The internal power supply supports input voltages between 100 and 240 VAC.
The internal power supply is an auto-ranging unit.The connectors are located at the back of the switch. You can provide power to a switch by using the internal power supply, the Cisco RPS 675 Redundant Power System.
#Cisco 2950 manual configuration Patch
MT-RJ Patch cables for Cisco Catalyst 2950SX 24 Switch