Universal Personal Telecommunication (UPT); The service concept; Part 2: General service description
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Universal Personal Telecommunication (UPT); The service concept; Part 3: Service aspects of charging, billing and accounting
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Universal Personal Telecommunication (UPT); The service concept; Part 4: Service requirements on security mechanisms
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Universal Personal Telecommunication (UPT); The service concept; Part 5: Types of UPT terminals and access devices
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Universal Personal Telecommunication (UPT); The service concept; Part 6: Subscriptions and service profiles
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Universal Personal Telecommunication (UPT); The service concept; Part 6: UPT subscriptions, service profiles and information model
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Universal Personal Telecommunication (UPT); The service concept; Part 6: UPT subscriptions, service profiles and information model
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Universal Personal Telecommunication (UPT); The service concept; Part 7: User procedures and user states
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Universal Personal Telecommunication (UPT); The service concept; Part 7: User procedures and user states
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Universal Personal Telecommunication (UPT); The service concept; Part 8: Man-machine interface aspects
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