CISCO C3KX-NM-1G=

CATALYST 3K-X 1G NETWORK ACCS MODULE

The switch has one hot-swappable network module that provides SFP and SFP+ uplink ports to connect to other devices. You must insert the network module during switch operation. Operating the switch without a network module is not supported. A blank module is available. The switch generates logs when you insert or remove a network module with SFP ports.