The United ASrab Emirates' (UAE) Emirates Telecommunications Corp (Etisalat) is investing about 5 billion dirhams ($1.36 billion) to boost fiber optic coverage across the country by 2011, its chairman said on Tuesday. Etisalat, the Arab world's second-biggest telecoms firm, has faced increased competition in its home market after its monopoly was broken in 2007 by Dubai-based du.