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Specifications 85
m 9-pin D connector
m Pin signals
1: (CD) UPS battery low (20%) <from UPS to Xserve RAID>
2: Not used
3: Not used
4: (DTR) handshake option <from Xserve RAID to UPS>
5: Ground
6: Not used
7: (RTS) reserved
8: (CTS) Line fail—switch to UPS battery <from UPS to Xserve RAID>
9: (RI) reserved
m Serial cable to UPS should be number 940-0020B (or comparable cable) for APC basic
signaling
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