Ericsson DT288 User Manual page 119

I hear a warning tone and the signal strength indicator is not shown.
What is wrong?
The cordless phone is not connected to the network. The cordless phone is
probably out of range. Bring the cordless phone back within range of the net-
work.
It is also possible that the cordless phone has not been subscribed or that the
subscription has been cancelled. It could also mean that a network other than
the one which you are close to has been selected. See "Subscribing to a net-
work" on page 97 and "Connecting to telephone networks" on page 94.
I hear a warning tone and the battery icon is flashing. What is wrong?
The battery is almost flat. Put the cordless phone in the charger to charge the
battery.
Reference 119