Question 14/III - Tariff principles for the international Teletex
service (continuation of Question 15/III studied in 1985-1988)

(To be studied in liaison with Study Group I and other relevant Study
Groups.)

Study of possible amendments and additions to Recommendation D.50
relating to charging and accounting in the international Teletex
service.

Reasons for the study

This Recommendation will require continuing study in the light of
experience and new developments in telecommunications.

Future studies of the international Teletex service should include:

-interworking between networks of different types (PSPDN, CSPDN, PSTN
and ISDN) in direct and in transit relations;

- - - - - - - - - - - - - - -
1 The definition and description of Telefax 4 are given in
Recommendation F.184.

-complementary network facilities available to subscribers (including
Message Handling Service based on the X.400-Series of Recommendations);

-interworking with other services (with the telex service and other
services such as Telefax and Videotex);

- mixed mode operation;

- interconnection of telex-Teletex-conversion facilities.