ITU-T E.130: Choice of the Most Useful and Desirable Supplemtary Telephone Services
SDO: ITU-T: International Telecommunication Union/ITU Telcommunication Sector
DOD Adopted ANSI Approved Approved
The best choice of a supplementary service to be introduced depends basically on the individual situation of a country. This Recommendation only gives guidelines which should be carefully appraised by the respective Administration.
It is suggested that a choice might be made from services which are defined in the list of Supplementary Services (see Supplement No. 1 at the end of this fascicle). Supplement No. 1 aims to provide only outline information about the supplementary services included, in order to give Administrations a broad idea of the nature of these services. § 1 of the Supplement deals with those services considered to have international implications and seeks to specify these implications for each of the services concerned. § 2 of the Supplement deals with those services not considered to have international implications. Appendix I to the Supplement deals with those services not considered as supplementary.
The experience gained with these services by Administrations which have already introduced the relevant service is given in the form of remarks and market data within this list.
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