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AM-FM Transmitters and Bugs
APC Back Pro UPS cable
pinout
9 pin D-SUB male connector to the UPS
UPS
Signal Name
DB-9 Male
(UPS end)
DB-9 Female
(PC end)
PC
Signal Name
RX / Shutdown
1
via R=4k to 3
TxD, also connected via R=4k to 1 (DCD)
TX / AC Fail
2
2,9
RxD, RI
Common
4,9
5
GND
At the PC end pins 4,6,8 (DTR, CTS, DSR) shorted.
9 pin D-SUB female connector to the computer
Source:
www.pinouts.ru
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