Gokul Blog — A conversation on VoIP, IMS, Cisco and Just about Anything

Deeper analysis of VoIP

Third Party Voice Control

Posted by tggokul on August 30, 2007

There are enough mechanisms and more ( like JTAPI, TAPI) etc which allow you to write applications that can do third party call control. My question is, are there mechanisms to do third party voice control?

Let’s say that there are two ip phones which are controlled by your centralized IP PBX. Now I can write applications that can do a makecall(), answercall() etc on these two phones. But media will be to/from these phones. What I want to do is makecall() from one phone, but have the media terminated somewhere else.

I don’t want to connect and then do a transfer, that would be a round-about way. But having said that, if there are no other ways to do it, then this would be the way to take. Let’s come to the scenario where this would be useful ( would this be the next killer app?)

Let’s say I have a dual-mode mobile phone with wifi and let’s say that termination to a TDM line ( mobile/landline) is cheaper or has better quality through the GSM network. Or it could be as simple as I have way too much free minutes available during the weekend. Now, it is obvious I would be carrying the phone all the time. What if my wife is sitting somewhere else and wants to call somebody through my mobile GSM connection? Assuming she is connected on the Net, she should be able to reach the wifi enabled side of my phone and should be able to make a call out through the GSM world. But the media coming in should go to the softphone she has in her desktop/laptop rather than to the mobile I have.

The media will take the following route. Laptop->wifi side of mobile->GSM network->end user and vice-versa. This is more like a three party conferencing, only thing me sitting in the middle am not doing it, rather the third party is doing it. This would be the reason why I am looking for ways to do third party Voice control.  

You don’t need things like Skypeout minutes and you don’t have to be with the phone to make/receive calls. Say, I forgot to carry my phone. No worries, all I need is an internet connection and I can still use my phone. Something like a pc-anywhere on my mobile phone, only simpler and easier.

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