Strowger Automatic Telephone Exchange. Known as a “Bullseye Strowger” ca. 1899-1900. Notice the celluloid patent disc in the center of the bottom battery box.

Strowger Automatic Telephone Exchange. Known as a “Bullseye Strowger” ca. 1899-1900. Notice the celluloid patent disc in the center of the bottom battery box.

E. E. Haynes owned and operated the Telephone Exchange in Rio Vista, Texas from 1917 to 1944. Submitted by G. Alan Galleries.

E. E. Haynes owned and operated the Telephone Exchange in Rio Vista, Texas from 1917 to 1944. Submitted by G. Alan Galleries.

Telephone exchange chaining in the 1970s - a form of phone phreaking

Telephone exchange chaining in the - a form of phone phreaking

This BT-owned telephone exchange is notable as it contained one of the last working Strowger (electro-mechanical) exchanges to be taken out of service in Scotland. Description from geograph.org.uk. I searched for this on bing.com/images

This BT-owned telephone exchange is notable as it contained one of the last working Strowger (electro-mechanical) exchanges to be taken out of service in Scotland. Description from geograph.org.uk. I searched for this on bing.com/images

German prisoners, captured by the Polish Home Army during the Warsaw Uprising of August to October 1944, at the city's central telephone exchange. Original Publication: Picture Post - 9259 - Pictures From The Grave - pub.1957 - pin by Paolo Marzioli

German prisoners, captured by the Polish Home Army during the Warsaw Uprising of August to October at the city's central telephone exchange. Original Publication: Picture Post - 9259 - Pictures From The Grave - - pin by Paolo Marzioli

Robbie Cain: Was this the off hook tone for Parson Greene Telephone Exchange in Parson TN?

Robbie Cain: Was this the off hook tone for Parson Greene Telephone Exchange in Parson TN?

Electricity Photograph - Firman Telephone Exchange Patent Art 1882 Blueprint by Ian Monk

Electricity Photograph - Firman Telephone Exchange Patent Art 1882 Blueprint by Ian Monk

Robbie Cain: Was this the step by step tones after finishing a call for Parson Green Telephone Exchange in Parson TN?

Robbie Cain: Was this the step by step tones after finishing a call for Parson Green Telephone Exchange in Parson TN?

Robbie Cain: Was this the step by step tones for Halls Telephone Exchange INC in Halls Crossroads TN

Robbie Cain: Was this the step by step tones for Halls Telephone Exchange INC in Halls Crossroads TN

Robbie Cain: Was this the step by step tones for Parson Greene Telephone Exchange in Parson TN?

Robbie Cain: Was this the step by step tones for Parson Greene Telephone Exchange in Parson TN?

Telephone exchange - Wikipedia

A telephone exchange is a telecommunications system used in the public switched telephone network or in large enterprises. Shown is a 1924 PBX telephone switchboard on display at the Atlanta History Center in Atlanta, Georgia.

Robbie Cain: Was this the off hook tone for Halls Telephone Exchange INC in Halls Crossroads TN?

Robbie Cain: Was this the off hook tone for Halls Telephone Exchange INC in Halls Crossroads TN?

Telephone Switchboard circa 1900. 10 line manual telephone exchange made by the National Telephone company.

Telephone Switchboard circa 10 line manual telephone exchange made by the National Telephone company. I used o b e like this when I worked for the hospital in 1980

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