Software :: TCP - IP To GSM - PSTN Open Source Software ?

I am looking for TCP/IP to GSM/PSTN open source software/gateway.

my scenario is:I have a computer in City A with dial up modem and GSM modem and another computer in city B, I want to use my telephone line and GSM line of city A from B city over Internet. I mean I call people of city A with their local lines over internet does any body knows any good and complete open source solution that connect me to my gsm/pstn of computer in city A from city B over Internet.

I want to make a PC as VOIP to GSM/PSTN gateway.

I want it to have these features:

-VoIP to GSM Gateway and vice versa
-Protocol translator between the SIP and H323
-Gateway from your LAN to the Internet
-Small IP PBX
-SIP/H.323
-SIP proxy
-Up to 4 GSM channels
-Standard SIP/H.323 clients embedded in one hardware unit
-LCR according to free minutes and GSM providers
-SIP proxy Registrar for IP phones included
-Mobility Extension for SIP proxy users
-Intelligent incoming call routing
-DISA for incoming calls from GSM
-Top voice quality (EFR super sound)
-Easy way from Ethernet to Internet over GPRS with "dial on demand" function
-SMS sending and receiving (WEB interface and SMTP/POP3 protocols)
-Simple web based configuration
-CDR buffer for up to 500,000 records
-LOG and statistics saving