High reliable and stable communication is required for telecom circuit. So circuit design is very critical. And telecom circuit is easy to suffer induced lightning surge, electromagnetic pulse and other conduction disturb since it is exposed in outdoor environmental. A reliable communication cannot be approached if there is no anti-disturbance protection design assistance. Anti-disturbance level is one of high quality item for telecom equipment.  Total protection solution is provided by Semicon Champion for telecom equipment.