Making and Receiving CallsIssue Possible Cause & Solution ReferenceI cannot make calls. • Your phone system/service has disabled service for your unit.→ On the Information Display screen (Page 49), if "Notregistered" is displayed in "Status", consult youradministrator or dealer.—• The phone number was entered incorrectly.→ Confirm that you have entered the phone number of theother party correctly.→ Consult your administrator or dealer.Page 29• The unit is downloading a firmware update.→ You cannot make calls while the unit is downloadingupdates. Wait for the update to finish, and then try makinga call.—• The phonebook list is being imported or exported.→ Wait a few minutes for the operation to complete.→ Confirm with your administrator or dealer.—I cannot make longdistance calls.• Your telephone service does not allow you to make longdistance calls.→ Make sure that you have subscribed to your telephonecompany’s long distance service.—The unit does not ringwhen a call is received.• The ringer is turned off.→ Press [ ] while a call is being received, or change theringer volume setting.Page 45While talking to an outsideparty, the line isdisconnected.• Your phone system/service may impose a time limit on outsidecalls.→ Consult your dealer to extend the time limit, if necessary.—Sound QualityIssue Possible Cause & Solution ReferenceThe other party cannothear my voice.• The unit is muted.→ Press [MUTE/ ] to turn off the mute feature. Page 35• If you are using the speakerphone, objects may be obstructingthe microphone.→ Do not obstruct the unit's microphone during calls. Keepyour hands, as well as common objects such as folders,cups, and coffee pots away from the unit during calls.—84 Operating Instructions Document Version 2013-03Appendix