Abstract This paper investigates the performance of the AAL2 packet voice multiplexer as a function of the transmission capacity of the ATM VC when the ATM VC bandwidth utilization is constant. A conclusion is drawn that packet delay and probability of packet loss will decrease when the transmission capacity of the ATM VC increases. Finally, an implementation of AAL2 packet voice multiplexer is presented which can easily multiplex the voice calls from multiple El voice circuit.