Toshiba 3010-SD phone change name display

SOURCE: Change name display on Toshiba DKT2020-SD

I am assuming you want to change the display to read another persons name, or blank. If that is correct:
Press a [DN](labeled intercom on my system) + #621.
That opens edit mode.
an example. My phone reads "MARK 29"
where Mark is the user, 29 the extension. John replaced
Mark, so target is "JOHN 29"
so intercom # 6 2 1 puts me in edit mode
# toggles between alpha/numeric
* moves the cursor, I repeat * until cursor is under M
Hit the 5 key, changes the M to J and moves cursor under the A.
Hit the 6 key, the A changes to M, and the cursor moves to under the R. I hit 0 which changes the M to N. I hit 0 again, the N changes to O.
Hit the 4 key, the R changes to G. Hit 0, G changes to H.
Hit the 6 key, K changes to M. Hit 0, that changes the K to M. Hit 0, M changes to N.
We are done, as the extension number stays the same. Hit spkr key to leave edit mode.
Hope that helps!
# toggles alpha/numeric

SOURCE: Change name display on Toshiba DKT2020-SD

Press "intercom" button, then #621. Use * to move the cursor all the way to the left. Use the # sign to change from numbers to Alpha. For example: You want "N", but the "M" comes up. Press the "0" to toggle to additional letters on same number key. For a SPACE, use the number 1 and toggle to get a space.

SOURCE: Toshiba DKT 3010 - SD

log into mail box 999 and use security code 999997 or just 997 and press menu 8 for admin features.I would suggest reading your guides and manuals

SOURCE: How can I change the name on the display of the Toshiba phone?

By dialing intercom #621 and pressing the * key to move cursor left. press pound changes to letters and 0 is toggle. Your manual and good guides are here
http://guides.idacomusa.com/

SOURCE: Programming a Name in Toshiba DKT3020-SD

To edit display name on LCD DKT3020-SD.

Follow this sequence:

Mode
Scroll
Enter passwork - 0000 is default
Hold
Hold (again)
DN ID (This is your phone extension #)

Old name should now be displayed. Hit page button to delete letters, scroll button for space.

Use characters for the the associated number key to enter desired name. For example if you want an "F" you would hit the 3 button 3 times. After your name is entered, press hold. Pick up and put down receiver.