Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] NBAR (Network Based Application Recognition) Network Module (NM) networks convergence home use of VoIP PSTN signaling telephony types of voice NM (Network Module) number of required trunks, calculating numbers of rings sequences Nyquist Theorem 2nd |