https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
does anybody know where that exchange is?
On Sun, 26 Sep 2021 18:14:58 +0100
"Jim GM4DHJ ..." <kinvig.netta@ntlworld.com> wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
does anybody know where that exchange is?
no.....
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
On Sun, 26 Sep 2021 18:14:58 +0100, "Jim GM4DHJ ..." <kinvig.netta@ntlworld.com> wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
Dunno... but it will be flats now just like all the others in prime locations.
On Sun, 26 Sep 2021 18:14:58 +0100
"Jim GM4DHJ ..." <kinvig.netta@ntlworld.com> wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
no.....
On 27/09/2021 08:47, Jim GM4DHJ ... wrote:
On 26/09/2021 22:18, Rambo wrote:
On Sun, 26 Sep 2021 17:50:26 +0100, "Jim GM4DHJ ..."looks like st pauls beside a railway bridge into a station.....
<kinvig.netta@ntlworld.com> wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
Been there done that......
looks like it has gone...
https://www.google.com/maps/@51.5095527,-0.0903246,166m/data=!3m1!1e3
https://www.google.com/maps/@51.5086129,-0.0909223,3a,60y,11.83h,99.96t/data=!3m6!1e1!3m4!1saUi-v91PLRPkPrOO0_4KOg!2e0!7i13312!8i6656
On 26/09/2021 22:18, Rambo wrote:
On Sun, 26 Sep 2021 17:50:26 +0100, "Jim GM4DHJ ..."looks like st pauls beside a railway bridge into a station.....
<kinvig.netta@ntlworld.com> wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
Been there done that......
On Sun, 26 Sep 2021 17:50:26 +0100, "Jim GM4DHJ ..." <kinvig.netta@ntlworld.com> wrote:
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
Been there done that......
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:Mondial House, opposite Faraday, Blackfriars, was the first TXE exchange post Strowger
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
does anybody know where that exchange is?
On Sun, 26 Sep 2021 20:02:31 +0100 Bernie <bernie.usenet@gmail.com>
wrote:
On Sun, 26 Sep 2021 18:14:58 +0100 "Jim GM4DHJ ..."Wherever, they must have had some big batteries to get that trimphone ringing. Remember the luminous dials?
<kinvig.netta@ntlworld.com> wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch? v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
no.....
On Sunday, 26 September 2021 at 18:14:59 UTC+1, Jim GM4DHJ ... wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:Mondial House, opposite Faraday, Blackfriars, was the first TXE exchange post Strowger
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
On Mon, 27 Sep 2021 07:08:01 -0700 (PDT), Tim Hague
<m0afj@yahoo.co.uk> wrote:
On Sunday, 26 September 2021 at 18:14:59 UTC+1, Jim GM4DHJ ... wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:Mondial House, opposite Faraday, Blackfriars, was the first TXE exchange post Strowger
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
The first TXE2 was in Ambergate Derbyshire. I had the pleasure of
working in the beast, it was quite different from the later versions.
After conversion to Sys X back in 90's the racks and units were taken
to the Science Museum. A few items are on display.
On Sun, 26 Sep 2021 20:52:28 +0100, A. non Eyemouse wrote:
On Sun, 26 Sep 2021 20:02:31 +0100 Bernie <bernie.usenet@gmail.com>v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
wrote:
On Sun, 26 Sep 2021 18:14:58 +0100 "Jim GM4DHJ ..."
<kinvig.netta@ntlworld.com> wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?
Wherever, they must have had some big batteries to get that trimphonedoes anybody know where that exchange is?
no.....
ringing. Remember the luminous dials?
Radioactive dials using Tritium
Mondial House, opposite Faraday, Blackfriars, was the first TXE exchange post Strowger
what happened to system X? was it obsolete before it was finished ?
...
On 27/09/2021 16:11, Rambo wrote:
On Mon, 27 Sep 2021 07:08:01 -0700 (PDT), Tim Hague
<m0afj@yahoo.co.uk> wrote:
On Sunday, 26 September 2021 at 18:14:59 UTC+1, Jim GM4DHJ ... wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:Mondial House, opposite Faraday, Blackfriars, was the first TXE exchange post Strowger
https://www.youtube.com/watch?v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProjectdoes anybody know where that exchange is?
The first TXE2 was in Ambergate Derbyshire. I had the pleasure of
working in the beast, it was quite different from the later versions.
After conversion to Sys X back in 90's the racks and units were taken
to the Science Museum. A few items are on display.
what happened to system X? was it obsolete before it was finished ? ...
On Mon, 27 Sep 2021 16:26:34 +0100, Jim GM4DHJ ... wrote:
what happened to system X? was it obsolete before it was finished ?
...
It was getting older certainly, and started to be replaced by the 21CN
system starting somewhere in the late 2000s to early 2010s. But not all
of it, and not everywhere yet. Maybe not for some time.
Remember that the underlying networking has moved from ATM asynchronous
to IP-based too, this stuff sits on top of that.
On Mon, 27 Sep 2021 16:26:34 +0100, Jim GM4DHJ ... wrote:
what happened to system X? was it obsolete before it was finished ?
...
It was getting older certainly, and started to be replaced by the 21CN
system starting somewhere in the late 2000s to early 2010s. But not all
of it, and not everywhere yet. Maybe not for some time.
