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C-2 SPARC Enterprise M3000 Server Service Manual • November 2009
C.1 Serial Port
C.2 UPC Port
TABLE C-1 Serial Port
Pin assignment Pin number Signal name Input/output Description
1 RTS Output Request to Send
2 DTR Output Data Terminal
Ready
3 TXD Output Send Data
4 GND --- Ground
5 GND --- Ground
6 RXD Input Receive Data
7 DSR Input Data Set Ready
8 CTS Input Clear to Send
TABLE C-2 UPC Port
Pin assignment Pin number Signal name Input/output Description
1 ER --- ---
2 NC --- Not connected
3 NC --- Not connected
4 NC --- Not connected
5 SG --- Ground
6 *BPS Input UPS hardware
error signal
7 *BTL Input Battery end of
discharge warning
signal
8 NC --- Not connected
9 *ACOFF Input Power failure
detection signal
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