DIN EN 301669:2001-12
Действует
Fixed Radio Systems - Point-to-point equipment - High capacity digital radio systems carrying STM-4 in two 40 MHz channels or 2 x STM-1 in a 40 MHz channel with alternate channel arrangement (Endorsement of the English version EN 301669 V 1.2.1 (2001-02) as German standard)
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