Operation Manual

Table Of Contents
61BusinessPhone Cordless DT400/DT410/DT420/DT430
Security
Security
You can block your extension in order to prevent unauthorized use
of your telephone, e.g. if your external calls are placed on a specific
account number.
Block extension
T
Press
*72#
Dial to block your extension
Verification tone.
Un-block extension
T
Press
#72*
Dial
z
Dial your password
#
Press to re-open
Verification tone. Your extension is open for use.