3.2.5.2 Sending ECHO_RESPONSE_PDU

The structure and fields of the ECHO_RESPONSE_PDU message are specified in section 2.2.2. The echoResponse field of the ECHO_RESPONSE_PDU message MUST be populated with the data that was stored in the Echo Byte Stream store (section 3.2.1.1) during the processing of the ECHO_REQUEST_PDU message (section 3.2.5.1).