... route,SMS functions,Caller's ID. GSM WIRELESS PBX GSM WIRELESS PBX Feature: PBXs, a popular technology ... s PSTN, which include fixed line PSTN, wireless CDMA PSTN, wireless GSM PSTN, NGN PSTN etc., are greatly ... Here are the main functions of TelePower’s wireless PBX and IP-PBX 1. Strong interface capacity ... cost. With IP-PBX, users can make international calls while enjoying local call payment, and make ...