Model 9143i IP Phone User Guide 1691. Click on Basic Settings->Preferences->General.2. The "Message Waiting Indicator Line" field is set to All lines by default. If required, changethe setting to a specific line by selecting a line from the list. Valid values are All and lines 1through 9.3. Click Save Settings.Incoming Intercom Call FeaturesIncoming IntercomBy default, the IP phone allows incoming intercom calls to be automatically answered withouthaving to set up an Icom key on your phone. The phone automatically plays a warning tone whenit receives an incoming intercom call. It also mutes the microphone. If the intercom call comes intothe phone while an active call is already present, the phone puts the active call on hold and answersthe intercom call.
