the potential of cordlessness, in terms of its potential demand on house and gardens, the combination of low cost and freedom of use radio spectrum when the number of cordless terminals exceeded made the idea an instant success; they sold in their millions and still about 10% of normal wired terminals. This vision resulted in the following standard, that has been adopted in most CEPT affiliated The success was exported to Europe by way of illegal imports into countries, with the exception of the UK and France who chose the the UK, France, Germany, Holland, etc. These imports infringed h.f/v.h.f. option that offered a significantly lower production cost. local telecommunications law and practice. In the UK, for example, The CEPT standard has the following general characteristics: the frequencies chosen for North American were allocated to ma- ritime and the then broadcast television service. Furthermore their 1. Analogue FM operation. transmission characteristics gave unsatisfactory speech perfor- 2. Forty 25kHz duplex channels in the frequency bands 914 mance when they were connected to European public telecommuni- 915MHz paired with 959-960MHz. cations networks. Nevertheless the quantity of illegal imports 3. Radiated power limited to 10mW. demonstrated that a market existed for such a product and conse- 4. Dynamic channel selection (DCS) on call set up. quently the European PTT's reacted by adopting appropriate stand- ards for Europe. From this beginning the present cordless market is This last feature sets apart this standard from the earlier technol- now on the verge of making a significant breakthrough as a natural ogy. On call set up either from a base (incoming call) or handset telephone terminal apparatus in both the home, office and manufac- (outgoing call) all forty channels are scanned in order to select a turing environments. vacant radio channel, or one where the co-channel interference is acceptable low, on which to set up the telephone call. 49.1.1 Analogue technology This feature has a complexity 