AASTRA 4222 Office for BusinessPhone User Guide EN - Manual (Page 66)

Security
BusinessPhone – Dialog 4222 Office / Dialog 3211 & 3212 66
Security
Block extension
You can block your extension in order to prevent unauthorized
external calls. You can still make internal calls and you can also
receive incoming calls. *72#
Press to block your extension.
Verification tone. í
Press to finish the procedure.
Un-block extension #72*
Press.
z
Enter your Password.
Note: To change your password see chapter“ Change
Password” on page 62 #
Press to re-open.
Verification tone. Your extension is open for use. í
Press to finish the procedure.