Mdf Main Distribution Frames

Main Distribution Frames

Main Distribution Frames
• A Main Distribution Frame (MDF) is the interface between
The subscriber cables coming from the local network (line side) and the switching equipment in the exchange (system side)

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Main Distribution Frames
Different criteria need to be taken into account when planning a new MDF
1. Room dimensions 2. Position/environment 3. Capacity 4. Jumper volume 5. MDF configuration 6. Module types 7. Delivery conditions

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Main Distribution Frames
1. Enough space ? Room dimensions: Height, Width, Depth

2. Position/environment Room constitution (e.g. computer/raised floor) Air conditioning ? Layout of the switching equipment position Free selection or given ?

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Main Distribution Frames
3. Needed capacity on both line side and system side
Typically ratio of 1 : 1.2/1.5 (system/line side)

4. Sufficient total jumpering volume
Typically jumper diameter 0.6 … 0.9 mm

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Main Distribution Frames
5. MDF configured as

Wall-secured (Line and system side vertical)

Free-standing single-sided (Line and system side vertical)

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Main Distribution Frames
Free-standing double-sided (Line and system side vertical)

Free-standing double-sided (Line side vertical, system side horizontal)

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Main Distribution Frames
6. MDF prepared for
» System MDF 71

» LSA-PLUS® Series 2

» LSA PROFIL®

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Main Distribution Frames
7. Delivery conditions
» Unassembled

» Pre-assembled

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Main Distribution Frames

Our Solutions

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Main Distribution Frames
– MDF 71

Vertical (line side)

Horizontal (system side)

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Main Distribution Frames
– MDF 71
– Features:
» Connectivity: » Design: » Horizontal jumpering capacity: » Room height: » Configuration: » Delivery conditions: System 71 Vertical/horizontal 39.000 pairs 2.730 – 4.300 mm Free-standing, double-sided Unassembled Distributor for large and medium capacity Different sizes available Modular design =