AT&T 1080 - SYS EXT Mailbox; About System Extension Mailboxes

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Answering system operation
SYS EXT mailbox
About system extension mailboxes
If a 1080 telephone is an auto attendant, it can
be a system extension (SYS EXT) mailbox for 1070
and 1040 telephones in the system. When the
1080 phone is a SYS EXT mailbox, it can answer
calls transferred by the auto attendant system
and record caller’s messages for its SYS EXT
telephones. These messages are called extension
messages. Each extension message can be up to
one minute.
NOTE: If the 1080
phone is the SYS EXT
mailbox for other
extensions, it answers
transferred calls from
its extension telephones
with a preset outgoing
message. You can
neither delete nor
replace this outgoing
message.