TRANSMIT NETWORK FOR TRANSMITTING PLURAL INFORMATION STREAMS AND AN ALARM SYSTEM, ESPECIALLY RELATED TO INDEPENDENTLY SENDING AT LEAST TWO INFORMATION STREAMS WITHOUT MUTUAL INFLUENCE WHILE CONNECTING INDIVIDUAL SYSTEM COMPONENTS

摘要

PURPOSE: A transmit network for transmitting plural information streams and an alarm system are provided to re-divide entire available frequency bands of a transmission medium into at least two sub bands, thereby independently sending plural information streams through a common transmission medium without mutual influence. CONSTITUTION: Entire available frequency bands of a transmission medium are re-divided into at least two sub bands(FB1,FB2). The first sub band(FB1) has at least a 100kHz lower cut-off frequency. The second sub band(FB2) has an upper cut-off frequency selected not to be overlapped. A desired type of random information is transmitted in the first sub band(FB1), while digital technology-based information is transmitted in the second sub band(FB2). Safety-related or security-related information may be transmitted in the second sub band(FB2), while desired information of a safety or security system is transmitted in the first sub band(FB1).