Patent ID: 9226050
Filing Date: 2015-12-29
Classification: H04J,H04Q

Abstract:
1. A transmission apparatus comprising: a network-side interface unit configured to receive a signal transmission frame into which a client signal is arranged from each of a working line and a protection line of a network, and extract the client signal from the received signal transmission frame; a client-side interface unit configured to transmit the extracted client signal to a client transmission path by using a clock generated by a phase synchronization circuit, based on frequency adjustment information of the client signal included in the signal transmission frame; a protection-line-side memory configured to store the frequency adjustment information of the client signal included in the signal transmission frame received from the protection line; and a switch controller configured to control the phase synchronization circuit so as to generate a clock by using the frequency adjustment information of the client signal stored in the protection-line-side memory when the signal transmission frame fails to be received from the working line.