Question : Used Cisco Cables 530MT Console ?
Is this compatible with a 2821 Router?

http://www.diablocable.com/cab-ss-530mt-cisco-compatible-male-dte-to-smart-serial-rs-530-cable-10-ft-72-1434-01.html

cisco cables

Best answer:

Answer by MrTECHguy
The newer style cables work with Cisco router modules including the popular router models 2801, 2811, **2821, 3825, 3845, 3640, 2621, 1721. The 26-PIN Smart Serial cable is used to connect to Cisco WAN Interface Cards including WIC-2T and WIC-2A/S. At the opposite end of this cable is the RS-530 DB-25 male DTE interface.
Good Luck