It was thus an example of a synchronous data transmission system. PJM uses a fifteen-year planning horizon for planning transmission system upgrades. In 1848, Boston began construction of a water transmission system. Elering is the member of the European Network of Transmission System Operators for Electricity. Fluid couplings are found in some Diesel locomotives as part of the power transmission system. Such system may provide benefit in integration with transmission system for the MPEG-2 Transport Stream. This limitation could potentially be overcome by the use of a distributed transmission system. In frequency signaling, the generating units match the frequency of the power transmission system. Subtransmission is part of an electric power transmission system that runs at relatively lower voltages. It had a new 8-speed transmission system. Making sure the frequency is constant is usually the task of a transmission system operator. The state has well spread transmission system. This makes the transmission system less susceptible to noise. The other version is the GSR which has a 5-speed manual transmission system. This allows the wind turbine to be directly connected to a transmission system.