Transmitter and receiver synchronization for wireless telemetry systems

A method of transmitting data along tubing in a borehole, the method comprising the steps of: (i) transmitting an acoustic message containing data by a first modem at a first location on the tubing at a first frequency and a first bit rate selected from a predetermined group of at least two frequencies and at least two bit rates; (ii) receiving the acoustic message by a second modem at a second location on the tubing, and detecting the first frequency of the acoustic message by receiver electronics of the second modem; and (iii) synchronizing the acoustic message with the detected first frequency and in parallel with at least two bit rates by the receiver electronics of the second modem. 7876415_1 (GHMatters) P94886.AU 25Mi-2 2 d6 25Mi-H 28c tlz ,26 lz X/, -29 -28b /7-13 25Mi+8W 20