A communication system in MPLS-TP network, the communication system comprising: a transmission apparatus (231, 232) configured to, when a failure is detected, transmit an AIS frame; and a receiving apparatus configured to receive the AIS frame, wherein the transmission apparatus comprises: transmission frame processing means holding first section information about a section and paths over each of which AIS frame is to be output when a failure occurs in the section and configured to, when a failure occurs, insert information about the paths into the AIS frame based on a location of the failure and the first section information, and determine a port from which the notification frame is to be output; and frame transmission means configured to receive the AIS frame and information about the port from the transmission frame processing means and to transmit the AIS frame from the port, the receiving apparatus comprises: frame transmission and reception means configured to receive the AIS frame and to transfer the AIS frame; and received frame processing means configured to, when the AIS frame is received, inhibit alarm related to the failure of the paths inserted into the AIS frame or control transfer of the AIS frame according to whether the receiving apparatus is a terminating apparatus. a transmission apparatus (231, 232) configured to, when a failure is detected, transmit an AIS frame; and a receiving apparatus configured to receive the AIS frame, wherein the transmission apparatus comprises: transmission frame processing means holding first section information about a section and paths over each of which AIS frame is to be output when a failure occurs in the section and configured to, when a failure occurs, insert information about the paths into the AIS frame based on a location of the failure and the first section information, and determine a port from which the notification frame is to be output; and frame transmission means configured to receive the AIS frame and information about the port from the transmission frame processing means and to transmit the AIS frame from the port, transmission frame processing means holding first section information about a section and paths over each of which AIS frame is to be output when a failure occurs in the section and configured to, when a failure occurs, insert information about the paths into the AIS frame based on a location of the failure and the first section information, and determine a port from which the notification frame is to be output; and frame transmission means configured to receive the AIS frame and information about the port from the transmission frame processing means and to transmit the AIS frame from the port, the receiving apparatus comprises: frame transmission and reception means configured to receive the AIS frame and to transfer the AIS frame; and received frame processing means configured to, when the AIS frame is received, inhibit alarm related to the failure of the paths inserted into the AIS frame or control transfer of the AIS frame according to whether the receiving apparatus is a terminating apparatus. frame transmission and reception means configured to receive the AIS frame and to transfer the AIS frame; and received frame processing means configured to, when the AIS frame is received, inhibit alarm related to the failure of the paths inserted into the AIS frame or control transfer of the AIS frame according to whether the receiving apparatus is a terminating apparatus.