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ETSI EN 301 669
- 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
- standard by European Telecommunications Standards Institute, 02/01/2001
- Publisher: ETSI
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To insert in the mentioned EN's resp.ETS's for P-P radio relay systems a subsection on CW components wihin the section of the spectrum mask