Small Business Unified Communications 320 with 4 FXO, Features: 1. IP-based telephony supporting Cisco SPA 300 and SPA 500 Series IP Phones, 2. SIP trunking support for clear, high-quality voice services, 3. Interoperable with up to 12 public switched telephone network (PSTN) analog lines (FXO), 4. Includes licenses for up to 24 phones (maximum 9 analog phones/fax), 5. Voicemail and automated attendant, 6. Voice to email notification 7, 4-port Gigabit Ethernet (1000 Mbps) switch with VLAN support, to connect devices or expand, 8. Gigabit Ethernet WAN port to connect your office to the Internet, 9. Built-in 802.11n wireless access point, enabling employees to stay connected to voice or data as they roam around the office, 10. Simple-to-use web-based configuration utility for easy deployment.