Synchronous Mode Synchronous systems negotiate the connection at the data-link level before communication begins Basic synchronous systems will begins. synchronize two clocks before transmission. Asynchronous mode Asynchronous systems do not send separate information to indicate the encoding or clocking information. The receiver must decide the clocking of the signal on it's own. This means that the receiver must decide where to look in the signal stream to find ones and zeroes. | m ATM 7 19 2010 1 Fast Relay Networks Relaying traffic as quickly as possible Fast Relay Frame Relay Cell Relay Variable size PDUs - frames Fixed size PDUs - cells SVC LAPD ATM based based For B-ISDN For SMDS PVC SVC 7 19 2010 2 Transfer Mode Transfer mode Specific way of transmitting and switching through the network Synchronous Mode Synchronous systems negotiate the connection at the data-link level before communication begins. Basic synchronous systems will synchronize two clocks before transmission. Asynchronous mode Asynchronous systems do not send separate information to indicate the encoding or clocking information. The receiver must decide the clocking of the signal on it s own. This means that the receiver must decide where to look in the signal stream to find ones and zeroes and decide for itself where each individual bit stops and starts. 7 19 2010
