GNOME Panel AppletLinphone can be added to the GNOME panel. Right-click an empty area in thepanel, select Add to Panel, and select Linphone. Linphone is then permanentlyadded to the panel and automatically started on login. As long as you do not receiveany incoming calls, it runs in the background. As soon as you get an incoming call,the main window opens and you can receive the call. To open the main window tocall someone, just click the applet icon.8.1.2 Determining the Connection TypeThere are several different ways to make a call in Linphone. How you make a call andhow you reach the other party is determined by the way you are connected to the networkor the Internet.Linphone uses the session initiation protocol (SIP) to establish a connection with a re-mote host. In SIP, each party is identified by a SIP URL:sip:username@hostnameusername is your login on your Linux machine and hostname the name of thecomputer you are using. If you use a SIP provider, the URL would look like the follow-ing example:sip:username@sipserverusername is the username chosen when registering at a SIP server. sipserver isthe address of the SIP server or your SIP provider. For details on the registration proce-dure, refer to Section 8.1.5, “Configuring the SIP Options” (page 158) and check theprovider's registration documentation. For a list of providers suitable for your purpose,check the Web pages mentioned in Section 8.8, “For More Information” (page 165).The URL to use is determined by the type of connection you choose. If you chose tocall another party directly without any further routing by a SIP provider, you wouldenter a URL of the first type. If you chose to call another party via a SIP server, youwould enter a URL of the second type.Calling in the Same NetworkIf you intend to call a friend or coworker belonging to the same network, you just needthe correct username and hostname to create a valid SIP URL. The same applies if this156 KDE User Guide