Green (T1) and red (R1) are the standard wiring colors used in the next two illustrations.
In the following example, a NID is used without a POTS splitter. It includes an existing POTS line and a second pair installed for DSL access. The POTS pair for the existing POTS line wiring does not need to be disconnected unless a POTS splitter is going to be installed.
Telephone Network Interface Device (NID)
Customer Premises
Tip
T1
(Green)
Ring
R1
(Red)
Existing POTS
Wiring to
Telephone
Demarcation Point
DSL Pair |
POTS Pair |
DSL/POTS |
Access from |
Local Loop |
Ground |
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