Deployment Reference - Allied Telesis AT-SPL-B4 User Manual

5. Deployment reference:

In a typical deployment, the CO POTS splitter is located in
the ADSL service provider's CO.
Copper loops enter the CO in bundles, terminating at the
MDF. The provider extends the ADSL Tip / Ring wire pairs
to the horizontal distribution frame (HDF) where the CO
POTS splitter, which splits the voice and ADSL traffic is
mounted.
The Phone pairs are wired from the CO splitter to the CO
switch. The ADSL pairs are wired from the CO splitter to the
DSLAM as below.
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