I used to work for Dell tech support back when the 56k modem was the norm. We used to get a lot of calls from people saying that they had problems connecting to the internet. One of the first questions was how many phones were on the line. Had to explain the whole REN thing and get them to check on their phones for the REN value. Some people would understand and go test with less phones on the line and others would be screaming for an engineer NOW lol. Also, when I was a teen our phone used to have a physical lock on the keypad to stop us running up massive bills. Used to be able to bypass it by dialling though the hangup.
13:32 No, the 74-series is a family of TTL integrated circuits. The 74595 is a shift register. :) The letters between 74 and the number is the type. HC = High speed CMOS. The 74HC85 is a 4-bit magnitude comparator. It can answer the rather simple question: Is A less, equal or greater than B, where A and B are 4-bit binary numbers (or BCD). Simple question, but it's not easy to build with logic gates. The 74HC4040 is a 12.stage ripple counter.
Thanks for documenting this device here on RUclips. A really good video! Would love to be able to have a wee play around with British telephones... I bet as this equipment wasn't intended for the general public (at least it looks like lineman tools) they're likely uncommon to come across though. :-(
I wonder if the exchanges are still setup for pulse dialling, I saw an old phone in an antiques shop this week, would be interesting if it could still be used.
Some of them retain this feature however with the rise of broadband ect, exchange space is a premium. You can still buy a modern rotary phone which has a built in electronic dialer behind the rotor to overcome this issue, but another feature on the way out is the bell wire, which used to ring the mechanical bells in these phones
They are, i JUST checked. I have an old(ish) handset and you can switch it between tone dialing and pulse dialing. Just seen your comment and remembered i had it in the bottom of a box lol. So, out of curiosity and to answer your question, they do still accept pulse dialling. It took a while to dial tho as you would expect anyway. Hope this helps Ill maybe make a video and upload it.
I used to work for Dell tech support back when the 56k modem was the norm. We used to get a lot of calls from people saying that they had problems connecting to the internet. One of the first questions was how many phones were on the line. Had to explain the whole REN thing and get them to check on their phones for the REN value. Some people would understand and go test with less phones on the line and others would be screaming for an engineer NOW lol.
Also, when I was a teen our phone used to have a physical lock on the keypad to stop us running up massive bills. Used to be able to bypass it by dialling though the hangup.
13:32 No, the 74-series is a family of TTL integrated circuits. The 74595 is a shift register. :) The letters between 74 and the number is the type. HC = High speed CMOS.
The 74HC85 is a 4-bit magnitude comparator. It can answer the rather simple question: Is A less, equal or greater than B, where A and B are 4-bit binary numbers (or BCD). Simple question, but it's not easy to build with logic gates.
The 74HC4040 is a 12.stage ripple counter.
Cheers Robert, I stand corrected! 😁
Thanks for documenting this device here on RUclips. A really good video! Would love to be able to have a wee play around with British telephones... I bet as this equipment wasn't intended for the general public (at least it looks like lineman tools) they're likely uncommon to come across though. :-(
Randomly, I should have another video up in the next few days of a TELEX type device that you might find interesting!
I wonder if the exchanges are still setup for pulse dialling, I saw an old phone in an antiques shop this week, would be interesting if it could still be used.
I might have a look and see if I can grab one.
Some of them retain this feature however with the rise of broadband ect, exchange space is a premium. You can still buy a modern rotary phone which has a built in electronic dialer behind the rotor to overcome this issue, but another feature on the way out is the bell wire, which used to ring the mechanical bells in these phones
They are, i JUST checked. I have an old(ish) handset and you can switch it between tone dialing and pulse dialing.
Just seen your comment and remembered i had it in the bottom of a box lol.
So, out of curiosity and to answer your question, they do still accept pulse dialling.
It took a while to dial tho as you would expect anyway.
Hope this helps
Ill maybe make a video and upload it.
How can I obtain what you are demonstrating?
Totally forgot about the tunes, 1 2 3 1, 1 2 3 1, 3 6 9 ,3 6 9.
Don't buy the BBT Decor 2600/ It has a major fault, IT DOES NOT RING!!!! Chinese, which tells you all you need to knw!