SOT600KII-IPPBX (8U) Digital Group Telephone Switch Product（Capacity: Analog extension FXS/2B+D digital extension/analog relay FXO support: 16-208 lines (any combination),SIP extension: 128-288 licenses.PCM digital relay E1; 1-4 PRI or 7 or 1).It is a highly innovative new generation enterprise level TDM circuit+IP fusion communication system. It is equipped with advanced and powerful hardware platform and revolutionary software functions, with convenient scalability, providing a breakthrough solution for small and medium-sized enterprises to integrate traditional program-controlled switches with fiber optic networks, IP audio and video communication, data communication, paperless fax, collaborative meetings, mobile office and security monitoring, and other comprehensive application requirements. It allows users to fully enjoy the panoramic communication applications, easy operation, high reliability and high cost-effectiveness brought by cutting-edge technologies in the current market. Support mixed insertion of analog extension FXS, analog relay FXO, 2B+D digital dedicated extension, and SIP digital extension.