pdf AE H610061 May 1957 Intertoll Transmission Trunk Circuit Popular
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AE-H610061_May-1957_Intertoll_Transmission_Trunk_Circuit.pdf
From the collection of the JKL Museum of Telephony
Scanned and uploaded by Remco Enthoven
AE H610061 May 1957 Intertoll Transmission Trunk Circuit Loop Dialing
Booster Battery Ring Control Reverse Battery Suoervision Coin Control
Automatic Electric 8-5-57 H-610061
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