S2400 User Manualno-available channel.Enable Last CallerRoutingWhether to enable the feature Last Caller Routing.When an extension is making an outbound call, the system willautomatically record the information, and when the dialednumber make an inbound call using the same line, this numberwill directly reach the corresponding internal extension.Keep Time How long you want to keep the Last Caller Routing records.Internal Ring Type Select the Ring tone type for internal calls.Inbound Ring Type Select the ring tone type for inbound calls.2) Web ServerS2400 supports web server responds to HTTP and HTTPS. By default, users couldaccess the Web GUI via HTTP (default port: 80). You can also access web via HTTPSif HTTPS is enabled.Figure 17-1 Web Sever3) Extension PreferencesYou can change extension preferences on this Section. There are 5 types ofextension range, including User Extensions, Ring Group Extensions, ConferenceExtensions, IVR Extensions, and Queue Extensions. Assign a specific range for eachtype will help to distinguish and manage those different extensions.You could change the default range or redefine it to meet your requirements. Theextension number should have at least 2 digits and at most 7 digits.Figure 17-2 Extension PreferencesBusiness HoursOn Business Hours page, you can create a list of times (Office Hours, Other Office