A base station subsystem, a TMA part and a RBS part of a communication system employing TDD; and respective methods are provided for synchronizing the RBS part of the base station subsystem with the TMA part The RBS part comprises an RBS modem adapted to generate a switch signal comprising a switch command word, and to further send the switch signal to a TMA modem. The module has a female end-piece at one extremity and a corresponding male end-piece at the other. By increasing an resistance added to common SRAM power line, the pull-down current through flash Strings to grounding source line can be made much larger than the pull-up current to improve SFwrite program operation. The server holds operated side information about a request, from a device user of the operated device, to have the task performed. A plurality of known input voltages may be utilized to generate a corresponding plurality of output voltages of the level detector, generating a corrected transfer function that may be used to accurately set a transmitter power level. The splitter outputs an analog optical pulse train derived from the amplified multiple optical pulses.