... functions,Caller's ID,Many more other functions as traditional PBX. PBX Feature: PBXs, a popular technology in the past 20 years ... .Here are the main functions of TelePower’s wireless PBX and IP-PBX 1. Strong interface capacity: can access to PSTN, CDMA ... make international calls while enjoying local call payment, and make free call for company’s internal communication between different cities.3 ...