TelecomFM OneStream GFX is a universal system that can connect to an installed PBX as a call router from an existing corporate network to PSTN, VoIP and GSM, or as a stand-alone unit that replaces PBX.
From mobiSIP Android or iPhone: SIP Client iPhone is uniquely designed and developed to add the power of making voice over internet transfer protocol calls directly through the Android or iPhone. It’s developed by mobisnow.