173. Basic operations.To de-register a handset: 1. Press to enter the main menu.2. Select ->Registration->De-reg. Handset.3. Enter the system PIN (default: 0000).4. Press the Done soft key.The LCD screen displays the names of the handsets registered to the same base station.The name of the handset itself is highlighted and followed by a left arrow.5. Press or to highlight the desired handset name, and press the OK soft key.The LCD screen prompts “De-register Handset”.6. Press the Yes soft key to de-register the handset or the No soft key to cancel.1. Press to enter the main menu.2. Select ->Registration->Select Base.The LCD screen displays all base stations the handset registered to and the Bestbaseoption (if the handset is registered to more than one base station). The radio box of thecurrently used base station is marked. You can select Bestbase to search for the basestation with the best signal strength.3. Press or to highlight the desired base station or the Bestbase option, andpress the Select soft key.The handset begins to search for the base station. After successful connection, thehandset plays a warning tone and prompts “Base selected successfully!”.You can press Highlight the base station the handset registered to and then press theRename soft key to rename the base station name.To select the base station:3.2 Basic network settings. The base station attempts to contact a DHCP server in your network to obtain the validnetwork settings (e.g., IP address, subnet mask, gateway address and DNS address) bydefault.If the base station cannot contact a DHCP server for any reason, you need to configurebasic network settings manually.1. Press to enter the main menu.2. Select ->System Settings->Network.3. Enter the system PIN (default: 0000).4. Press the Done soft key.5. Press or to select Static from the IP Address Type field.6. Enter the valid values in the IP Address, Subnet Mask, Default Gateway, PrimaryDNS and Secondary DNS fields respectively.7. Press the Save soft key to accept the change.To configure basic networksettings manually: