1. Also learning sequence. A special sequence sent by one modem to another prior to the commencement of a data transfer. The sequence commonly consists of phase reversals and/or 1-bits and is intended to permit the receiving modem to obtain synchronization/equalization in the shortest possible time. It is the usual first element of a poll response by a remote site modem in a multipoint, binary synchronous system. Depending upon the protocol and type of modems, sequences can be from about 20 milliseconds in length to about 250 milliseconds.
