ABSTRACT
The role of asynchronous transfer mode (ATM) technology in modern telecommunications can be viewed in the context of broadband demand, anticipated requirement of existing and futuristic networks, and the expected evolutions in teletransfer techniques. Its logical level management blended with fiber-optics-based physical level transmissions render ATM networking a comprehensive conception of the Gbps rate communication platform, offering varying levels of service guarantees. As the ATM concept was brought into practice, an imminent application that was foreseen was implementing ATM local area network. Structured circuit emulation establishes an AAL-1 N × 64 kbps circuit, such as a fractional T-1 or E-1 over the ATM backbone. Multiprotocol over ATM splits the traditional role of the router into two roles by off-loading packet forwarding from the router to the hosts and edge devices. The interworking function for ATM trunking using AAL-1 provides a call-by-call switched service to the narrowband network.
