To manage the POE settings on a Cisco Catalyst switch, follow the steps below. Note: the exact steps may vary depending on the specific model and firmware version of your Cisco Catalyst switch.

Turn PoE off for one switchport:

1. Open Putty
2. Enter the host name (or IP address)
3. Log into the Switch
4. Enter global config mode

conf t
int fa0/1
power inline never

Turn PoE off for switchport range:

1. Open Putty
2. Enter the host name (or IP address)
3. Log into the Switch
4. Enter global config mode
5. Enter the config below

conf t 
int range fa0/1 - 24
power inline never