66 block cross connect panel in the PBX
![66 block cross connect panel in the PBX](https://farm3.static.flickr.com/2736/4218404346_8fdc3c69f2.jpg)
Electromechanical PBXs were notorious for being wire hogs - some of the office phones probably each required their own 66 block - with 25 pairs of wires. Guest rooms were all four conductor connections, with the extra pair used for the message waiting indicator.
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Last of the Mohicans
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X-Resolution | 72 dpi |
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Y-Resolution | 72 dpi |
Exposure | 0.017 sec (1/60) |
Aperture | f/3.5 |
Exposure Bias | 0 EV |
Focal Length | 18 mm |
Focal Plane X-Resolution | 4433.295337 dpi |
Focal Plane Y-Resolution | 4453.608247 dpi |
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