Kyocera FAX System 12 Operation Manual page 239

Troubleshooting > Messages
Message
The phone receiver is off
the hook.
Box limit exceeded.
Checkpoint
―
Is [End] displayed on the
screen?
11-5
Corrective Action
Put down the receiver.
The specified box is full, and no
further storage is available. Job is
canceled. Select [End]. Try to
perform the job again after printing or
deleting data from the box.
Reference
Page
―
5-35