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ITU-T E.300 Supplement 1 List of possible supplementary telephone services which may be offered to subscribers
ITU-T E.300 Supplement 3 North American precise audible tone plan
ITU-T E.300 Supplement 4 Treatment of calls considered as 'Terminating abnormally'
ITU-T E.300 Supplement 6 Preparation of information to customers travelling abroad
ITU-T E.300 Supplement 7 Description of INMARSAT existing and planned systems
ITU-T D.5 Costs and value of services rendered as factors in the fixing of rates
ITU-T D.8 Special conditions for the lease of international end-to-end digital circuits for private service
ITU-T D.9 Private leasing of transmitters or receivers
ITU-T D.12 Measurement unit for charging by volume in the international packet-switched data communication service
ITU-T D.13 Guiding principles to govern the apportionment of accounting rates in international packet-switched public data communication relations
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