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Standards [CURRENT]

DIN ETS 300191

Private Telecommunication Network (PTN); signalling protocol at the S-reference point; identification supplementary services; English version ETS 300191:1992
Edition 1993-09

Standards [CURRENT]

DIN ETS 300192

Private Telecommunication Network (PTN); signalling protocol at the S-reference point; circuit mode basic services; English version ETS 300192:1992
Edition 1993-09

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DIN ETS 300191

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