Subscriptions are monthly paid entitlements. They can be divided into two main groups;
In practice, subscriptions are purchased for a specific duration. For example; 6-months, 1-year, 3-years.
During operation:
If connection to the subscription server is lost, the IP Office system continues running with the existing subscription entitlements it has already received for 30-days.
If when connected, any subscription expires, the feature or features associated with the expired subscriptions cease operation immediately.