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MDF connections to stations and the public switched telephone network
46 Installing and Connecting the MDF and Telephones
Figure 18: 4-pair circuit distribution and connectivity
Figure notes:
1. Part of Main Distribution Frame
(MDF)
2. 3-Pair Connecting Blocks
3. 4-Pair Connecting Blocks
4. Purple Field
5. Blue Field
6. Patch Cord or Cross-Connect
3. 4-Pair Connecting Blocks
4. Purple Field
5. Blue Field
6. Patch Cord or Cross-Connect
Jumpers
7. To Media Gateway (3-Pair Modularity)
8. B25A Cable
9. Connectorized (Staggered Finger)
8. B25A Cable
9. Connectorized (Staggered Finger)
Multiple 25-Pair Cable
10. 258A or BR2580A Adapter
11. Information Outlet
12. 4-Pair Circuit
13. DIW Station Cable (D-Inside Wire)
13. DIW Station Cable (D-Inside Wire)
2
3
8
8
4
9
7
6
1
1 2
1 2
1 1
1 0
1 3
r 7 6 4 7 9 7 a C J L 0 3 1 3 9 6