DS EN 301021:2005 Fixed Radio Systems - Point-To-Multipoint Equipment - Time Division Multiple Access (Tdma) - Point-To-Multipoint Digital Radio Systems In Frequency Bands In The Range 3 Ghz To 11 Ghz Provides equipment, which may operate in frequency bands that have paired frequencies, which can be used by either equipment employing Frequency Division Duplex (FDD) or Time Division Duplex (TDD) tec