Public Switched Telephone Network (PSTN) - Protocol over the local loop for display and related services - Terminal Equipment requirements - Part 1: Off-line data transmission; English version ETS 300778-1:1997
Access and terminals (AT) - Analogue access to the Public Switched Telephone Network (PSTN); Protocol over the local loop for display and related services; Terminal Equipment requirements - Part 1: On-hook data transmission (Endorsement of the English version EN 300778-1 V 1.2.1 (2001-05) as German Standard)— 1 стр.
