I just love to watch trains and explore the history of Telephone Exchanges.
Tuesday, April 8, 2014
ATT/Philps+Tel+5ESS-PBX+Host+step+by+step+tones+after+finishing+a+call
ATT/Philps+Tel+5ESS-PBX+Host+step+by+step+tones+after+finishing+a+call
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