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Here, RS-II model of brane-gravity is considerd for phantom universe usingnon-linear equation of stste. Phantom fluid is known to violate the weak energycondition. In this paper, it is found that this characteristic of phantomenergy is affected drastically by the negative brane-tension $\lambda$ of theRS-II model. It is interesting to see that upto a certain value of energydensity $\rho$ satisfying $\rho/\lambda < 1$, weak energy condition is violatedand universe super-accelerates. But as $\rho$ increases more, only strongenergy condition is violated and universe accelerates. When $1 < \rho/\lambda<2$, even strong energy condition is not violated and universe decelerates.Expansion of the universe stops, when $\rho = 2 \lambda$. This is contrary toearlier results of phantom universe exhibiting acceleration only.

Non-linear Equation of State, COSMIC Acceleration and Deceleration During Phantom-Dominance