MMITE-760 User GuideAastra - 2568-004 97Appendix IITroubleshootingTroubleshootingThe following table represents the more common problems found with a phone, andprovides possible causes.Problem Possible CauseNo display • Check for dial tone• Check the connection to the phone jack• Check that the other phones in the system are operating• Check the setting of display contrastNo dial tone • Check the connection to the phone jack• Check the connection of the handset and/or the headset• Check that other phones in the system are operating• Check volume setting of handset, speaker, or headsetNo sound in thehandset• Check the volume setting of the handset, speaker, orheadsetCannot dial out of thesystem(External Calls)• Check that you have the rights to make external callsNo voice messagesreceived• Check your connection to the voice mail system• Check your welcome message or voice signature record onthe voice mail system• Check activation of call forwarding to your voice mailboxThe phone is notringing• Check the volume of the ring melody• Check Call Forward settings
