Pin Features; Electronic Telephone Lock - Siemens Hicom 300E Operating Instructions Manual

This feature allows you to lock your extension by dialling your PIN, which
prevents unauthorised use of your extension. The PIN assigned to your
extension will be provided by your System Administrator.
Lock your Extension
Your extension will now be restricted to local or internal calls only.
Special dial tone will be heard to remind you that the feature is activated.
Unlock your Extension
Note:
You will still be able to receive calls when your extension is locked.
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PIN Features

Dial 21 and your PIN
Press the talk key.
Wait until the display shows
Press the end call key.
Dial # 21 and your PIN
Press the talk key.
Wait until the display shows
Press the end call key.