Yeastar N824 is a fully-fledged PBX that delivers advanced communications features of a large system to small office. Yeastar N824 maximizes cost-effectiveness with 8 CO lines, 24 analog extensions, 8 SIP extensions, 4 SIP trunks, and the ability to handle calls with your mobile phone.Built-in features also include:-Voicemail messages-Multi level auto attendant-Call recording capability-Timed condition routing-No licensing fees