ABSTRACT -- In this paper, we present an investigation of ATM network technologies for IMT-2000. Our study work will focus on the ATM deployment in co-operate with IMT-2000. We first show some limitations of AAL-1 when it is used for carrying low bit rate voice. In contrast, when assessing the use of AAL-2 for carrying low bit rate voice, AAL2 offers a number of advantages when compared with AAL-1. We briefly reviewed network architecture issues related to internetworking model. We have addressed some challenging issues which may be concerned for future research topics.

KEYWORDS -- ATM, IMT-2000, Mobile, Wireless, Internetworking