Patent ID: 8326147
Filing Date: 2012-12-04
Classification: H04J

Abstract:
1. A transmission apparatus comprising: a plurality of synchronous digital hierarchy (SDH) transmitting units configured to transmit and receive a predetermined SDH frame to and from each other; a switching unit configured to transfer the SDH frame transmitted from an SDH transmitting unit to another SDH transmitting unit; a WDM receiver configured to receive an optical signal from a wavelength division multiplexing (WDM) network; a receive-side optical supervisory channel (OSC) processing unit configured to process an OSC signal appended to the received optical signal; a WDM transmitter configured to transmit the optical signal to the WDM network; and a transmit-side OSC processing unit configured to set an OSC signal which is to be appended to an optical signal to be transmitted, wherein the receive-side OSC processing unit transmits the SDH frame containing wavelength information indicated by the OSC signal, to the switching unit, and wherein the transmit-side OSC processing unit receives the SDH frame containing wavelength information, from the switching unit and sets the OSC signal based on the wavelength information.