... new PSTN.TelePower has been working on R&D and manufacturing of PBX for 8 years. One year ... capacity: can access to PSTN, CDMA, GSM, and IP networks.2. Optimized call route: can access ... different called numbers, which keep caller number and called number always in the same networks, best ... make international calls while enjoying local call payment, and make free call for company’s internal communication ...