Minolta Di151 Operator's Manual page 124

Using the Function Utilities
2) How to change a Mailbox ID
1. Press the Utility key 5 times.
2. Press '5' of the Numeric keys to select "MAILBOX RX".
3. Select a Mailbox number to delete with the
Numeric keys.
For example: Delete the ID of number 9 Mailbox.
4. Then the message appears as below.
5. Press the No/Clear key to delete the registered ID, then the
display appears the message as below.
RX OPERATION?
OK=YES / or 1-8
5 MAILBOX RX
MAILBOX NO.= _
SELECT 0-9
MAILBOX NO.= 9
SELECT 0-9
REGISTERED!
OK = YES
OLD M-BOX 9 ID = _
5-18
Utility
x 5
JKL
5
WXYZ
9
KEEP?
(DEL = NO)
No
C