What is the difference between Frame Relay and ATM?
Frame Relay has a variable length packet (frame) whose size depends upon the amount of information transmitted and ATM uses a fixed length packet (a 53-byte cell). The switching of cells enables information to be switched very quickly in hardware and has the ability to intermingle data, video, Internet and voice without compromising the unique need of each application. 3. How do I find out where ATM is available? ATM network disclosure is available at: http://www.qwest.com/disclosures/netdisclosure400/index.html 4. What are PPD and EPD? PPD stands for Partial Packet Discard and EPD stands for Early Packet Discard. PPD and EPD are the commonly used industry terminology for intelligent frame discard capability as an optional congestion recovery procedure. EPD is a packet discard mechanism congestion control technique that discards every cell from an ATM Adaptation Layer 5 (AAL5) Packet Data Unit (PDU) when an ATM device buffer overflows. It prevents cells from entering the buffer, reserv
