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108 Sun Fire 280R Server Owner’s Guide • January 2001
The preconfigured RSC back panel ports provide the following connectors:
■ One RJ-45 connector for connecting a Category-5 twisted-pair Ethernet (TPE)
cable, see “Reference for the Twisted-Pair Ethernet (TPE) Connector” on page 206
■ One standard Personal Computer Memory Card International Association
(PCMCIA) modem pop-out RJ-11 connector
All RSC connection ports can be used simultaneously. The modem supports regular
asynchronous serial protocol, and can also support the Point-to-Point Protocol (PPP).
When running PPP, a standard internet TCP/IP 10-Mbps protocol stack is available
over the modem interface.
RSC Jumpers
The following table describes the RSC flash PROM jumper addresses, functions, and
settings. Default jumper settings are marked with an asterisk.
Note – Never change RSC card address J0502 default jumper setting, as the RSC
card will not boot.
RSC Monitoring
The RSC card contributes significantly to improvements in environmental
monitoring. The Sun Fire 280R system RSC monitors the following devices or events:
■ Power supplies
■ System keyswitch
■ System fans
■ CPU module(s) temperature(s)
■ System ambient temperature
Address Function Shunt on Pins Description
J0403 FRU SEEPROM access P1-P2 Write enable*
P2-P3 Write protect
J0501 Flash PROM boot selection P1-P2 Normal booting*
P2-P3 Not used
J0502 Flash PROM mirror P1-P2 Not used
P2-P3 Disable mirror*