poor quality voice and the 32 byte payload which could Asynchronous Transfer Mode: transmit voice without echo but provided inefficient data transfer. The 48 byte payload size allows ATM to carry multiple forms of traffic. Both time-sensitive traffic (voice) and time-insensitive traffic can be carried with the best possible balance between efficiency and packetization delay. ATM Advantages: 1. ATM supports voice, video and data allowing multimedia and mixed services over a single network. 2. High evolution potential, works with existing, legacy technologies 3. Provides the best multiple service support 4. Supports delay close to that of dedicated services 5. QoS (Quality of Service)classes 6. Provides the capability to support both connection-oriented and connectionless traffic using AALs(ATM Adaptation Layers) 7. Able to use all common physical transmission paths (DS1,SONET) 8. Cable can be twisted-pair, coaxial or fiber-optic 9. Ability to connect LAN to WAN 10. Legacy LAN emulation 11. Efficient bandwidth use by statistical multiplexing 12. Scalability 13. Higher aggregate bandwidth 14. High speed Mbps and possibly Gbps Asynchronous Transfer Mode: ATM disadvantages: 1. Flexible to efficiency's expense, at present, for any one application it is usually possible to find a more optimized 2. Technology 3. Cost, although it will decrease with time 4. New customer premises hardware and software are required 5. Competition from other technologies -100 Mbps FDDI, 100 Mbps Ethernet and fast ethernet 6. Presently the applications that can benefit from ATM such as multi...
