If you have a Hot-Desk that means that your desk phone is one that you log into to get your extension.
To log into your phone follow these instructions:
Press **2 or **1
Press *
Enter the extension that you are logging into
Press #
Enter your pin (It should be the same as your extension, if that does not work contact the Help Desk)
Press #
After that, you will be logged into your phone.
To log out of your phone follow these instructions:
Press **2 or **1
Press #
After that, you will be logged out.
Please note that logging into a phone will log you out of any other phones you had logged into.