Digital local, transit, combined and international exchanges in integrated digital networks and mixed analogue-digital networks : supplements: recommendations Q.500-Q.554 / International Telecommunication Union

PLENARY ASSEMBLY, IX, Melbourne, 1988; UIT

Geneva: ITU, 1989

X, 182 p. ; 30 cm

Blue Book. Fasc. VI.5; Vol. VI

92-61-03491-8

Vária

Serviços-de-Telecomunicações; Centrais digitais; Redes-Digitais

1989

Material Textual Impresso

ENG