Cisco RS 530 Serial Cable DTE Male to Smart Serial 10 Feet For Cisco 2811 Router is designed for the Cisco 7000 family, Cisco 4000 series, 3600 series, 2500 series, 1600 series, Cisco access servers, and AccessPro PC cards. This cable has a male DB-60 connector on the Cisco end and a male DB25 connector on the network end.