8) Automatic download of configuration and upgrade packages
9) Maximum number of built-in analog extensions and analog external lines: 4/8/16/32/48
10) Support remote management, monitoring and operation and maintenance through Xunshi cloud service, support Xunshi network management system and third-party network management system (TR-069, SNMP) Compatible with Cisco CallManager/CUCM, Broadsoft, Microsoft Skype for 9) Business (formerly Lync), Huawei IMS, VoS, FreeSWITCH and Asterisk/Elastix and other business platforms