On 15/02/2011 19:31, Clive wrote:
In message , Roland Perry
writes
LU paying to have the infrastructure fitted so they could talk to
train drivers, and the public also using it being a bonus.
Drivers on the Victoria line could talk to control via the juice rails
in 67, I would have thought that it would have been universal by now.

LUL trains now use a GSM system, albeit on a different frequency, right?

Failing that, they can use an autophone at a station. If they cannot get
to one, then they can connect a handset to two wires in the tunnel.

"Paul Terry" ha scritto nel messaggio
...
In message , Brian Watson
writes

It's because

1) *y o u a r e u n d e r g r o u n d* and there are usually at least a
few yards of earth between you and the mast, also

2) People don't want to hear you shouting, "I AM ON THE TRAIN" over the
racket of a tube train so no-one is going to go to the expense of enabling
it.

I never cease to be amazed at the number of phones users who shout down
their mobiles "Hello, hello! Can't you hear me?" as the Piccadilly plunges
down to the depths after Baron's Court. I guess they never studied
physics.
--
Paul Terry


well, in italy we got mobile phone working even inside galleries or tunnels
and it's worthy in case of help assistance. It's not only because of having
a talk but a question of safety also for oneself as a plus.

I guess it would be useful even working inside the underwear.. lol

why there's no mobile coverage within the tube? I tried to call a
friend but unsuccessfully.

It's because

1) *y o u a r e u n d e r g r o u n d* and there are usually at least
a few yards of earth between you and the mast, also

I don't think the fact that you're underground is the problem. The
technology exists to do it, and it will happen. The Metro in Paris has
mobile coverage despite being "underground".

I know you know this, but I thought your response made you sound like a
grade A prick, so I thought I'd spell it out to you.

In message ,
" writes
Failing that, they can use an autophone at a station. If they cannot
get to one, then they can connect a handset to two wires in the tunnel.
I remember on 38 stock on the Northern line in the evenings, it was a
rostered move to stop in the Colindale tunnel and speak to control using
the two wires and a piece of apparatus that was called "Dryco" if my
memory is working. This item didn't interfere with traction current,
whereas using the handset would cut the current just as would touching
the two wires together.
--
Clive

"Martin Petrov" ha scritto nel
messaggio ...
why there's no mobile coverage within the tube? I tried to call a
friend but unsuccessfully.

It's because

1) *y o u a r e u n d e r g r o u n d* and there are usually at least
a few yards of earth between you and the mast, also

I don't think the fact that you're underground is the problem. The
technology exists to do it, and it will happen. The Metro in Paris has
mobile coverage despite being "underground".

I know you know this, but I thought your response made you sound like a
grade A prick, so I thought I'd spell it out to you.


well.. then it happened to me that the local operator butted in my mobile
phone call while I was calling home and said "don't call your mama" ..
really upset..

wrote in message
...
On 15/02/2011 19:31, Clive wrote:
In message , Roland Perry
writes
LU paying to have the infrastructure fitted so they could talk to
train drivers, and the public also using it being a bonus.
Drivers on the Victoria line could talk to control via the juice rails
in 67, I would have thought that it would have been universal by now.

LUL trains now use a GSM system, albeit on a different frequency, right?

AIUI no, online references suggest LU's 'Connect' is a TETRA based system,
like the emergency service's Airwave systems.

Paul S

"Paul Scott" wrote in message
...
wrote in message
...
On 15/02/2011 19:31, Clive wrote:
In message , Roland Perry
writes
LU paying to have the infrastructure fitted so they could talk to
train drivers, and the public also using it being a bonus.
Drivers on the Victoria line could talk to control via the juice rails
in 67, I would have thought that it would have been universal by now.

LUL trains now use a GSM system, albeit on a different frequency, right?

AIUI no, online references suggest LU's 'Connect' is a TETRA based system,
like the emergency service's Airwave systems.

Paul S

http://en.wikipedia.org/wiki/Connect_Project

Paul

Brian Watson wrote:
2) People don't want to hear you shouting, "I AM ON THE TRAIN" over the
racket of a tube train so no-one is going to go to the expense of enabling
it.

There's no reason why mobile operators couldn't deploy a BTS that only
allowed texts, data and emergency calls. Though they wouldn't make as much
money out of it, which might not make it too attractive.

Theo

Walter Briscoe wrote

Alternatively, let's have quiet cars as we used to have non-smoking
cars. Sadly, my experience of c2c quiet cars is that mobile phone
users
assume they can inflict their conversations on everyone, everywhere.
I
have no objection to anyone using a mobile phone, privately. I do
have
problems when their calls are imposed on me.

There are now thousands of users who would find coverage useful and
would not disturb anyone.

The Kindle ebook reader comes with a free 3G data link (GPRS or EDGE if
no 3G) mainly intended for downloading books but which including a
simple internet browser. And I have just acquired one (£152).

A user could check Live Departure Boards on the way to the station
without presenting, as a smart phone would, the temptation to use voice
and thus annoy fellow travellers.

I am gathering transport related uses:
http://www.nextbuses.mobi/
(for buses)
http://m.vpike.com
for a google street and/or sat map centred where you wish.


--
Mike D

On Feb 16, 10:32*pm, "Paul Scott"
wrote:
LU paying to have the infrastructure fitted so they could talk to
train drivers, and the public also using it being a bonus.
Drivers on the Victoria line could talk to control via the juice rails
in 67, I would have thought that it would have been universal by now.

LUL trains now use a GSM system, albeit on a different frequency, right?

AIUI no, online references suggest LU's 'Connect' is a TETRA based system,
like the emergency service's Airwave systems.

Yes, correct. Indeed, Connect is set up so that the emergency services
can use Airwave handsets whilst underground in the event of an
emergency (I was very tangentially involved with the project to
integrate them, which was significantly hastened after the events of
July 2005).

I suspect Hounslow was thinking of mainline/NR trains, some of which
currently do, and all of which at some point this decade will, use the
GSM-R standard for driver communication with signallers, dispatchers,
controllers, etc.

--
John Band
john at johnband dot org
www.johnband.org