... IP-PBX Feature: PBXs, a popular technology in the past 20 years, were welcome by group customers, which offered best solutions ... main functions of TelePower’s wireless PBX and IP-PBX 1. Strong interface capacity: can access ... to PSTN, CDMA, GSM, and IP networks.2. Optimized call route: can access to ... networks, best solution to call cost. With IP-PBX, users can make international calls while ...