APC - serial cable - RJ-45 to DB-9 - 6.6 ft - AP940-0625A - -
Network UPS Tools - APC's smart protocol
Amazon.com: APC AP940-1525A UPS Communications Smart-UPS Signalling Serial RS-232 Cable DB9 to RJ45 (RJ50) - Same as AP940-1525C and AP940-0625A But a Longer Cable : Electronics
UPS Communications Cable Smart Signalling 15' / 4.5m - DB9 to RJ45 - AP940-1525A | APC USA