Cisco console server

This is example hardware configuration of console router

dhp1-co-con-r1#sh inventory
NAME: "CISCO2911/K9", DESCR: "CISCO2911/K9 chassis, Hw Serial#: FCZ********, Hw Revision: 1.0"
PID: CISCO2911/K9      , VID: V07 , SN: FCZ********
NAME: "High Speed Wan Interface card with 16 RS232 async ports(HWIC-16A) on Slot 0 SubSlot 0", DESCR: "High Speed Wan Interface card with 16 RS232 async ports(HWIC-16A)"
PID: HWIC-16A            , VID: V02 , SN: FOC********
NAME: "High Speed Wan Interface card with 8 RS232 async port(HWIC-8A) on Slot 0 SubSlot 1", DESCR: "High Speed Wan Interface card with 8 RS232 async port(HWIC-8A)"
PID: HWIC-8A             , VID: V02 , SN: FOC********
NAME: "C2911 AC Power Supply", DESCR: "C2911 AC Power Supply"
PID: PWR-2911-AC       , VID: V05 , SN: DCA********

Reference

CCNA Practical Studies: Gaining Access to Routers and Switches Cisco 2002