In the communication system performing transmission with generating the vacant period in the slotted mode during data transmission in order to perform various process, such as different frequency carrier quality measurement or so forth, the control signal for maintaining a communication quality is inserted even in the vacant period. The method utilizes infrared spectra of cell samples which are dried on an infrared-transparent matrix and scanned at the frequency range from 3000-950 cm1. The eject member is configured to eject the card along an eject direction when the pressed portion is pressed by an operation member separated from the connector and having a tip. The cyclic process includes depositing a titanium layer and nitriding the deposited titanium layer. The second network storage processes the request and transmits a packet to the client as if the process had been executed in the first network storage.