APC non-standard serial cable details.
APC 940-0625A
These are used with the newer models such as the SMT series. One end is a 9-pin female serial connector, the other a 10-pin RJ50 connector (like an Ethernet plug but with two more pins).
In the 9-pin connector pins 1 (DCD) and 4 (DTR) are connected together, as are 7 (RTS) and 8 (CTS).
1 \
2 | 2 Black
3 | 8 Brown
4 /
5 7 Red
6
7 \
8 /
9
S 4 Black
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