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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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2nd Jun 2020, 10:56 pm | #1 |
Pentode
Join Date: May 2010
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Video of last manual exchange in London
I found this video on BT's site, it depict the last manual exchange in London beeing replaced with an automatic exchange.
It's fifteen minutes but i think it was well spent time watching it. It is a somewhat bittersweet, sometimes even emotional story. Especially the moment when the old exchange is disconnected after many years of service and suddenly becomes just a room full of old junk. http://home.bt.com/video/relive-the-...91364117408068 |
3rd Jun 2020, 2:21 pm | #2 |
Octode
Join Date: Jun 2013
Location: Fleet, Hampshire, UK
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Re: Video of last manual exchange in London
Interesting video. "2000 pair cable"
The previous site of the company I work for was a BT exchange building, built sometime in the 50s or early 60s. A big section on the 1st floor was rented out to us as a data centre room, with some office space next to it. The winching point where they bring up the huge cable drum in that video looks identical to the one at our first floor data centre room. I suppose that's what it was there for! |
3rd Jun 2020, 8:10 pm | #3 |
Octode
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Re: Video of last manual exchange in London
That is a cracking film. Surprised that manual exchanges were still operating so late. I am surprised that they went for an electromechanical exchange rather than an all electronic exchange. I presume that it was quickly superseded by a solid state exchange.
Wonder how many of the dial less telephones were saved and the old manual exchange equipment was saved? Presumably still all old junk then and not worth saving. Christopher Capener
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3rd Jun 2020, 9:11 pm | #4 |
Dekatron
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Re: Video of last manual exchange in London
One thing that surprised me was the use of wedges to disconnect the lines from the manual exchange prior to using a second set to connect them to the automatic.
In footage I've previously seen of electromechanical exchanges being replaced by electronic ones, the disconnection was performed by rows of technicians simply snipping the cables prior to the wedges being pulled to cut in the new exchange. To me, this seems the obvious approach, rather than preceding the cut-over by laboriously connecting equipment whose only purpose will be to perform that same effect of disconnecting the existing lines - unless, of course, these wedges were an integral part of the manual exchange to begin with.
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3rd Jun 2020, 9:39 pm | #5 | |
Nonode
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Re: Video of last manual exchange in London
Wonderful film, full of the reassuring feeling that the mustachioed, suited gentlemen of the Post Office were looking after us and making progress on our behalf. The music is a joy too.
Quote:
Chris
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3rd Jun 2020, 10:17 pm | #6 |
Hexode
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Re: Video of last manual exchange in London
Manual exchanges in some areas lated for a long time, Hastings and Newbury did not change until 1973/74 and I belive the very last one according to a television news article at the time, was Portree on the Isle of Skye. Also when Rainham exchange was converted I don't think the System X electronic exchanges existed.
Regards Trevor. |
3rd Jun 2020, 11:05 pm | #7 |
Heptode
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Location: Flintshire, UK.
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Re: Video of last manual exchange in London
Upminster (in the film) was converted c1971 and at that time the manual exchange in March 1971 had 7100 lines on it. It was converted to a Non Director crossbar exchange which had 7700 lines on it a year later. The only electronic exchanges at that time were the TXE2 (Telephone eXchange Electronic No 2).
