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 Smart-UPS 3000 RM 2U LCD - UPS (rack-mountable) - AC 120 V - 2.7 kW - 3000 VA - Ethernet, RS-232, USB - output connectors- 8 - 2U - Black - with APC UPS Network Management Card | Dell USA
RS232 APC SMART UPS DATA CABLE - FOR 3G SU2200NET MODEL | eBay