A single data center does not require a system license. Cisco Webex Meetings Server provides an 90-day Evaluation Mode that allows an unlimited number of Host licenses. You must purchase and register licenses before the evaluation period expires.
The base deployment models are micro (50), small (250), medium (800) and large (2000). You can extend the system capacity of a large deployment from 2000 up to 4000 (extra large) ports. You can reduce the capacity of an extended system deployment, down to the base large deployment of 2000 ports. The Extended Capacity feature requires a license.
There is no trial period for a new Multi-data Center (MDC). You must purchase MDC licenses for your system size, before you join the data centers. The primary data center hosts the MDC licenses and typically runs the license manager. If you want to upgrade or grow an existing MDC system, you must first purchase the licenses for the correct version and size.