It displays the connection between 
the handset and the base.The more 
the bars are shown, the better the 
connection is.
It indicates a received call in the call log.
It indicates an outgoing call in the redial list.
It flashes when there is a new missed call.
It remains steadily on when browsing the missed calls in call log.
It flashes when receiving incoming call. It remains steadily on during a call.
The speaker is on.
The ringer is off.
Answering machine: it flashes when there is a new message. It remains steadily on when the telephone answering machine is turned on.
If you are using a voice mailbox from your provider, this icon flashes when there is a new message.
It remains steadily on when the voice messages are already viewed in the call log.
The icon is not shown when there is no voice message.
* This is network dependent
It displays when you scroll up/down a list or increase and decrease the volume.
There are more digits on the right. Press REDIAL/C to read.