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ETSI ETR 221

Universal Personal Telecommunication (UPT); Phase 1 (restricted UPT service scenario); Supplementary services
standard by European Telecommunications Standards Institute, 11/01/1995
Publisher: ETSI

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Specification of UPT supplementary services foreseen in UPT phase 1.

Product Details

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Integrated Services Digital Network (ISDN); Three-Party (3PTY) supplementary service; Digital Subscr..

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Integrated Services Digital Network (ISDN); Generic functional protocol for the support of supplemen..

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Terminal Equipment (TE); File transfer over the Integrated Services Digital Network (ISDN); Conforma..

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