Shenzhen Cesller Technology Co., Ltd., founded in 1996, is one of the largest manufacturers of professional group phone system in China. Early in 1992, our company together with other competitors developed EC9315 Mini-PBX which causes a great stir in China. We also are the first manufacturer in developing the first mainstream Group Phone System products and Digital Key Phone in China. After several years of hard work, Cesller has continued to develop from small to large. Today we have a complete set of Group Phone Systems with 18 types from "2 CO lines 8 Ext" to "120 CO lines 480 Ext" and 6 types of Digital Key Phones to fully meet the enterprise voice communication requirements. Cesller is devoted to the technology innovation to meet customer ever-changing demands, providing customers around the world innovative and customized products and services to help customers