Cabletron Systems 9A000 manual C-11, Hardware Specifications

Hardware Specifications

C.2.5.1 Connecting Switches with TP25 Network Modules

The TP25 network modules have a standard RJ45 connector that uses pins 1, 2, 7 and 8. When connecting switches using TP25 network modules, you will need to use a UTP crossover cable with the following specification:

•Pin 1 to pin 7 in both directions.

•Pin 2 to pin 8 in both directions.

TP25	Pin	Pin	TP25
RX+	1	1	RX+
RX-	2	2	RX-
	3	3
	4	4
	5	5
	6	6
TX+	7	7	TX+
TX-	8	8	TX-

C.2.5.2 Connecting Switches with Token Ring Pinouts to Cabletron Switches

Although Cabletron Systems’ Switches use the 1, 2, 7 and 8 pin assignment recommended by the ATM Forum, some switches use pins 3, 4, 5 and 6. Con- necting one of these switches to a Cabletron Switch would require the connec- tions to be mapped as follows:

•Pin 3 to pin 7 in both directions.

•Pin 4 to pin 1 in both directions.

•Pin 5 to pin 2 in both directions.

•Pin 6 to pin 8 in both directions.

Alternative switch	Pin	Pin	Cabletron Switch
	1	1	RX+
	2	2	RX-
RX+	3	3
TX+	4	4
TX-	5	5
RX-	6	6
	7	7	TX+
	8	8	TX-

C-11