Basic OperationsYou can adjust the ringer volume of your handset according to the noise level of thesurrounding environment. The ringer volume can be adjusted using the menu or thepredefined shortcuts (left and right navigation keys) on the keypad when the handset isidle. The handset supports 5 different ringer volume levels. The default level is 3.For more information on adjusting the ringer volume using the menu, refer to Ring Tonessection.To adjust the ringer volume using the predefined shortcuts:1. Press or when the handset is idle.Press to decrease the ringer volume, or press to increase the ringer volume.2. Press the Save soft key to accept the change or the Back soft key to cancel.Note If the ringer volume is adjusted to the minimum, the icon will appear on the idlescreen.32Adjusting Ringer VolumeYou can lock the handset keypad to prevent keys from being accidentally pressed.To lock the keypad:1. Long press when the handset is idle until the LCD screen prompts themessage “Keypad Locked, Press and hold ‘#’ to unlock!”.The keypad is locked and the icon appears on the idle screen.You can still answer or reject incoming calls as usual. You can also end theanswered call by pressing .To unlock the keypad:1. Long press again until the LCD screen prompts the message “KeypadUnlocked”.The keypad is unlocked and the icon disappears from the idle screen.Note If the keypad is locked, only the emergency numbers can be dialed out. You must enterthe digits of the emergency number continuously. To make emergency calls, you shouldconfigure the emergency numbers in advance. For more information, refer to theEmergency Numbers section.Locking/Unlocking Keypad