4 ms·
There's an old AT&T video showing the careful coordination and huge amount of manpower needed to upgrade a single telco switch. They had rows of workers with ca
by tjohns 8y ago
There's an old AT&T video showing the careful coordination and huge amount of manpower needed to upgrade a single telco switch. They had rows of workers with cable cutters, in order to literally cut the entire service over to the new equipment. Total downtime was just 47 seconds.
(And even during the cutover, they're careful not to interrupt any emergency calls.)
https://www.youtube.com/watch?v=saRir95iIWk https://www.youtube.com/watch?v=saRir95iIWk
- setquk 8y agoThat was absolutely amazing. Thanks for posting.
- DanBC 8y agoI love the "DON'T TOUCH THIS" post it at 3:55
- the_duke 8y agoSo, what exactly happened there? Where were the signals going after the cables have been cut?
- Animats 8y agoThe new switch was connected to each line in parallel with the old switch, but it was able to ignore incoming signals until told to take over. The old switch was hard wired enough that it could not be remotely commanded to have no effect on incoming signals. The line relay attached to each line had to be physically cut out of circuit.
- deleted 8y ago[deleted]
- camtarn 8y agoThat is spectacular - thanks for the link!