Sun Microsystems 60 service manual Twisted-Pair Ethernet Connector, Dtr

TABLE B-3

TABLE B-2Serial Port A and B Connector Pin Assignments (Continued)

Pin	Mnemonic	Signal Name	Description
18		Not connected	None.
19		Not connected	None.
20	DTR	Data Terminal Ready	Used to control switching of the
			DCE to the communication channel.
21		Not connected	None.
22		Not connected	None.
23		Not connected	None.
24	TXC	Terminal Clock	Generated by the DTE to provide
			timing information to the DCE.
			Used only in synchronous mode
			and only when the driver requests a
			locally generated clock. Otherwise,
			TXC echoes the modem-generated
			clock. The falling edge of the clock
			corresponds to the center of the
			data bit transmitted on TXD.
25		Not connected	None.

B.2 Twisted-Pair Ethernet Connector

The twisted pair Ethernet (TPE) connector is a RJ-45 type connector located on the motherboard back panel. FIGURE B-3illustrates the TPE connector configuration and

lists the connector pin assignments.

Caution –Connect only TPE cable into TPE connector.

Appendix B Signal Descriptions B-5