Patent ID: 6947069
Filing Date: 2005-09-20
Classification: H04N

Abstract:
1. A method for connecting a fiber optic line including one or more fiber optic cables and a fiber optic receiver to a transmission line carrying an information signal propagated from a transmitter via said fiber optic receiver toward a receiver in one direction and an external synchronizing signal from said receiver toward said transmitter in an opposite direction through a common connector connecting said fiber optic receiver with said transmission line and carrying bi-directional signals, the method comprising the steps of: transmitting a pulse signal having a voltage level higher than a maximum voltage level of said information signal or lower than a minimum voltage level of said information signal to said fiber optic receiver over said transmission line as an external synchronizing signal by using blanking portions of the information signals; separating said pulse signal transmitted over the transmission line from said information signal by comparing said transmitted pulse signal to a reference signal or voltage having predetermined level; and converting said separated pulse signal into optical signal for propagating said optical signal via said one or more fiber optic cables toward said transmitter.