"Rupert Moss-Eccardt" wrote in message
...
Steve Terry wrote:
"tony wrote in message
...
In , Steve Terry
scribeth thus
"Roy wrote in message
...
On 22 Sep, 11:55, wrote:
"Roy wrote in message



On 22/09/10 11:24, Recliner wrote:
snip
Tetra has nothing to do with sound engineering reasons, it's entirely
political and a means of funnelling large quantities of taxpayers
money to O2 Airwave.

Some fairly bald assertions, there. And wrong, too.

Firstly, perhaps you can point us at a capabilities specification for GSM
Pro and take us through how it meets the requirements that Tetra meets to
match the ERC specification.

That would be the ERC spec that allows Tetra multiplexing at 17.6Hz that
the Police Association are litigating for health damage to their officers.
A problem that wouldn't exist with GSM
Trower report:
http://www.tetrawatch.net/papers/trower_report.pdf

Secondly, the TfL Tetra rollout doesn't involved Airwave, other than
requiring interworking.


Let me guess, you work for Airwave Tetra or TFL Tetra?
And Turkeys don't vote for Christmas.

In 2000 whist visiting Sweden i spoke to police officers about
their new GSM Pro personal radios (at the time using waterproof
Ericsson R250s) and they were very satisfied with them.
(retail price for Ericsson R250s at the time was around £100 each)
http://www.gsmarena.com/ericsson_r250s_pro-119.php

Also if required additional encryption can be added to each phone.

We of course years later had to reinvent the wheel, at the cost of billions
to the public for the benefit of private companies, and to the detriment
of the public allowing them to share an improved GSM network.

Steve Terry
--
"I would like to plead for my right to investigate natural phenomena
without having guns pointed at me.
I also ask for the right to be wrong without being hanged for it."
- Wilhelm Reich, November 1947