Panasonic KX-TG7841BX, KX-TG7841UE Can make and answer cellular calls but cannot hear a sound

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Useful Information

Problem

Noise is heard, sound cuts in and out.

The handset or base unit does not ring.

I cannot make local calls with the handset or base unit using a cellular line.

I cannot make or answer cellular calls with the handset or base unit.

I can make and answer cellular calls but cannot hear a sound.

I cannot switch cellular calls from the unit to the cellular phone.

I cannot make a call using the landline.

Cause/solution

RYou are using the handset or base unit in an area with high electrical interference. Re-position the base unit and use the handset away from sources of interference.

RMove closer to the base unit.

RIf you use a DSL/ADSL service, we recommend connecting a DSL/ADSL filter between the base unit and the telephone line jack. Contact your DSL/ADSL provider for details.

RThe ringer volume for landline is turned off. Adjust the ringer volume (page 34, 37).

RThe ringer volume for cellular line is turned off. Adjust the ringer volume (page 33, 36).

RWhen one handset is selected to ring for cellular calls, other units do not ring. To change the selection, see page 17.

RNight mode is turned on. Turn it off (page 38).

RYou need to add your area code when making cellular calls. Store your area code in order to automatically add it to the beginning of the 7-digit phone number when making cellular calls (page 17).

RDepending on the cellular phone’s compatibility, you may not be able to make or answer cellular calls even if the cellular phone is connected to the base unit.

RMake sure that the CELL 1 or CELL 2 indicator lights up and the cellular phone is connected to the base unit (page 16).

RIf someone is talking on a cellular call or using the headset, you cannot use the cellular feature. There can be only one active Bluetooth connection at a time.

RThe cellular phone is being used separately from your system.

RThe Bluetooth technology on your cellular phone may not be functioning normally. Turn off and on your cellular phone.

RDisconnect and reconnect the base unit AC adaptor and try again.

RYour cellular phone may not support this feature. Refer to the operating instructions of your cellular phone.

RThe dialing mode may be set incorrectly. Change the setting (page 13).

RThe cellular line only mode is turned on. Turn it off (page 16).

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Contents KX-TG7841UE Thank you for purchasing a Panasonic productTable of Contents Additional/replacement accessories Accessory informationSupplied accessories Your Bluetooth headset*1 1 max Bluetooth devicesYour Bluetooth cellular phone*1 2 max TrademarksFor your safety For best performance Important safety instructionsBattery Base unit location/avoiding noiseRoutine care SpecificationsOther information Battery charging Setting upBattery installation ConnectionsIcon Battery level Intelligent eco modeBattery level Operation Operating timeMholdn ControlsMoffn Mflashnmcall Waitn Mnoise Reductionn Handset display items Display/IndicatorsBelt clip Cell 1/CELL 2 indicators on the base unit Base unit display itemsDate and time Initial settingsDialing mode Unpairing a cellular phone Link to cell featurePairing a cellular phone MoffnSelecting which unit receives cellular calls Link to cell settingsRing as cell mode Auto connection to the cellular phoneWhen you use the landline again Cellular line only mode If you do not use the landlineConnecting/disconnecting the cellular phone manually Storing your area code for a local call Changing the Bluetooth PIN Personal Identification NumberCellular line selection Msaven a MexitnMaking cellular calls Making landline callsHold Useful features during a callAnswering calls Flash for landline calls Caller ID service usersHandset noise reduction For call waiting or Call WaitingMbN Transfer to cell a Using the other line during a conversationCall share To hold the 2nd call Mmenun a MbN Hold a Mselectn Power back-up operation for landlineMaking calls during a power failure Answering calls during a power failure Making a call using the redial listMredialn Adjusting the speaker volumeMaking a cellular call using the redial list MexitnFor call waiting or Call Waiting Caller ID service users While the base unit is ringing for an incoming callTo switch between calls, press Mcall Waitn MZNErasing the character or number GroupsCharacter table for entering names Key CharacterSearching by group Searching by first characterSearching by query MoknChain dial Editing entriesErasing entries Erasing an entrySpeed dial Handset Programmable settingsDisplay menu tree and direct command code table Main menu Answering deviceErase all msg Settings Ring count RingsPlay all msg Greeting Record greetingLink to cell Connect BluetoothDevice *3 Ringer volume Add new DisconnectAlarm Once Settings Auto connect MinMode Cell line select Cellphone 1*3 Time adjustment*9 Caller ID autoSet tel line *2 Set dial mode Pulse Time adjustment *9 Caller ID autoVoice mail *2 Store VM access# Set date & time Date and timeBase unit Interrupt tone *6, *10 On Off Main menu Initial settingNight mode On Off Start/End Talking CID *6 On OffTurning night mode on/off AlarmNight mode Special programmingMcidn Storing unwanted callersFrom the caller list Handset MbN Call block a Mselectn MbN Yes a MselectnViewing/editing/erasing call block numbers Setting the first ring for the call block listBlocking incoming calls without phone number AreaTalking Caller ID Using Caller ID serviceCaller ID features Ringer ID for handsetViewing the caller list and calling back Using a cellular line HandsetCaller list MbN Group a MselectnTo erase your area code Editing a caller’s phone number before calling backErasing selected caller information Erasing all caller information Mselectn MoffnCopying phonebook from a cellular phone phonebook transfer Setting conversion codesWhen Select mode menu is displayed To copy from other cellular phones not pairedConnecting/disconnecting a headset Pairing a headset to the base unitOperating a Bluetooth wireless headset using a landline Unpairing a headsetTo switch to the base unit Press MZN on the base unit Switching between the base unit and your headsetAdjusting your headset receiver volume Answering landline calls with your headsetGreeting message Answering system for landlineTurning the answering system on/off Memory capacity including your greeting messageListening to messages using the base unit Operating the answering system Listening to messages using the handsetErasing all messages Editing the number before calling backAudible message alert Alerting featuresAdvanced new message New message alert by a callRemote operation Remote access codeUsing the answering system RemotelyVoice guidance Answering system settingsRemote commands Turning on the answering system remotelyCaller’s recording time Selecting Greeting onlyTo erase the voice mail access number Voice mail service for landlineStoring the voice mail VM access number Listening to voice mail messagesTransferring calls, conference calls IntercomHandset locator Making an intercom callTo complete the transfer Press MZN Answering a transferred callMbN Stop conference a To establish a conference call Press MconfnWall mounting Display message Error messagesCause/solution Problem TroubleshootingUse rechargeable battery General useBattery recharge Making/answering calls, intercomCan make and answer cellular calls but cannot hear a sound Caller ID/Talking Caller ID Using Bluetooth devices Bluetooth PIN Answering systemDeregistering a handset Liquid damageRegistering a handset to the base unit Index For your future reference