Patent ID: 7130337

Claim:
A method of synchronizing a digital transmission of analog modem signals, comprising: receiving, at a second modem, a first digital data signal from a first modem via a transmission medium, wherein: said first digital data signal is received serially, and said first digital data signal comprises a first sample clock signal, said first sample clock signal comprising a first start bit representing a delay; detecting said first start bit by said second modem; generating, by said second modem, a first recreation clock signal based on said first start bit, wherein said first recreation clock signal comprises said delay; converting said first digital data signal to a first analog signal by a first digital-to-analog converter; generating, by said second modem, a second analog signal, said second analog signal comprises a second sample clock signal, said second sample clock signal comprising a second start bit; converting, by a first analog-to-digital converter, said second analog signal to a second digital data signal; and transmitting, by said second modem, said second digital data signal to said first modem via said transmission medium.