Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
if you have your own private VOIP network, then using PBX u can connect to PSTN . India its not allowed to have a connection between PSTN and public VOIP networks if i am correct.
Check in your office telephone network .......you can get some info
There are three ways in which you can make a VoIP connection, each way having a different set of requirements and implications. The three ways are differentiated by what you have on each of the two communicating sides. There are Computer to Computer, Phone to Phone & Phone to Computer and vice-versa