00891nam0-22003251i-450-99000051557040332120080123155144.00-471-62056-4000051557FED01000051557(Aleph)000051557FED0100005155720020821d1991----km-y0itay50------baenga-------001yyDigital telephonyJohn Bellamy2nd ed.New YorkWiley & sonsc1991XIX, 572 p.ill.24 cmWiley series in telecommunicationsSistemi telefonici digitali621.385Bellamy,John<1941- >5384ITUNINARICAUNIMARCBK99000051557040332110 E II 523dee 1398DINELDINELDigital telephony331131UNINA