I dream for an Android app which can make mobile serve as a GSM gateway. In many scenarios I need such an app.
- I am abroad but I want to make calls to and receive calls from the UK contacts. I can leave the mobile in the UK on a charger, then connect to the mobile via Internet when abroad, via SIP protocal probably.
- Call plan of mobile phone contract has unlimited calls included, so I perfer to make calls via GSM network. But I also like to talk on the desktop IP phone, which make my business look professional.
In other words, I need an IP PBX app for Android, but no one made it available. Many apps of SIP client are on the marketplace, but no SIP server.