Hi!
I have an application written in Delphi/Win32 and I need to add functionality allowing a phone-call via SIP to be made.
I am therefore looking for a SIP library that will provide me with methods / functions to:
A) Place a call B) Transfer a call C) Detect and answer an incoming call.
I don't need any fancy graphicy phone thingy I just need a library that will do the clever SIP stuff deal with codecs etc and an API to it! Win32 and Linux compatibility would be good, but otherwise Win32 is my main priority right now.
The library can be commercial (I don't mind paying something reasonable... open-source even better!) but should not require me to pay Per-Seat royalties. I can find plenty of H.323 solutions but I need a SIP one.
Also I wonder about codecs! Is G.711 generally good enough to make a call to a local SIP/PSTN gateway or do I need something better? But will this cost?!
Any help much appreciated!
Cheers,
Tim