Sony ID Telephone IT-ID500 Manual De Instrucciones página 26

Using visual message waiting service
If you subscribe to your
telephone company's message
service which includes this
feature, the display will show
that you have messages waiting
to be retrieved.
1 @ If you have messages
you have not subscribed to your This display will be cleared when you retrieve your messages.
telephone company's message
& If you do not have messages
The display will be as normal (see pages 20 and 22).
26 | Using as a Caller iD telenhone