Broadband subscriber loop system and ATM switching system are the key equipment for construction of Broadband networks. In this paper, we describe the architecture of access network and the implementation of ATM switching system with multi-service interface for construction of broadband access network. We also represent the design of MAIN-AN (Multi-service Access Integrated Network--Access Node) system as integrated access network platform which enables to accommodate ATM/SDH-based and ATM/PON-based FTTx (Fiber-To-The-x) access architecture simultaneously. The system has a Cross-point ATM Switch Fabric with 10 Gbits/sec throughput and it has been implemented using 0.5 µm CMOS technology. For performance evaluation of it, we simulate it under burst traffic conditions. In addition, we show the implementation of prototype of ASIC (Application Specific Integrated Circuit), MAIN system and its core PBA (Printed circuit Board Assembly) and so on.