Friday, April 26, 2013

Telephone ATT/Philps Tel 5ESS-PBX Host step by step tones. - Video Dailymotion

Telephone ATT/Philps Tel 5ESS-PBX Host step by step tones. - Video Dailymotion 
     This is a Step By Step tone for the Telephone Switch Type: ATT/Philps Tel 5ESS-PBX Host.
I still wanna know what kind of ROH tone that is. I still wanna know the Technical name for this tone and What kind of Device or equopment this is.

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