Recommendation B.151) 
                             NOMENCLATURE OF THE FREQUENCY AND WAVELENGTH BANDS
                                         USED IN TELECOMMUNICATIONS
               The CCITT,
         considering
               (a) that the merits of Heinrich Hertz (1857-1897), as a research worker  on
         the basic phenomena of radio waves, are universally recognized, as was  confirmed
         at the centenary of his birth; and that as early as  1937  the  IEC  adopted  the
         hertz (symbol: Hz) as  a  name  for  the  unit  of  frequency  (see  inter  alia,
         Publication 27);
               (b) that the nomenclature in this Recommendation should be as  synoptic  as
         possible and that the designation of frequency bands  should  be  as  concise  as
         possible,
         recommends
               (1) that the hertz (Hz) be accepted for use in publications of the ITU,  as
         the name for the unit of frequency in accordance with Recommendation B.3  on  the
         use of the international system of units (SI);
               (2)  that  Administrations  should  always  use  the  nomenclature  of  the
         frequency and wavelength bands given in Annex A:
               -   Table A-1/B.15 and Notes 1 and 2, which take account of No. 208 of the
                  Radio Regulations, and
               -   Note 3, which contains the proposal of the International Union of Radio 
                  Sciences (URSI),
         except  in  those  cases  where  this  would  inevitably   cause   very   serious
         difficulties.
                                                   ANNEX A
                                      (to Recommendation B.15)
         Note: Tables A-1/B.15 to A-3/B.15 are missing




































         1)      A similar text will be submitted to the  CCIR  as  a  revision  of  Recommendation
         431-4.



         Fascicle I.3 - Rec. B.15                  PAGE1