As far as I can find out, only one manual exchange was ever converted direct from manual to electronic - a TXE2. That was 'Rhosllanerchrugog' a five position CBS2 manual exchange in a private house in Rhos Notice 'DP 1' (Distribution Pole) in the back garden of the exchange house - grey on on the right of photo. It had 893 lines on it when it changed over to a TXE2 - commissioned by guess who in 1972? The first large electronic exchange was Birmingham 'Rectory' - the first TXE4 which didn't come into service until 1976. Guess who was senior commissioning engineer there? ex-GPO manual exchanges do survive - I have a couple. One is the CBS2 that was Braunton in Devon until late 1960's and the only surviving CS No 3 exchange out of the 475 which the GPO once had in service. It was a small 3 junctions + 20 lines (originally it had been a 3+5 when it was fitted in 1925 by David John McFarquhar the GPO engineer for the area. The operator in whose house it was, was a Miss Kathy Fullerton. Also got the centre suite from the switchboard which appears throughout this film series - the last large manual board that will ever be built as the rest of the positions were scrapped after the second series. There was nothing in them anyway as they had been stripped to get them out from their 'bunker type' location. It was the original GPO 'auto-manual' switchboard at the then newly opened Portmadoc automatic exchange in 1943 as in the black and white picture. |
3rd Jun 2020, 11:43 pm | #8 | |
Heptode
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Re: Video of last manual exchange in London
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4th Jun 2020, 8:58 am | #9 | |
Dekatron
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Re: Video of last manual exchange in London
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4th Jun 2020, 9:19 am | #10 | |
Tetrode
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Re: Video of last manual exchange in London
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4th Jun 2020, 12:53 pm | #11 |
Dekatron
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Re: Video of last manual exchange in London
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4th Jun 2020, 2:13 pm | #12 |
Dekatron
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Re: Video of last manual exchange in London
I noticed that some scenes from this video re-appeared in last night's repeat of the Timeshift programme, Dial "B" for Britain: The Story of the Landline.
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4th Jun 2020, 2:49 pm | #13 |
Pentode
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Re: Video of last manual exchange in London
It was but I lament the lack of UK design and manufacturing companies nowadays.
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4th Jun 2020, 3:54 pm | #14 |
Heptode
Join Date: Jul 2007
Location: Flintshire, UK.
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Re: Video of last manual exchange in London
Is there a British owned manufacturer of telecoms equipment these days - other than the odd specialist telephones ?
I'm sure the then GPO would only purchase UK manufactured equipment. |
4th Jun 2020, 4:24 pm | #15 |
Octode
Join Date: Jan 2003
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Re: Video of last manual exchange in London
I don't think so, but don't forget that STC were founded by US based Western Electric in 1883, owned by the US based ITT corporation from 1925 to 1982 and were only truly an independent British company from 1982 until they disappeared in 1991.
John |
4th Jun 2020, 5:50 pm | #16 |
Heptode
Join Date: Apr 2011
Location: Edinburgh, UK.
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Re: Video of last manual exchange in London
And made sure they had multiple suppliers of compatible parts.
Last edited by AC/HL; 4th Jun 2020 at 7:29 pm. Reason: OT aside edited |
5th Jun 2020, 8:30 am | #17 |
Heptode
Join Date: Jul 2006
Location: Winchester, Hampshire, UK.
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Re: Video of last manual exchange in London
I used to work for Pirelli cables making, among other things paper and plastic insulated telephone cables. To be sure the GPO shared orders around the various manufacturers to make sure no monopoly developed. The CEGB were the same - but at the other end of the signal power scale!
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5th Jun 2020, 11:00 am | #18 |
Dekatron
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Re: Video of last manual exchange in London
Lovely film that and very nostalgic. When we moved down to Dorset in July 1970 the Borough Green Kent exchange was still manual although they had given us phones with dials about a year earlier, so it must have been changed over soon after we left. Many of the operators had been local people some of whom I knew.
When we arrived in Charmouth we were greeted by an automatic exchange with only a few hundred subscribers. I like the 'updated' Morris 1000 vans, in my youth the GPO ran Morris 8s with rubber front wings. Peter |
5th Jun 2020, 11:49 am | #19 | |
Heptode
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Re: Video of last manual exchange in London
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I never saw anything during my GPO days that wasn't manufactured in the UK. |
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5th Jun 2020, 12:40 pm | #20 | |
Heptode
Join Date: Jul 2006
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Re: Video of last manual exchange in London
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I recall we (Pirelli) had a contract to part supply an 18tube Co-axial cable from Martlesham to the Birmingham PO tower. (Another example of the GPO spreading contracts around). Part of the in-situ testing involved testing the frequency response of the tubes up to around the upper hundreds of MHz using TDR techniques. We had ‘cracked’ how to do it but STC couldn’t. We ended up in a agreement with them that we would TDR test their cables once they were in the ground and they tested some other specs on our cables in return. Good fun driving around the streets of Birmingham lifting up manhole covers etc. The bacon sandwiches were great! Sorry to go OT. |
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