Toll Frame 1973
Toll frames were generally used when circuits going from one point to another needed amplification or had to use an intermediate switching system.
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Uploaded on April 7, 2007
Taken on November 1, 2007
Toll Frame 1973
Toll frames were generally used when circuits going from one point to another needed amplification or had to use an intermediate switching system.
2,138
views
2
faves
1
comment
Uploaded on April 7, 2007
Taken on November 1, 2007