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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