[asterisk-users] chan_bluetooth, mobile handset as VoIP terminal?

[Brian Candler]

I have been looking at chan_bluetooth, so far being unable to make it
compile with Asterisk SVN trunk.

I was wondering about the different ways it can be used. What I have read so
far implies two possibilities:

1. Asterisk pretends to be a handsfree unit, and can use the cell phone
   for placing calls over the mobile network, or answer inbound calls from
   the mobile network.

2. Asterisk pretends to be a phone, and you can use a headset as a VoIP
   terminal (unfortunately only useful for receiving calls, as headsets
   don't have keypads)

However, the possibility which really interests me is:

3. Can I use my mobile phone as a terminal, originating calls over
   bluetooth via Asterisk, using the phone's keypad to dial? And answering
   inbound calls from Asterisk?

This makes my mobile phone into a cordless phone replacement - avoiding
mobile charges while at home, and being able to receive PSTN and VoIP calls
via Asterisk.

I notice BT's "Fusion" service appears to work in this way -
http://www.bt.com/btfusion/ - as it looks like you get a normal mobile phone
which can route VoIP calls via Bluetooth and DSL when in range of the base
station.

So the question is:
- has anyone got Asterisk working this way?
- what bluetooth profile would the phone need to support to do this?
- does that limit me to particular models of mobile phone?

If this is possible, it's not clear to me how the phone would know that I
wanted to set up a call over bluetooth rather than over the mobile network.
Would I need to load some sort of app onto the phone?

Thanks,

Brian.