ITU-T E.109 International Billed Number Screening Procedures for Collect and Third-Party Calling - Telephone Network and ISDN - Operation, Numbering, Routing and Mobile Service (Study Group 1) 8 pp
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ITU-T E.109 Document Information:
Title
International Billed Number Screening Procedures for Collect and Third-Party Calling - Telephone Network and ISDN - Operation, Numbering, Routing and Mobile Service (Study Group 1) 8 pp
International Telecommunication Union/ITU Telcommunication Sector
Publication Date:
Jan 1, 1995
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