Symptom Possible cause Solution
Display remains dark. Battery pack not activated. See “2.3 Handset activation” how to activate the battery.
Batteries not charged. Charge the batteries.
Handset is switched off. Switch on the handset (see “4.2 Switching the handset
on/off”).
No power. Check that the devices has the correct power supply.
No sound. Telephone cable incorrectly connected or
defective.
Check the connection of the telephone cable (see “2.1
Commissioning the base station”).
The line is engaged by a different handset. Wait until the other handset hangs up.
The symbol is flashing. Handset is out of range. Move closer to the base station with the handset.
The base station has no power. Check the power connection to the base station.
The handset is not registered to the base
station.
Register the handset to the base station (see “9.1
Registering an additional handset”).
The base station or handset
does not ring.
The ringer volume is off or too low. Set the ringer volume (see “4.16 Setting the ringer
volume on the handset”.
No connection despite good
sound quality.
The dialling mode is incorrect. Check the dialling mode (see “8.4 Setting the dialling
mode”).
Calls cannot be forwarded on a
PBX.
The flash time is too short. Set the device to a long flash time (see “8.2 The flash
key (R)”).
Telephone does not respond
when keys are pressed.
Programming error. Remove the batteries and then insert them again after
1 minute.
