The 4SWM (Data Module) daughterboard module provides 10/100 BASE-T interface and provides the Layer 2 switch functions when connected to the LAN. The 4SWM provides 4-Ports of PoE (Power over Ethernet) to provide power to IP Telephones, WAP's, other Ethernet devices. The 4SWM can only be installed in the slot provided on the MP10 card. When the 4SWM is used in conjunction with IP Telephony applications (IP Keysets, Wireless Handsets, or SPNet) there must be MGI Channels available. The MGI Channels are licensed separately.