Black Box LRU4240 manual Communication Port PIN Assignments, DE-9 to DB-25 Adapter Pin Assignments

Dual Trunk E1 Router

COMMUNICATION PORT PIN ASSIGNMENTS

Table B-7 describes the COMM Port (RJ45) pin assignments.

	Table B-2	Communication Port Pin Assignments
RJ45 Pins	Signal	Description
3	SD	Send Data (from Dual Trunk E1 Router to terminal)
6	RD	Receive Data (from terminal to Dual Trunk E1 Router)
81	CTS	Clear To Send (I/O to all Dual Trunk E1 Routers only)
4, 5	SG	Signal Ground (bi-directional)
7	DCD	Carrier Detect

1.CTS is used by the Dual Trunk E1 Router as a collision avoidance line. This line should not be connected at the CRT terminal end of the COMM Port cable.

DE-9 to DB-25 Adapter Pin Assignments

BlackBox can provide a DE-9 to DB-25 adapter for the BlackBox DE-9 COMM Port ribbon cable. The pinout assignments for the adapter are listed in Table B-8 below.

Table B-3 DE-9 to DB-25 Adapter Pinouts

DE-9	DB-25
3	2
2	3
7	4
8	5
6	6
5	7
1	8
9	23
4	21

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