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)
2
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
3
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 ?
4
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
5
Main Distribution Frames
5. MDF configured as
Wall-secured (Line and system side vertical)
Free-standing single-sided (Line and system side vertical)
6
Main Distribution Frames
Free-standing double-sided (Line and system side vertical)
Free-standing double-sided (Line side vertical, system side horizontal)
7
Main Distribution Frames
6. MDF prepared for
» System MDF 71
» LSA-PLUS® Series 2
» LSA PROFIL®
8
Main Distribution Frames
7. Delivery conditions
» Unassembled
» Pre-assembled
9
Main Distribution Frames
Our Solutions
10
Main Distribution Frames
– MDF 71
Vertical (line side)
Horizontal (system side)
11
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 =