Intel SE7520JR2 3.4.10.2.4Rear RJ45 Serial B Port Configuration

Functional Architecture				Intel® Server Board SE7520JR2
		Serial B
				Bus
	SIO	Serial A		Exchange	BMC
			2 to 1
			Mux

Level Level

Shifter shifter

Header Rear

RJ45

Figure 12. Serial Port Mux Logic

3.4.10.2.4Rear RJ45 Serial B Port Configuration

The rear RJ45 Serial B port is a fully functional serial port that can support any standard serial device. Using an RJ45 connector for a serial port gives direct support for serial port concentrators, which are widely used in the high-density server market. For server applications that use a serial concentrator to access the server management features of the baseboard, a standard 8-pin CAT-5 cable from the serial concentrator is plugged directly into the rear RJ45 serial port.

To support either of two serial port configuration standards which require either a DCD or DSR signal, a jumper block (J7A1), located near the back IO ports, is used to configure the RJ45 serial port to the desired standard. The following diagram shows the jumper block location and its jumper settings.

34

1 2

Pins 1&3 – DCD to DTR *Pins 2&4 – DSR to DTR

* = Factory Default

Figure 13. RJ45 Serial B Port Jumper Block Location and Setting

68	Revision 1.0
	C78844-002