You know, when I first clicked on this video I thought "this guy is gonna ramble on and I'm gonna learn nothing"... But these videos are excellent. Thanks Jim, really appreciate your efforts..

As a Corporate Telecom Engineer, I really appreciate this piece of our history. Thanks again.

Excellent! Looking forward to the rest of this series.

Awesome video! You're very articulate, and charismatic! I wish I could find more videos like this! No replacement for experience.

I Had studied electronics and telecommunication +27 years ago , and I can say this video is amazing

Great video! The candlestick phone has what's called a "bulldog transmitter" as it doesn't have the cone shaped mouthpiece, but rather a "smashed in" looking one, like a bulldog's face. Another way of signaling the operator was through the use of magnetos, small hand cranked generators the customer would crank to summon the operator. Also, the 1/4 inch plugs used in audio, like on professional stuff, were an off shoot of the switchboard plugs, some people even call them TRS plugs for "tip, ring and sleeve" common names for the wires in a local loop!

Great video! Very well understanding in an easy way

It is a great series. Thank you really for such a good tutorial.

While I was a wire tech (U-Verse) with AT&T they refereed to the box as a cross box. They did have a few names for it though depending on the cable or ST that was working. But at the end of the day it was a cross box in the books.

Great Videos, Amazing teacher, Keep them coming.

I'm a residential electrician but I'm thinking about changing fields to low volt, av, or communications and these videos may convince me. Thanks for the contribution!

In Mobile AL 1965, they had DTMF (TouchTone) available in certain newer sections of town, The first TT phones had 10 buttons originally. 1-0. No # or *. About two years later the made it 12 buttons. I know this because installed then with South Central Bell. your right about Long distance rates. they started selling 'Package deals with the knew Trimline telephones. We sold a ton as technicians. i started there in 1968 and lived the whole transition to the modern era. I worked in the CO's (central office) on the equiptment, outside string wire to homes, then 25 pair cables for business telephones. The digital hit and we were down to a 4 pair cat 5 cable. it has been quite a ride.

Excellent video!! It is of great use for my exams! Thanks a million 🙏🙏

this is fantastic information. thank you for taking the time to share your wealth of knowledge with us.

This is an excellent video. Well done Jim. The term "Bbox" originates from "Breakout Box". It is also known as the cross-box or cross connect box or the SAI (serving area interface). It is the point where the signal moves from the C.O. (mentioned in your video) to the beginning of the neighborhood (or city block), the "local loop" (also mentioned in your video). It's basically a way to take tens of thousands of physical-wired connections and reduce them to perhaps the only hundreds of necessary physical-connections needed for your particular neighborhood/block. These wired connections reduce even further from the Bbox down through the neighborhood at smaller connection points to your particular street, and then to your home. It's more cost effective to take say 10, 000 connections and reduce them to the 20 connections needed for the 10 houses on your street, then it would be to move all 10, 000 connections to the side of each and every one of the 10 houses on your street. Just as an example.

God bless you, Jim your videos helped a lot, I'm so grateful and wish you all the best in the world.

Thanks Jim, please do more videos.

Over the earlier years of touch tone" dialing, the CO equipment couldn't actually handle DTMF switching. What they did, was add on a module to convert the incoming DTMF sequence to a pulse train, then pass the train to the Strowger switches. This extra equipment cost money, so the Telcos passed the expense on to subscribers for "touch tone" service. Otherwise, the tones did nothing, and only the dial pulses were routed directly to the Strowger banks.. Later, as systems became integrated, it was the other way around: pulses had to be converted to DTMF signals, as DTMF became the standard.

Excellent video. Great articulation by Jim. Was never boring!

Thank you so much Jim. Wow, what a nice video presentation. Easy to listen and well informed. Please have more info on Telecom and toll-free lessons..

very good sir. great job with what you've done.

too gud Sir... looking fwd for other vdos

Great information. Thanks

Great video thanks!

good job i look for the rest series

My Gaush sir... I can’t explain how you have helped me here... I have been looking for something like this which can help me understand the basics... I am joining telecom sourcing for my company and just wanted to start understanding from basics before getting into all the complexities... I will continue watching the videos... I am sure I am gonna have myself enriched in telecom knowledge after all these videos... I hope I can find something on internet as simple and detailed as your videos... if possible sir please provide something in internet as well from beginning of it till today... anyway sir thank you so much for such a nice series.

really helpful,keep it up jim

Thx for sharing. Learn a lot basic knowledge ^_^

Wonderful overview! Brought back many memories :-) Surprised you didn't mention the voltage in the part about close-loop.

I love this . Thanks for the history lesson sir.

Fantastic presentation. God bless you with the best possible in life for ever

Awsome! I've been in the industry for 16 years and still learned quite a bit! Great Video!

this is impressive... you are such an amazing teacher

Were there different sounding ROH (Receiver Off Hook) Warning Tones? There was a different sounding ROH tone with this telephone switch type called ATT/Philps Tel 5ESS-PBX Host. Have you heard that kind of telephone switch?

B box is short for balcony box. They used to have the cross connect boxes mounted on the poles with a seat that you could sit on while working. It looked like a balcony.

it really helps as im selling events for telecommunication

I think B-box means "Breakout box"; nice video;

Great video thank you

The B-box is called a B box because it's usually the point in the cable where the utility breaks out from the under ground and gets cross connected to the aerial(pole) section of the loop. The section from the CO to the b-box is the F1 assignment on a telecom order. The section after the b-box is the F2. There can a F3 or F4 etc etc but most circuits have two. F in this case, refers to facility. In telephone company vernacular, facilities are stations or terminals that have addresses and can be accessed by technicians to complete installs or make repairs. If you're an independent telecom guy don't go into a b-box or try to work on anything upstream from the last terminal listed on your order. All of that belongs to the local carrier(phone company) and they do not want you mucking it up.

I love this video! :D

Thank u very much!!

Well informed

Thanks

Wonderful video

I will pay to be taught by you. #Telecomgod!

Great

Good teach

I remember in my house we had two phones, tan and black with that thick cable and that phone had some weight on it!

Hello sir I'm really really interested in Telecom for being a career I really enjoy studying signals and learning new ways of connecting networks and devices and such.how do I get into the industry more or even as a hobby.I just got a job with Direct TV is there any pointers you can give me

we have new subdivisions going in in my area and at&t won't run copper to them so they can have a phone number. We are too rural to use cellphones so no one moving into the subdivision will have phone service of any kind. And if anyone living out here drops their copper phone line they will not reconnect you. That number and line is gone.

Thank u

Good video. Would of been excellent for people like me who are more visual

Telecom video ❤️❤️

I just want to know more knowledge everything's about telecommunication

Mhhh...............great job indeed

Where are the rest ? ... three parts are not enough !! Thank u so much though .

12:45 i know this video is 7 years old, but I don't know any analog systems anymore on use in 2021

I think the b in b-box may have stood for battery.

lm interesting telecommunications becouse my town do not have telecommunication

20:48 didn't get the point. If i dial faster i will be spending less time so other subscribers will have that extra amount of time or Availability per se so why would CO complain about me using there extra availability ?

cablesupply.com/171-telephone-cables

wow a video about telecom related stuff that isn't being told by some goofy hindu guy that barely can speak english. Thank you Lord.

You know, when I first clicked on this video I thought "this guy is gonna ramble on and I'm gonna learn nothing"... But these videos are excellent. Thanks Jim, really appreciate your efforts..