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ÖNORM EN 300453 V 1.2.1:2001-11

Действует
Access and Terminals (AT) - Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S) - Terminal equipment interface
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Ссылочные документы

ISO/IEC 8877:1992
Действует
Information technology; telecommunications and information exchange between systems; interface connector and contact assignments for ISDN basic access interface located at reference points S and T — 16 стр.
ÖNORM EN 300453 V 1.2.1:2001-11
Действует
Access and Terminals (AT) - Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S) - Terminal equipment interface

На этот документ ссылаются

ÖNORM EN 300453 V 1.2.1:2001-11
Действует
Access and Terminals (AT) - Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S) - Terminal equipment interface
ÖNORM EN 300452 V 1.2.1:2001-11
Действует
Access and Terminals (AT) - Special quality voice bandwidth 4-wire analogue leased line (A4S) - Connection characteristics and network interface presentation