Cisco offers a comprehensive and smart way to maximize your investment in Cisco Unified Communications by offering software subscriptions, service, and support. The combination of Cisco Unified Communications Software Subscription and Cisco Unified Communications Essential Operate Service allows you to get the latest major, minor, and maintenance updates for Cisco software releases, as well as giving you access to online tools and resources that can help you solve problems quickly. Cisco simplifies everything about keeping your Cisco Unified Communications System current with the latest product enhancements and functions for IP telephony, conferencing, messaging, presence, mobility, and contact centers. – Webex Calling Common Area licenses Overage