Not quite the first...
I used to work for a company years ago doing this.  All their phones have a
walkie-talkie function over the GSM network.

Check out http://www.maximonsolutions.com/dolphin.html



Brian.

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Russell McMahon
> Sent: 05 January 2004 10:21
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE:] Worlds first walkie-talkie GSM handset
>
>
> The next big thing in cellular telephony ?????????
>
> Walkie Talkie function on GSM cellphone using GPRS data channel
> independent
> of telephony function per se.
>
> Uses Symbian O/S. Nokia say ALL their phones will have this walkie talkie
> feature by 2005. Allows instant coms to selected individuals OR group and
> (in NZ anyway) costs are per data (time sending) used (assuming
> GPRS pricing
> applies).
>
>  http://www.cellular-news.com/story/10106.shtml
>
>     Also
>
>         http://www.theregister.co.uk/content/68/33956.html
>
>
> This transatlantic example shows that the heading above is wrong
>
>         http://www.infosyncworld.com/news/n/2941.html
>
> As does this
> Fast Chat. US
> Mentions Siemens, Samsung and Sendo are producing Symbian handsets.
>
>         http://www.3g.co.uk/PR/May2003/5355.htm
>
> Siemens "PoC"  (Push-to-Talk over cellular)
> " ... will be a big hit in 2004".
> PoC on entire Siemens range by mid 2004
> (not what they say further down)
>
>     http://www.3g.co.uk/PR/Dec2003/6254.htm
>
>
>
>         Russell McMahon
>
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