General Information7General InformationThe M155 DECT Messenger is a sophisticated cordless messagingdevice for use in professional healthcare and hospitality environments.The small device is easy to carry and provides the mobile user theoptimum in mobility, accessibility, flexibility and comfort.Besides a message device the M155 also offers the mobile userspeakerphone communication and it acts as a personal alarm device.The M155 is compatible with both traditional DECT and IP DECTsystems.Feature overviewYou can use the features of the NEC M155 to perform the followingtasks:Send and receive messagesSet up and receive incoming speakerphone callspersonal alarm device (either by sending an SOS alarm messageor setting up an SOS loudspeaking call)automatic update of the time and date settings when switching onthe M155Notice to the userThe M155 DECT Messenger described in this manual should only beused in combination with DECT systems delivered by NEC. To takeadvantage of all features described in this manual the country specificand network provider specific features should match the features of theNEC system.Please also use the other documentation supplied with the various partsof your telephone system.Cleaning your M155You can clean the M155 with a dry cloth or a soft, lightly moistenedcloth. Never use chemicals, detergents, cleaning materials or solventssuch as alcohol or benzine.