E2S tolidkonandeh mosteghal ve pishro signaling dar jacpehan est. ma ba bish az 30 sal sabagheh, dar tarahi, toseeh ve tolid signalenpehei soti ve tasviri ba amolkard bala baraye makannpehei tajari, sanati, dariyayi ve khatrnak takhsos darim. daftar markazi ve amaliat tolidi ma dar landan, englestan vaghe shodeh est ve daraye emkanat gostardeh baraye tarahi, sakht, tazmin kifit, azmayesh ve arsal bah cpehmarah yek markz khodamat moshtari est keh bah bazarehaye jacpehani khodamat araeh midehad. alaveh bar in, yek markz tozi ve amaliat forosh akhtesasi dar teooston, tegzas mosteghar est keh amadtan bah moshtarian amrikaye shmali ve jenobi ve npamchenin prozhesnpehei jacpehani khodamat araeh midehad. yek shabkeh binolmollli az sharkaye tozi ve yekparchessazan sistam, dastersi bah mahsul dar sarasar jacpehan ve poshtibani fani mahli ra tazmin mikand.