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EIA/TIA-561pin layout.Serial interface via 8-pin
Appendix A: Cable Specifications and Information - Cisco
Serial Port Pinouts - Local Manager User Guide
Tripp Lite USB to RJ45 Rollover Console Cable (M/M) - Cisco Compatible, 250 Kbps, 15 ft., Black - serial cable - 15 ft - - U009-015-RJ45-X - USB Adapters - CDW.com
File:DE-9 to 8P8C console cable pinouts.svg - Wikimedia Commons
Cisco console cable-usb serial cable
Marrold's Blog: Bodging an RJ11/RJ12 Console Cable for use with an APC 7922 (And possibly others)