... free. Fax function: sent fax easily by computer. IP-PBX Feature: PBXs, a popular technology in the ... 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 different ... always in the same networks, best solution to call cost. With IP-PBX, users can make international calls ...