AT&T Not Availab installation instructions DCP Line Interface, Connector Block DCP Jack Interface

DCP Line Interface

The DCP line interface is a standard D8W 8-wire modular cord. One pair is used for balanced digital transmission to the PBX switch; another pair is used for balanced digital reception from the PBX switch. A third pair in the 8-wire modular cord provides auxiliary power for the adjunct, and a fourth pair is used only by the CALLMASTER II with Recorder Interface to provide the analog Record Out signals to an external tape recorder.

The 8 line-jack pins are numbered in increasing order from left to right when facing the jack with the tab slot down. The table below shows pin assignments for the line cord and jack block interface.

CONNECTOR BLOCK			DCP JACK INTERFACE
Conn. Block	D Inside			Signal
Pin Number	Wire Color	Pin	Name	Description
3	W-O	1	OD1	Balance output from
				telephone (power –48V)
4	O-W	2	OD2	Balance output from
				telephone (power –48V)
5	W-G	3	ID1	Balance input from
				PBX (power 0V)
1	W-BL	4	REC1	Record output from
				a CM II with Recorder Interface
			U-T*	On a CM III w/o Rec. Interface)
2	BL-W	5	REC2	Record output from
				a CM II with Recorder Interface
			U-R*	On a CM III w/o Rec. Interface)
6	G-W	6	ID2	Balance input from
				PBX (power 0V)
7	W-BR	7	P1-	Adjunct power –48V
				(to adjunct jack)
8	BR-W	8	P2+	Adjunct power common
				(to adjunct jack)

*U-T = ‘‘Tip’’ U-R = ‘‘Ring’’

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