Patent ID: 6980590
Filing Date: 2005-12-27
Classification: H04L,H04M

Abstract:
1. A method for use by a first modem to establish a data communication session with a second modem, said method comprising: calling said second modem via a telephone line; starting a physical handshaking process with said second modem; transmitting a pseudo-randomly generated code word to said second modem during said physical handshaking process; receiving a scrambled code word from said second modem, wherein said scrambled code word is generated by scrambling said code word during said physical handshaking process; analyzing said scrambled code word during said physical handshaking process; determining if said second modem meets a compatibility criteria based on said analyzing during said physical handshaking process; and exchanging identification data with said second modem if said determining determines that said second modem meets said compatibility criteria, wherein said identification data are indicative of a manufacturer identity of said first modem and a particular modem version number of said first modem.