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Appendix C

Cable Specifications

This appendix describes the signals associated with the pins on the console port, the 10BaseT Ethernet port, and the ISDN BRI S/T port. It also shows the voltages of the power connector. This information will assist you in obtaining custom cables from your supplier.

Console Port

ISDN BRI Connectors

Ethernet 10BaseT Connector

Ethernet 10BaseT Crossover Cable Connector

Power Connector

Console Port

Table C-1 lists pin assignments for the GT 70 Series router console port.

Table C-1 Console Port Cable - RS-232 DTE Male

	Connector Pin #	Signal
	1	Data Carrier Detect
	2	Received Data
	3	Transmitted Data
	4	Data Terminal Ready
	5	Signal Ground
	6	DCE Ready
	7	Request To Send
	8	Clear To Send
	9	Call Indicate

ISDN BRI Connectors

Table C-2 lists the cable specifications for the ISDN BRI S/T and Table C-3 lists the cable specifications for the ISDN BRI U physical devices.

Table C-2 ISDN Cable Pin Assignments for S/T Device

	Connector Pin #	Description
	3	Transmit Data +
	4	Receive Data +
	5	Receive Data -
	6	Transmit Data -

Table C-3 ISDN Cable Pin Assignments for U Device

Connector Pin #
Description

4
TIP

5
RING

Ethernet 10BaseT Connector

Table C-4 lists the pin assignments for the Ethernet 10BaseT RJ-45 connector.

Table C-4 Ethernet Cable 10BaseT Connector Pin Assignments

	Connector Pin #	Description
	1	Transmit Data +
	2	Transmit Data -
	3	Receive Data +
	6	Receive Data -

Ethernet 10BaseT Crossover Cable Connector

Table C-5 lists the pin assignments for the Ethernet 10BaseT crossover cable.

Table C-5 Ethernet Crossover Cable Connector Pin Assignments

	Connector Pin #	Description
	1	Receive Data +
	2	Receive Data -
	3	Transmit Data +
	6	Transmit Data -

Power Connector

Table C-6 shows the voltages of the power connector pins.

Table C-6 Power Connector

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