atcomsystems.ca/forum Forums General General Telephone & Systems Information Whats the right thing to call it/what's in it?

Bell typically lowballed it, at GTE we usually went a little better on the residential subscribers and a lot higher on the business network end of things.

Now you get into things like CCS and Erlangs.

CCS=Call Centi Seconds. How many seconds an hour can each phone be off hook. There are 60 seconds in a minute and 60 minutes in an hour, therefor there are 3600 seconds or 36 Centi seconds in one hour. To allow each phone to be off hook anytime and never get a busy signal would then require that each phone have a CCS of 36. Bell used to spec a residential CCS of 2.5 on their COs. NEC and Northern Telecom (on their PBXs) went in for a CCS of 5 or a 6. GTE used to spec about a 10 or a 12 for their private networks. I'd have to pull the old priming charts and tables to be sure but those numbers should be close.

At the Bank, the SVP of Telecom told me he wanted 1 more trunk then he really needed. He never wanted people to get a busy signal, but he didn't want to pay too much.

You need to run endless traffic studies, find the "Busy Hour" and then work from there. Before PCs it involved pouring over page after page of green-barred printouts. And after you figure it out you've got to continually monitor it, because - things change!

I actually got written up in a trade journal because I created a PC based application that made the Network Managers job significantly easier.

But that was then.

Sam I remember doing traffic studies also, we had classes on traffic theory at SNET. If I remember right we used Poisson tables for DID trunks. Back then the phone company could dictate to you the number of DID trunks you had to have so as not to back-up the network.

Larry -

Poisson tables were for Erlang, right? I seem to remember that you could run your traffic tables with either CCS or Erlang. They were essentially two ways of looking at the same thing.

I learned them both but stuck to CCS - unless I was dealing with our overseas operations and then I would (curse and) convert to Erlang.

Sam

I'm somewhat familiar with the queueing theory.

Part of my job consists of deconstructing it to figure out at what rate (dials/second/channel) calls can be placed in order to not busy out a shelf and getting the customer fined for obstructing a public utility.

If it's not that it's trying to figure out at what point they start throttling you. They all do it but wont admit it. I've actually had to have a carrier distribute T's through their facility to prevent it.

Like Sam said, call centers are the exception to all things queuing theory

So, to answer your original question Matt, they put that goo inside the network enclosure to keep people from opening them. Does that answer your question in fifty posts or less? :rofl:

Sorry, I couldn't resist.

LOL - and it works really well!

It's amazing what one can learn from goo, isn't it?

And if ya told me when I was 8 I'd be asking about goo 36 years later, on a magical device that would let me communicate with some of the very people who were installing the goo container containers at that very moment... well, you know.

And further, that one day that same goo would be responsible for me learning a little bit about Nyquist, and Queing theories, I'd of probably said: "Damn, I wish I'd of torn this apart 2 years ago."

Ed, I think your post deserves another goo story, only let's really go off into the ditch this time.

Brother says his flourescents come on intermittently... I tell him it's probably a bad ballast. Course he doesn't know what a ballast is, so he's looking for a starter, but can't find one. I tell him better to let it be, a little about PCB's, how very unlikely it is they are present, but still .... leave it alone, I'll have a look at it.

So I go on over, flip the lights on, and sure enough, they're intermittent.

Take the cover of the fixture, and .... loads of black goo drip on down........ brother says: Oh! so that's a ballast!

No, that WAS a ballast. Now it's a goo dripping black box.

Take the cover off the other fixture (there were 2, 2 bulb strips), just to make sure... and whatta ya know, the goo is oozing there as well.

So I cut it out and bring it down, brother looks at it and says Hey! no PCB's! Says so right here.

So, my brother now knows a bit more about how flourescent fixtures work, what PCB's are, that a new ballast costs more than a new fixture, and how to replace a fixture. But, he doesn't know a darn thing about Nyquist, I can tell ya that much.

Regardless, all these good things come from our ever present friend: goo.

PCB's and leaking ballasts.... I shudder to think of the hundreds of leaking ballasts that I replaced in my full-time career as a sparkie. Not to mention the tons of "that white stuff" that I removed from boilers and steam pipes when working as a plumber's helper through high school.

Cracking into a phone's network sounds like small potatoes now.

Hey, you hijacked your own thread this time, so I'm not responsible for having replied.

The PCBs weren't in the "goo", which was the same as the potting in that old network. The capacitor, one of the two devices in that goo used to contain small quantities.

-Hal

ROFL. I got busted.

Sure you didn't have a part time job as a cop in there somewhere?