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1.5 ADSL Port Connection
1.5.1 MDF Connections (Main Distribution Frame)
The POTS splitter should be connected to MDF on building or CO side in Figure 1-10. An MDF is
usually place in the building's telephony room or on central office room.
It can terminate the outside telephone line into the building. Most MDF has surge protection
feature to protect the equipment from damage. In general, The LINE and PHONE interface all
connect to MDF and then to outside connection.
1.5.2 Centric Patch Panel Connection
The IVD can provide ADSL and voice services over the same telephone wiring. It also has built in
splitters internally that can save space and simplify installation.
If the application is using on building environment, the CPP (Centric Patch Panel) is preferred. The
purpose of CPP module is to transfer RJ-21 jack in IVD to RJ-11 connector. The CPP front panels
are shown in Figure 1-11. It is usually installed between end-user's equipment and telephone
company in a basement or telephone room. The CPP is the point of termination for the outside
telephone company lines coming into a building and the telephone lines in the building.
Figure 1-10. MDF connection architecture
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Version: 1.5
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