APC ProtectNet standalone surge protector for Serial RS232 lines (9 pin male to female) - APC Lithuania
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
APC POWERCHUTE PLUS BLK RPLC CABLE FOR 2WAY COM | TELIA INMICS-NEBULA OY
APC UPS software mod using rs232 com port windows 10 - YouTube
Db9 Serial To Rj12 Rs232 To Rj11 Adapter For Apc Pdu Cable 940-0144a - Pc Hardware Cables & Adapters - AliExpress
940-0299A APC Serial Data Transfer Cable Serial for Network Device Ups 1 x DB-9