Remember that the underlying networking has moved from ATM asynchronous
to IP-based too, this stuff sits on top of that.
On Mon, 27 Sep 2021 17:07:48 -0000 (UTC), Brian Morrison
<bdm@fenrir.org.uk> wrote:
On Mon, 27 Sep 2021 16:26:34 +0100, Jim GM4DHJ ... wrote:
what happened to system X? was it obsolete before it was finished ?
...
It was getting older certainly, and started to be replaced by the 21CN >>system starting somewhere in the late 2000s to early 2010s. But not all
of it, and not everywhere yet. Maybe not for some time.
Remember that the underlying networking has moved from ATM asynchronous
to IP-based too, this stuff sits on top of that.
21CN never replaced SySX/AXE. It simply didn't work as a voip PSTN.
On Mon, 27 Sep 2021 19:20:28 +0100, Rambo wrote:
On Mon, 27 Sep 2021 17:07:48 -0000 (UTC), Brian Morrison
<bdm@fenrir.org.uk> wrote:
On Mon, 27 Sep 2021 16:26:34 +0100, Jim GM4DHJ ... wrote:
what happened to system X? was it obsolete before it was finished ? >>>> ...
It was getting older certainly, and started to be replaced by the 21CN >>>system starting somewhere in the late 2000s to early 2010s. But not all >>>of it, and not everywhere yet. Maybe not for some time.
Remember that the underlying networking has moved from ATM asynchronous >>>to IP-based too, this stuff sits on top of that.
21CN never replaced SySX/AXE. It simply didn't work as a voip PSTN.
That fits in with my first paragraph, I am not familiar enough with the >detail to know much more than I wrote. I don't know exactly where the >21CN/20CN boundary lies, it's probably different in different areas.
I do know that reliability is a big part of the reason that the older kit >remains in use.
On 27/09/2021 15:28, Sysadmin wrote:
On Sun, 26 Sep 2021 20:52:28 +0100, A. non Eyemouse wrote:
On Sun, 26 Sep 2021 20:02:31 +0100 Bernie <bernie.usenet@gmail.com>v=wI3z_gGXNwU&ab_channel=ComputerHistoryArchivesProject
wrote:
On Sun, 26 Sep 2021 18:14:58 +0100 "Jim GM4DHJ ..."
<kinvig.netta@ntlworld.com> wrote:
On 26/09/2021 17:50, Jim GM4DHJ ... wrote:
https://www.youtube.com/watch?
Wherever, they must have had some big batteries to get thatdoes anybody know where that exchange is?
no.....
trimphone ringing. Remember the luminous dials?
Radioactive dials using Tritium
External exposure to tritium does not pose a significant health risk.
If tritium is absorbed or ingested into the body, the beta radiation
emitted by tritium decay could cause damage to surrounding cells....so...don't eat it
21CN was badly designed. It was a hot potch of components from different manufacturers including in the main Huawei and Cisco. I was directly
involved in the first trial and it simply didn't work as a PSTN. It is however still providing service as an IP backbone for the country.
On Tue, 28 Sep 2021 00:07:47 +0100, Rambo wrote:
21CN was badly designed. It was a hot potch of components from different
manufacturers including in the main Huawei and Cisco. I was directly
involved in the first trial and it simply didn't work as a PSTN. It is
however still providing service as an IP backbone for the country.
I suppose it's the S in PSTN that is the problem, presumably as older kit
and networks are withdrawn there will be less and less of that.
At some point everything will be IP-based.
I remember walking past a large exchange in Fulham in the early 80s, in
the dead of night you could hear all the Strowger mechanisms churning
away, didn't seem to matter what the time was.
https://www.youtube.com/watch?v=LMxate9geggNow I know why it was called a wereless set
On 05/04/2022 16:49, Jim Stewart ... wrote:wireless set
https://www.youtube.com/watch?v=LMxate9geggNow I know why it was called a wereless set
https://www.youtube.com/watch?v=sf_UzdvTyKQ&ab_channel=SWLDXBulgaria
In message <tsgea9$2iqhs$2@dont-email.me>, Jim gm4dhj ... <kinvig.netta@ntlworld.com> writesindeed
https://www.youtube.com/watch?v=sf_UzdvTyKQ&ab_channel=SWLDXBulgaria
Oh those happy days of Radio Tirana on the 100kc wide 40m band!
On 14/02/2023 20:09, Ian Jackson wrote:
In message <tsgea9$2iqhs$2@dont-email.me>, Jim gm4dhj ...indeed
<kinvig.netta@ntlworld.com> writes
https://www.youtube.com/watch?v=sf_UzdvTyKQ&ab_channel=SWLDXBulgaria
Oh those happy days of Radio Tirana on the 100kc wide 40m band!
On 15/02/2023 08:38, Jim gm4dhj ... wrote:
On 14/02/2023 20:09, Ian Jackson wrote:
In message <tsgea9$2iqhs$2@dont-email.me>, Jim gm4dhj ...indeed
<kinvig.netta@ntlworld.com> writes
https://www.youtube.com/watch?v=sf_UzdvTyKQ&ab_channel=SWLDXBulgaria
Oh those happy days of Radio Tirana on the 100kc wide 40m band!
Isn't that why Yaesu invented the 20dB attenuator?
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