NEC Univerge SV8100 VM8000 InMail System Manual page 198

Issue 1.0
Operation
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47-01-04 Non-Subscriber Message Length (Mbox Msg Length)
This option sets the maximum length (1~4095 seconds) of recorded
messages for:
Automated Attendant callers leaving a message or Quick Message in a
H
Subscriber Mailbox.
Outside callers transferred by an extension user to a Subscriber Mailbox.
H
By default, these types of messages are 120 seconds long maximum.

VM8000
Features