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Intel® Server Board SE7501WV2 TPS Functional Architecture
Revision 1.0
Intel reference number C25653-001
35
BMC
Bus
Exchange
SIO
2 to 1
Mux
Level
shifter
Level
Shifter
Header
Rear
RJ45
Serial B
Serial A
Figure 4. Serial Port Mux Logic
3.3.2.3.1 Rear RJ45 Serial B Port
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 allows direct support for serial port
concentrators, which typically use RJ45 connectors and 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 allow support of either of two serial port configuration standards used by serial port
concentrators, the J5A2 jumper block located directly behind the rear RJ45 serial port must be
jumpered appropriately according to the desired standard.
Note: By default as configured in the factory, the SE7501WV2 baseboard will have the rear
RJ45 serial port configured to support a DSR signal which is compatible with the Cisco*
standard.
For serial concentrators that require a DCD signal, the J5A2 jumper block must be configured
as follows: The Serial Port jumper placed in position 1 and 2. Pin 1 on the jumper is denoted by
an arrow directly next to the jumper block. The following diagram provides the jumper block pin-
out for this configuration.