Issue Possible Cause & Solution ReferenceSound cuts out; I can hearmyself through thespeaker.• You are too far away from the microphone.→ Try speaking closer to the microphone. —• The environment is not suited to speakerphone calls.→ Do not use the unit within 2 m (6.6 ft) of projectors, airconditioning devices, fans, or other audible or electricalnoise emitting devices.→ If using the unit in a room with windows, close the curtainsor blinds to prevent echoes.→ Use the unit in a quiet environment.—• The unit was moved during a call.→ Do not move the unit while on a call. —• Objects are obstructing the microphone.→ Do not obstruct the unit during calls. Keep your hands, aswell as common objects such as folders, cups, and coffeepots away from the unit during calls.—• The other party is using a half-duplex speakerphone.→ If the other party is using a half-duplex speakerphone,sound may cut out occasionally during calls. For bestperformance, the other party should use a full-duplexspeakerphone.—• Just after a call begins, the unit may not have yet adjusteditself to the call’s environment.→ Just after a call begins, take turns with the other partytalking to each other. The unit will adjust itself inaccordance with the call environment so that both you andthe other party can hear each other as clearly as possible.—Phonebook ListIssue Possible Cause & Solution ReferenceI cannot add or edit entriesto the phonebook list.• The phonebook list is full.→ Delete any unnecessary entries. The maximum number ofentries in the phonebook list is 1,000.Page 39Bluetooth HeadsetIssue Possible Cause & Solution ReferenceI cannot have aconversation using theBluetooth headset.• Make sure that the headset is properly registered to the unit.• Make sure that the headset is properly charged by followingthe instructions in the headset's documentation.—Document Version 2014-11 Operating Instructions 99Appendix