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
Jumpers
7. To Media Gateway (3-Pair Modularity)
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)
2 3
88
4
9
7
6
1
12
12
1110
13
r7
6
47
9
7
aCJ
L
03
1
396