• 16 to 104 phone station support
• Four to 12 analog trunks or two to 6 BRI digital trunks
• Optional one or two T1/E1 voice interface (PRI and CAS)
• Integrated voicemail
• 32 or 64 hours voicemail storage
• Automated attendant
• Integrated business productivity applications
• Integrated security
• Music on hold
• Wireless support with the Cisco AP 500 Series Wireless Access Point
• Simple system configuration and management

Series	Cisco Product	Cisco Small Business Pro Series	Cisco Small Business Pro Series
Model	Cisco Unified Communications 520	Cisco Unified Communications 540	Cisco Unified Communications 560
Feature Highlights	Eight to 64 IP phone station support Four to 8 analog trunks or two to 4 BRI digital trunks Optional single T1/E1 voice interface (PRI and CAS) Integrated voicemail 16 hours voicemail storage Automated attendant Integrated business productivity applications Integrated security Music on hold Optional on board wireless access Simple system configuration and management	Eight to 32 phone station support Four to 8 analog trunks or two to 4 BRI digital trunks Optional single T1/E1 voice interface (PRI and CAS) Integrated voicemail 32 hours voicemail storage Automated attendant Integrated business productivity applications Integrated security Music on hold On board wireless included Simple system configuration and management	16 to 104 phone station support Four to 12 analog trunks or two to 6 BRI digital trunks Optional one or two T1/E1 voice interface (PRI and CAS) Integrated voicemail 32 or 64 hours voicemail storage Automated attendant Integrated business productivity applications Integrated security Music on hold Wireless support with the Cisco AP 500 Series Wireless Access Point Simple system configuration and management