Question 12/XVII - Comparative tests of data communication equipments
for use
over telephone-type circuits
(Continuation of Question 12/XVII, 1985-1988; revised wording)

Study of points arising from the implementation and permanent updating
of Recommendation V.56. Particular points for further study are:

a) Parameters of the line characteristics simulator.

The latest standard of the M- and H-Series Recommendations and other
relevant standards must be observed and the values of the line
characteristics simulator shall be adopted to these.

b) Completion and updating of the test parameters

As the modem technology becomes more sophisticated with the higher data
signalling rates and new additional facilities
(e.g. error control, data compression, etc.) these devices may be
affected by parameters that are not clearly evident today. Information
is continuously requested when new aspects that affect modem operation
arise so that the standard test setup can be updated.