The worst thing about breaking up the Bell System in 1983 (AT&T) was it created the entire telephone spam / scammer industry.

#BellSystem #ATT

@thanosengine This sounds super cool!

You may be aware of this, but @SDF has a private (as in not connected to PSTN) but open VOIP SIP network, and there's a fair bit of interesting old gear attached to it.

Not sure how up-to-date this page is, but it's a start:
https://sdf.org/?tutorials/sdf_voip_ext

At one point someone had a working 1A2 Key System connected into it.
#phone #BellSystem #hardware #SDF

#HamRadio #Coldwar #History #AT&T #Longlines #BellSystem

https://en.wikipedia.org/wiki/Project_Greek_Island

https://www.washingtonpost.com/wp-srv/local/daily/july/25/brier1.htm

https://ahf.nuclearmuseum.org/ahf/history/greenbrier-bunker/

#BellSystem #Telephone #History #AT&T

Before the widespread deployment and implementation of 911 in the United States the Bell Telephone company assigned a key word to east state police office.

In Minnesota you could dial ZERO for an operator and ask for Zenith 7000 and be transferred to the local state patrol office free of charge.

If you know your key word for your area post it below.

Picked up a Bell System van coin bank to decorate my workspace a bit! #2600 #phreaking #bellsystem #phones

Emergency Repair in the No. 5 Crossbar

https://www.youtube.com/watch?v=v3qKW7cHeaE

#Telephone #Switching #BellSystem

#ConnectionsMuseum

#BellSystem #Fire #Restoration

Reconnecting 170,000 Phone Customers in NYC After a Major Fire - AT&T Archives

https://youtu.be/f_AWAmGi-g8

#1960 #bellsystem

#History #Opinion

Before accepting the consent decree to be broken up AT&T and the Bell System employed over one million people.

It is my belief that CEO Brown accepted the "deal" in order to shed its single biggest cost liability, wages.

He knew that digital switching along with optical transport was just around the corner and a large percentage of these employees would no longer be needed.

I offer equal time for an opposing view.

#AT&T #BellSystem #Telephone

In 1972 fifty #Phone #Phreaks where arrested nationwide and only 20 where convicted.

#Telephone #BellSystem #History

@ThinkingSapien

#2600 hertz (2600 Hz) is a frequency in hertz (cycles per second) that was used by #AT&T as a steady signal to mark currently unused long-distance telephone lines.

During the 1960s, in-band signaling was used, so the same line for both voice conversations and telephone connection management signals. The solution AT&T created was to produce a 2600 Hz tone on idle trunks.

#Phone #Phreaking #BellSystem

#BellSystem #5A #Crossbar

The Traveling Central Office - Available in a 1,000 line configuration or a 2,000 line configuration.

https://youtu.be/TsWnidyQE9M

Bought myself an *avocado* Trimline phone for @SDF voip, hopefully it works my voip box dosent get here till Saturday. #phone #bellsystem