Example at work: Calling from the office

to someone who is a POTS subscriber

Long Description: The first image is a TTY logo -- indicating that a TTY call will be made using VoIP. How will it connect? Will the codec support it? Next is an image of the information being changed to 0's and 1's and carried along the "information highway" -- the IP network. How much error will there be? Next the information passes through a gateway. Next the information is passed to a PSTN, and then it reaches a TTY on the other end.