AT&T LUCENT / AVAYA CALLMASTER IV PHONE TELEPHONE BLACK COMCODE 847933850 "disable mute cell" Questions

...Mute #*3888# BLUETOOTH Test mode #*7828# Task screen #*#8377466# S/W Version & H/W Version #*2562# Restarts Phone #*2565# No Blocking? General Defense. #*3353# General Defense, Code Erased. ...