Main distribution frame: Definition and Links by Encyclopedian.com - All about Main distribution frame
		Note 1: The MDF is used to cross-connect any outside line with any desired terminal of the multiple cabling or any other outside line.
		Note 2: The MDF usually holds central office protective devices and functions as a test point[?] between a line and the office.
	www.encyclopedian.com /ma/Main-distribution-frame.html (152 words)

	Siemens Communications Lexicon - automatic baud rate detection (ABR)
		The term main distribution frame occurs in structured wiring, and local exchanges.
		In structured wiring the main distribution frame is a local distribution frame also known as the campus distributor (CD), which connects to the building distribution frames.
		At the local exchange, the main distribution frame is the point where the trunk cable is fed to wiring distribution points.
	networks.siemens.com /communications/lexicon/7/f006657.htm (113 words)

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