Kitz Forum
Broadband Related => Broadband Technology => Topic started by: WWWombat on May 11, 2017, 09:13:27 PM
-
I recently came across the BT video archives, with films from the 40's being ... interesting.
http://www.btplc.com/Thegroup/BTsHistory/BTfilmarchive/1940s/index.htm
I would doubt the claim that the E-side is --
Once an E-side cable has been installed, the joints are virtually never re-opened. (The will always be a "corner case", in some obscure location, that will be an exception to the rule.) Pair swaps do take place, as that just requires a manipulation at the cabinet and the exchange MDF.
Videos on Jointing and Plumbing give a hint about why the E-side isn't opened up much!
-
Thank you for providing the link. I've book-marked it and will have to make some time to view those videos. :)
-
Watched the jointing one, it's incredible really that they still work all these years on considering they are insulated with paper.
-
The plumbing video goes through the process of sealing the joint, and pressure-testing it. And, of course, the whole E-side line is air-pressurised from the exchange too, so if it leaks, it leaks outwards.
I think the videos in the 60's start talking about plastic-coated cables.
-
Here's a 1970 film covering the conversion of Upminster from a manual/operator exchange to Crossbar
https://www.youtube.com/watch?v=VVTzEVPz1YA