Products > Test Equipment

Test Equipment Anonymous (TEA) group therapy thread

<< < (25160/27436) > >>

AVGresponding:
An up to date glasses prescription might be more helpful, and perhaps some breathing exercises.

As far as equipment goes, for maximum accuracy I'd cobble together something like This Old Tony's ultrasonic cutter with a simple point, and a footswitch.

BU508A:
Today arrival: 10 Vishay (I think so) IL300-C optocouplers, discussed a few pages back.
2 Euro per piece.

Specmaster:

--- Quote from: tautech on July 08, 2022, 11:35:59 pm ---
--- Quote from: Cerebus on July 08, 2022, 11:20:53 pm ---The truly worrying thing about the Rogers meltdown is if there is anyone competent at Rogers and they were listened to it would not be possible for all of the infrastructure of a telco, encompassing Internet, voice, private data and so on to collapse together.

The only way this can happen is by creating a single point of failure for a collection of systems that, if built organically, or haphazardly, or even randomly, would not naturally have a single point of failure. You have to really go out of your way, and be monumentally stupid, to create a scenario where this is possible.


--- End quote ---
Worldwide, these sort of failings can be traced to one failure point......bean counters !
Actually it's more serious in that the western systems rewarding CEO's for their profitability or not driven, by rewarding shareholders being their biggest focus rather than staying in their lane and sticking to their knitting where bean counters get into positions of far too much influence and suck the CEO's into this downward spiral.
We'll see more of this in the next while is my prediction.

--- End quote ---
1000 times this all day long. When I was working at Crabtree Electrical, bean counters cost them 100's of school rewires each year because they would not allow the factory to make and the warehouse to stock surface metal wiring accessory boxes with NO knockouts in them so that they would be ready for the school holidays when contractors typically did the school rewires. It was a constant battle trying to get these produced and delivered in time to ensure that they be completed on time. :palm:

Cerebus:

--- Quote from: 25 CPS on July 09, 2022, 01:54:36 am ---The Canadian telecommunications industry has always been very well protected and lacks competition, meaningful regulation, and a whole raft of other complaints.  Rogers and Bell aren’t just telecommunications companies, they’re also giant media conglomerates here.  Basically, they’re representatives of several over-consolidated industries.  Another example, look at the key players behind Maple Leaf Sports and Entertainment.  See any names you recognize?  The bottom line is, they’re well protected, have no meaningful competition or oversight, and they operate the way they do because they can.

--- End quote ---

The thing about monopolies in telecommunications is that, in theory, they are in a better position to build reliable networks than truly competitive companies. Being a monopoly means that you aren't [effectively] subject to price competition, so you don't have to cut your prices to the bone, so you can afford the redundant capacity and infrastructure to build a reliable network. One of the best techniques for building a reliable IP network I know I stole wholesale from how the GPO, a state monopoly, used to build out its interexchange links for reliability in its voice network.

But what's going on here isn't bean counters, lack of competition etcetera, although I'm sure that those have made their mark. This cascading failure, across networks using different technologies doesn't arise from a single point of failure that would arise naturally, even in the face of penny pinching. It requires additional effort, and hence additional cash, to engineer a single point of failure into a network that would naturally fail into isolated islands of connectivity into one that can be brought down across the board by something happening at a single, presumably central, point. Someone has taken some network function that is naturally distributed, brought it under central control, and done it in such a way that if the central control fails it is very hard to recover from because the distributed parts can't talk to the central control for recovery purposes once the central control fucks up and takes out communications across the whole network.

My guess? They've moved to using IP for all their internal connectivity, making everything rely on IP being working. Then they've failed to separate their control and data planes across the network, controlled BGP from a central point and redistributed BGP routes into their interior routing protocol and, crucially, made it possible for those injected routes to break connectivity for their control plane as well as their data plane. Result? A network that you can break quickly and easily by fucking up your centralised BGP routing, but where to recover from broken BGP you have to get engineers out to manually reconfigure routing across the whole network, router by router.

Cerebus:

--- Quote from: mansaxel on July 09, 2022, 06:06:47 am ---
--- Quote from: vk6zgo on July 09, 2022, 02:18:11 am ---
Competition in Telecommunications is pretty much fake anyway.


--- End quote ---

We have something like 4 mobile carriers, and perhaps as many rebrandings which is no real net. They found the 3G build-out requirements tough to meet in the northern regions, because they're not as desolate as .au outback, but they're the least populated areas in entire Europe.  They pooled up in 2 networks, so there is some competition.

Dark fibre is the other issue. There is a lot of fibre providers over the country; only one, the old monopoly, has some claim to reach from long-reach transmission into peoples homes, but there is enough competition that you can build a fibre network all over the country without using much of their lines.

ISP-wise, we've got like 4 large and perhaps 10 small ISP's that have presence over the country. Most of the smaller ones are local. There is aggressive concentration going on in form of buying up smaller competitors.  In the large cities, you can effectively multi-home for a sensible price (or could, before IPv4 addresses ran out; now only v6 is cheap.) but on the countryside, it's harder.

Competition does exist, but the larger ones tend to try squashing it as much as possible, of course.

At work, I buy lit waves and dark fibre, and shop for IP transit, and it's reasonably healthy on the wholesale market which we're in, even if we're a end-user, because of our capacity needs; we can generate close to 0,6 Tbit peak outbound.

--- End quote ---

I must be more cosmopolitan than I thought, You Tube just served me up an ad in French and the other day it served me up one in German.  :)

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod