The Cisco EtherSwitch Network Module (NM) has sixteen 10/100 switched Ethernet ports, with options for in-line power and a single Gigabit Ethernet port. The 16-port Cisco EtherSwitch NM is a modular, high-density network module that provides line-rate Layer 2 switching across Ethernet ports using Cisco IOS Catalyst Software. Expected features such as port autosensing, QoS and VLAN support from 802.1P and 802.1Q standards, and 802.1D Spanning Tree protocols are standard on the EtherSwitch module.The Cisco EtherSwitch Network Module is available in a 16-port 10/100BaseTX switch with an in-line power and Gigabit Ethernet support version. The in-line power Cisco EtherSwitch NM can power Cisco IP phones or Cisco wireless access points. In-line power requires an external power supply.