[IP] -- more on -- Party lines Push-to-talk service

[Dave Farber <dave@farber.net>]

> Date: Thu, 28 Aug 2003 06:48:31 -1000 (HST)
> From: Bill Sodeman <bill@sodeman.com>
> Subject: Re: [IP] Party lines Push-to-talk service
> To: dave@farber.net
>
> Dave,
>
> Nextel uses a separate frequency for PTT, while Verizon is using the
> cell network.
>
> There are three additonal problems with Verizon's PTT implementation.
>
> The first is latency. Nextel's PTT has relatively short delays,
> while Verizon can take several seconds. This issue alone might
> hamper Verizon's efforts, as Nextel customers seem to like the
> instant mssage aspect of PTT.
>
> There's also interoperability, or lack of it. Verizon PTT doesn't
> work with Nextel PTT. Nextel's done a fine job of extending PTT to
> the regional and now the national level, and promoting the use of
> industry-specific PTT groups. These features are very heplful for
> contractors in construction, civil engineering, and sales.
>
> http://www.business2.com/subscribers/articles/web/print/0,1650,51639,00.html
> (subscription required)
>
> Finally, both PTT systems only work on Motorola phones. Other
> manufacturers are putting PTT in their new hardware, and some Java
> phones like my Nokia 3650 can add PTT with software.
>
> http://slashdot.org/articles/03/08/15/2023216.shtml?tid=126&tid=137
>
> Aloha!
>
> Bill Sodeman
> bill-at-sodeman-dot-com
>
> Dave Farber said:
> > PTT makes much more efficient use of the limited spectrum since it
> > can use
> > more efficient coding etc.  djf

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