BT BIG Button + - Manual (Page 28)

Important
After an incoming call, or after using the handset, your
Big Button + will check for any messages. When messages
have been left or you replace the handset leaving messages
unplayed there will be a delay of approximately 1 minute
before the message waiting indicator light flashes.
Note
The message waiting indicator is activated by an interrupted
dial tone which you can hear when you pick up your phone.
BT Select Services, such as Call Diversion and Call Barring
also use interrupted dial tone so therefore will cause the
message waiting indicator to flash even if no messages have
been left.
BIG Button + ~ 4th Edition ~ 15th April ’02 ~ 4380
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