As a follow up. When wiring back to back carrier 4W DS0 Special Service channel units, the wiring scheme will be:
FAC 1 TR to FAC 2 T1R1/FAC 1 T1R1 to FAC 2 TR.
With 4W D4 and DLC, D4 T1R1 to DLC ODD pair assignment/D4 TR to DLC EVEN pair assignment.
The field will wire NCTE to the PG Cable BP assignment in a similar fashion: ODD BP signal IN/EVEN BP signal OUT.
If 4W DLC in the CO, and 2W DLC in the field, the field tech only wires the ODD BP assignment.
NOTE: LiteSpan E&M channel units are not Dual Channel tyoes, and only support a single DS0 channel. Odd Pair is TR, Even Pair is T1R1, next higher ODD pair are the E & SG leads, and the next higher EVEN pair are the M & SB leads to support Type-I/II E&M signaling applications.
