Regardless of ownership, the phone company controlled all aspects of placing and receiving a phone call-from the instrument on your desk or in your home to the switching equipment and long distance lines. In the beginning, there was "the phone company," usually, but not always, part of AT&T. After a long and uncomfortable silence, she asked, "Well then, which is it, a phone or a computer?"Īnswering the question of what is a computer and what is still a telephone may be as good a place as any to begin to sort out the technical and accessibility challenges that are presented as voice communications technology moves from the familiar domain of "the phone company" to an almost endless array of services, such as Vonage and Skype, operating on an almost-limitless system of home networks, office systems, the open Internet, and specialized digital networks like MPLS (multiprotocol label switching) and cloud networks. I then showed her the SIP (session initiated protocol) box that I have for my own VoIP line. I did my best to tell her that all phone calls travel most of the distance from you to the other party as digital data and explained patiently that you can use the Internet to digitize your calls as you place them, rather than use the phone company.
I recently had an opportunity to try to explain VoIP (voice over Internet protocol) technology to a friend who is still trying to understand exactly what caller ID is.
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