Southern Railfan

I just love to watch trains and explore the history of Telephone Exchanges.

Saturday, January 21, 2017

IP-PBX


Posted by Southern Railfan at 8:15 PM
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Labels: 5ESS, 5PH, Alcatel-Lucent, Alcatel/Lucent 5ESS, ATT/Philps Tel 5ESS-PBX Host, Off hook Tone, PBX, Telephone Company, Telephone Exchange, Telephone Line, Telephone Switches
Location: Concord, TN 37934, USA

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