System Configuration 3-25Note: Enabling Closed System Mode on your wireless Gateway provides another level of security, since yourwireless LAN will no longer appear as an available access point to client PCs that are casually scanning for one.Your own wireless network clients, however, must log into the wireless LAN by using the exact SSID of theNetopia Gateway.In addition, if you have enabled WEP encryption on the Netopia Gateway, your network clients must also haveWEP encryption enabled, and must have the same WEP encryption key as the Netopia Gateway.Once the Netopia Gateway is located by a client computer, by setting the client to a matching SSID, the clientcan connect immediately if WEP is not enabled. If WEP is enabled then the client must also have WEP enabledand a matching WEP key.Wireless client cards from different manufacturers and different operating systems accomplish connecting to awireless LAN and enabling WEP in a variety of ways. Consult the documentation for your particular wireless cardand/or operating system.Wireless Multimedia (WMM)Wireless Multimedia is an advanced feature that allows you to prioritize various types of data travelling over thewireless network. Certain types of data that are sensitive to delays, such as voice or video, must be prioritizedahead of other, less delay-sensitive types, such as email.Wireless Multimedia implements wireless Quality of Service (QoS) by transmitting data depending on Diffservpriority settings. See “Diffserv Options” on page 2-22. These priorities are mapped into four Access Categories(AC), in increasing order of priority:• Background (BK),• Best Effort (BE),• Video (VI), and• Voice (VO).It requires Wireless Multimedia (WMM)-capable clients, usually a separate feature enabled at the client networksettings, and client PC software that makes use of Differentiated Services (Diffserv). Refer to your operatingsystem instructions for enabling Diffserv QoS.