📔Terms and Acronyms🔧Initial Setup and Licensing🔑Assigning Access Privileges🎟️Class of Service (COS)🧑💻User and Services ConfigurationGroup ProgrammingEmbedded Voice MailCall HandlingSession Initiation Protocol (SIP) TrunksAutomatic Route Selection (ARS)IP NetworkingSystem Data Synchronisation (SDS) and Clustering2️⃣ResiliencyAdvanced ARSNetwork Zones🧰Maintenance and Troubleshooting