General characteristics of international telephone connections and circuits : recommendations G.100 - G.181 / International Telecommunication Union

PLENARY ASSEMBLY, IX, Melbourne, 1988; UIT

Geneva: ITU, 1989

XVIII, 309 p. ; 30 cm

Blue Book. Fasc. III.1; Vol. III

92-61-03321-0

Vária

Serviços-de-Telecomunicações; Circuitos telefónicos

1989

Material Textual Impresso

ENG