Both isomers are used by many insects in their chemical communication system. The CTPU also handles data sent to the UHF radio communication system. It is further supported with a state of the art communication system. Ease-of-use therefore is critical to the effectiveness of an emergency communication system. PA and Intercom systems are commonly used as part of an emergency communication system. The testing had been provoked after the failure of that communication system during STS-131. The communication system is available for free. People usually plot the BER curves to describe the performance of a digital communication system. This MMORPG featured a unique communication system. Translanguaging is the process whereby multilingual speakers use their languages as an integrated communication system. Data format conversion can also occur at the physical layer of an electronic communication system. The communicator allows direct contact between individuals or via a ship's communication system. Hence, there is also the need to modify the signaling and communication system. Biosurfactant synthesis is usually under the control of an intercellular communication system called quorum sensing. He added that "almost everybody" knew about the wireless communication system.