00476nam a2200121Ia 450000500170000010000180001724500580003526000090009352002100010258300190031294200060033199900170033720260716043301.0  aCawkell, A.E.  aTelecommunications - where the action is and will be.  c1990  aConsiders the subject at two levels - the technical, and the political and social.  Covers topics such as data broadcasting, modems and PABXs, fibreoptics, specialised networks, public networks, standards.  c3/7/00kM2LMGR  cA  c44084d44084