M/M/m: finite system capacity, m special case 3 m 2u forn=0,1,2,,m ∑ Probability of full system, Pm, is"Erlang's loss formula Exactly same expression for Pn of M/G/m system with KemM/M/m: finite system capacity, m; special case! …… 0 1 2 m-1 m l l l l l 3m m 2m (m-1)m mm for n m i n P m i i n n 0, 1, 2,... ! ( ) ! ( ) 0 = = å = m l m l • Probability of full system, Pm, is “Erlang’s loss formula” • Exactly same expression for Pn of M/G/m system with K=m