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Main distribution frame hardware installation
Issue 3 January 2008 17
Main distribution frame hardware installation
This section provides information on installing a main distribution frame (MDF) in an equipment
room. It must be installed before connecting media gateways to it and before connecting it to
the public switched telephone network (PSTN) outside the building and stations within the
building.
SYSTIMAX 110-type hardware is used for the MDF. 110-type hardware is available in two basic
types: the 110A and 110P. The 110A requires less wall space than the 110P. The 110P includes
horizontal and vertical cable troughs for managing cross-connect cables. The media gateways
are connected to the MDF with the supplied B25A male to female 25-pair cables. The cables
are provided in 10-foot (3 meter) and 15-foot (4.5 meter) lengths.
Figure 1: Example MDF connections (MCC1 Media Gateway) shows the cross-connections for
common circuit packs. See this figure when cross-connecting wire pairs to the MDF.
Figure 1: Example MDF connections (MCC1 Media Gateway)
Figure 2: Example MDF connections (G650 Media Gateway) on page 18 shows a detailed
example of the G600 Media Gateway cables connecting media gateways and satellite closets to
the MDF. This figure shows the cross-connections for one example station circuit.
widfccf2 EWS 102798
4
1 10 19 4 13 22 2 11 20 5 14 23 3 12 21 6 15 24 9 18 7 16 25 8 17
Port Tie Trunk
Port MET Line 4
4 Port Tie Trunk
w/ E&M Signaling
Port Data Line 8
Port Digital 8
Port BRI 12
Port Hybrid 8
Port DID 8
Port Analog
Port CO
8
8
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Port Digital
24
16
DS1
Port Analog
Port Analog
16
24
Port Digital