A synchronization scheme for bidirectional data applications where the customer supplies data for transmission at a rate which is customer controlled. In accordance with the present invention, in each transmission direction, the customer data is converted into data symbols in a predetermined constellation....http://www.google.es/patents/US5521949?utm_source=gb-gplus-sharePatente US5521949 - Synchronization scheme for digital communications systems transporting data at a customer-controlled rate
Synchronization scheme for digital communications systems transporting data ...