1.) While at the phone in your office, press “Prog/Help” on the bottom left and then press 6.
2.) Press 2 to program the phone number you wish to alert into the system and follow the prompts. Once stored, it should kick you back to the menu you were at when you pressed 6.
3.) Press 1 to tell the system what to do if you get a message. Press 1 again to set it to notify your phone you stored in the previous step… to turn this off later, you’d press 5 instead to disable it.