ITU-T RECOMMENDATION E.115 � COMPUTERIZED INFORMATION SERVICE FOR TELEPHONE SUBSCRIBER NUMBERS IN FOREIGN COUNTRIES (DIRECTOR ASSISTANCE), RESERVED FOR OPERATORS
    1 Preamble
    2 Methods of obtaining information
    3 General principles applicable to the various methods of obtaining information
    4 Principles for the organization of an interconnected computerized international information service
    5 Description of the standards used for inquiry and response
    6 Charges
ANNEX A � Directory services interconnect bearer services
    A.1 Introduction
    A.2 Identification
    A.3 Network interconnection
ANNEX B � Formal definitions of directory messages
References