AASTRA DT590 for MD Evolution User Guide EN - Manual (Page 86)

Voice Mail Services
MD Evolution – Cordless DT590 216
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Press to end this service.
Your extension returns to idle status.
The non-consulted messages remain classified as new messages,
while consulted messages are automatically archived.
The icon indicating new messages will still be displayed on your
extension if any non-consulted voice messages remain. On the
other hand, if you have consulted all of your mailbox messages,
your extension is automatically un-notified.
Note: Typically, new messages are saved for a period of 30
days. Archived messages are typically saved for 7 days,
after which they are automatically erased
Automatic Call-Back from Voice Mailbox
Message
When you are consulting a voice message, you also have the
option of automatically calling the number that the system
automatically saved when the caller left the message.
This may consist of an internal or external calling party, according
to his/her identification provided by the ISDN network (or
equivalent).
To do this, while listening to a message:
¿
Simply dial “0”.
The person who left the message is then automatically called and
the call is established just as if you had manually dialled the internal
or external party's number.