Matrix Telecom SARVAM UMG System Manual page 26

A multi-core cable runs from the ETERNITY GENX into the MDF. From the distribution frame, the smaller cables
run into each individual extension telephone outlet or socket (RJ11 or RJ45).
In a multi-storied building or on a widely spread out premises, it is common to have more than one distribution
frame, called the Intermediate Distribution Frame (IDF) on each floor, to provide the connection between the MDF
and the individual telephone wiring. IDFs function as wiring points to gather and distribute wiring. IDFs are used
when a large number of extensions are to be connected and the wire runs extend over hundreds of feet; hence the
distance is too great to economically terminate every extension individually to the MDF.
• Select a suitable MDF (and IDF, if required) with the standard lead-in cable termination KRONE modules.
• Ensure that the MDF complies with the local building telecom wiring Guidelines, Rules and Regulations.
• Select an appropriate site to install the MDF.
Location of the MDF
• The MDF is normally installed inside the building in a location and position which is free from the ingress of
dust and moisture, and which is not subject to damp or humid conditions.
• This also applies to MDF installed outside the building. It must be protected from exposure to weather
conditions, dust, dampness and humidity
• Do not install the MDF in any of the following locations:
• In washing or toilet facilities, boiler/plant/machine rooms or any area subject to corrosive fumes and
fluids;
• In fire escape stairways;
• Within a cupboard containing a fire hose reel;
• Within any refrigeration room or sauna heater room;
• Near any water feature or water body like fountains, sprinklers, a bath, shower or other fixed water
container, a swimming pool, paddling pool, spa pool or tub; or any area where hosing down operations
are carried out.
• In a high voltage electrical switch room or near a heavy voltage transformer.
• The MDF should be robust and securely attached to a permanent building element such as a wall, floor or
column. Do not mount the MDF on movable elements such as hinged panels or wheeled trolleys.
• Provide adequate lighting in the place where the MDF is located.
• Provide adequate space around the MDF where any person is required to pass to enable safe and
convenient access to the MDF and ready escape from the vicinity under emergency conditions.
• Any room containing the MDF must not require the use of a tool, key, card, number pad or the like to exit
the room. Ensure a quick hurdle-free exit from such a room.
• The MDF or the enclosure in which it is located should have the provision for securing with a key, lock or
tool. External MDF should be adequately secured against vandalism and access by children or
unauthorized persons.
• The MDF enclosure should be designed so as to prevent access to live parts by unqualified persons and
should be free of exposed sharp edges.
• The MDF enclosure should be protected from insects and rodents.
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