[Asterisk-Users] GSM phones, bluetooth and general happiness

[Jay Milk]

It's close -- it still requires an FXO port, and is probably not
inexpensive itself.  So between the FXO port and the device, you're
probably in for it at $200 or so.  I can get away cheaper with a
cell-socket.  I'd prefer a bluetooth dongle (1) because of cost, and (2)
because of the sheer elegance of the solution:  No reason to convert
audio back and forth several times, no reason to generate ring voltage
or detect DTMF.  Cell-phone is digital, Asterisk is digital, let's cut
out the analog.

> -----Original Message-----
> From: Mitchel Constantin [mailto:mitcheloc at gmail.com] 
> Sent: Friday, September 24, 2004 12:22 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] GSM phones, bluetooth and 
> general happiness
> 
> 
> Our prayers....answered? (http://www.phonelabs.com/prd_blue01.asp)
> 
> mitchel
> 
> 
> On Thu, 23 Sep 2004 12:10:11 -0500, Jay Milk <jay at skimmilk.net> wrote:
> > When I installed my first home-PBX three years ago, I was 
> looking at 
> > "cellsockets" -- devices which will accept certain cellular 
> phones and 
> > provide an RJ11 jack, generating the ring-voltage and recognizing 
> > DTMF, which in turn makes your cell-phone look like a CO 
> line.  Pretty 
> > cool stuff, in theory, but it just didn't seem to be worth 
> the cost, 
> > especially since it locks you to a particular cell-phone.
> > 
> > Since then, I've moved to Asterisk.  I looked at at 
> cell-sockets again 
> > recently, but they haven't really gotten any cheaper... And 
> on top of 
> > that, I'd now require a precious FXO interface for *.
> > 
> > I looked at some developer documentation for my particular 
> phone (S/E
> > T610) while connecting it to my PC via Bluetooth.  For 
> those who are 
> > unaware, all GSM phones have a built-in set of AT modem 
> commands.  Not 
> > surprisingly, I was able to place calls as well as receive 
> > ring-indicators, caller-id information and call-progress 
> information 
> > via the virtual serial port that the phone provides over 
> bluetooth.  
> > But what's more, I was also able to utilize my PC as a handsfree 
> > speakerphone -- and all this over bluetooth.
> > 
> > As I see it, all the pieces are available -- we got full phone 
> > control, some form of digital audio going back and forth, 
> > call-progress reporting.  I know there's at least one 
> bluetooth stack 
> > for linux, so
> > *technically* we're "there", no?
> > 
> > I foresee a chan_blue which allow Asterisk to utilize a 
> bluetooth/GSM 
> > cellular phone as a CO line, connecting by nothing more than a $5 
> > bluetooth dongle and 5ft of air.
> > 
> > Who's up for the challenge?  If there's enough interest in the 
> > community, I'll be the first to add a bounty on this -- it would be 
> > worth at least $100 to me to have this functionality.
> > 
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