DEFINITY Made Easy Tools
Issue 3, December 2001

Install Telecommunications Cabling

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Main Distribution Frame (MDF) Hardware

SYSTIMAX 110-type hardware is used for the Main Distribution Frame (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 system is connected to the MDF with the supplied B25A male to female 25-pair cables. The cables are provided in 10-foot (3 m) and 15-foot (4.5 m) lengths.

Example MDF Connections (Single-Carrier Cabinet shows a detailed example of Single-Carrier Cabinet cables connecting system cabinets and satellite closets to the Main Distribution Frame (MDF). The figure shows the cross-connections for one example station circuit.

Example MDF Connections (Multicarrier Cabinet) shows the cross-connections for common circuit packs. Refer to this figure when cross-connecting wire pairs to the MDF.

Example MDF Connections (Single-Carrier Cabinet

Figure Notes

1. Rear of Port Cabinet


2. Main Distribution Frame (MDF)


3. Port Distribution Field (Purple Field)


4. Station Distribution Field (White Field)


5. Trunk/Auxiliary Field


6. Purple Field


7. Yellow Field


8. Green Field


9. Satellite Closet


10. Auxiliary Cabinet (Yellow Field)


11. White Field


12. Blue Field


13. Cross-Connect Jumpers


14. 103A or Modular Wall Jack


15. 4-Pair Line Cord


16. To Line Circuit Pack

Example MDF Connections (Multicarrier Cabinet)

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Copyright� 2001 Avaya Inc.

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