Passive optical networks were first proposed by in 1987. Two major standard groups, the (IEEE) and the of the (ITU-T), develop standards along with a number of other industry organizations. The (SCTE) also specified f.
[pdf] Telecommunications in consists mainly of , analog,,,, and , and the. Telephone service is provided through (Telecommunications Company of Cuba), mobile telephone service is provided through the Cellular Telephone Company of Cuba (CUBACEL) and, previously, Caribbean Cellular (Celulares del Caribe, C-COM - no longer operating). Cuba's main international telecommunications links are through,.
[pdf] 
