5-2
Issue 1 April 1994
is simply a matter of selecting a telephone icon on the
originating side; some applications require that you type a
command. Answering may be automatic, or may require some
user action.
Although the connection is already made, the DataPort 2001s
make it appear to the applications that a new phone call is being
initiated and answered. The users are now in a VoiceSpan
session. While their DTE applications can send data back and
forth, the users can also simultaneously communicate by voice.
The following pictures show the beginning of a typical
VoiceSpan session.
1) Working at home,
Chris telephones his
colleague Jan to discuss
an upcoming multimedia
presentation.
2) After a few minutes they
realize it would be useful to
view the images they are
discussing.
3) Using his PC, Chris
initiates a call to Jan’s
number.