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DIN ETS 300116
Public Switched Telephone Network (PTSN) - Category II specification for 1200 bits per second duplex modems standardized for use on the PSTN; English version ETS 300116:1996
Edition
1997-08
DIN ETS 300114
Public Switched Telephone Network (PSTN) - Basic Category I and Category II specifications for modems standardized for use on the PSTN; English version ETS 300114:1996
Edition
1997-08