A new ATM adaptation layer (AAL) called AAL2 has been standardized. This AAL2 is designed to carry low-bit-rate voice signals. This paper investigates bandwidth management in AAL2 networks mainly from the traffic performance point of view. Three alternatives for bandwidth management (i.e., which ATM layer service is used and how admission of AAL2 connections to a VC is judged) are shown, and their performance is evaluated theoretically.
The alternative that uses UBR VCs and judges admission of AAL2 connections to a VP had the best performance. The advantage of using VBR is shown to be limited.