The Cisco Unified Communications 540 of the Cisco Unified Communications 500 series for small business, is a critical part of the Cisco smart business communications system. It is an affordable unified communications appliance that provides voice, data, voicemail, automated attendant, video, security, & wireless capabilities while integrating with existing desktop applications such as calendar, email, & customer relationship management (CRM) programs. This reference guide describes the specifications & capabilities of the Cisco Unified Communications 540 (UC 540).