DIN EN 300778-1:2001-12
Отменен
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)
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