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Before the Dawn of IP Telephony - Part 28
Transistor destroyed for unknown reason (summer ~ October 2002)
These contents translated a serialization article carried by ITPro IP telephony ONLINE published by Nikkei Business Publications, Inc. Jump to the original (Japanese).
(continued from previous page)
Commercialization after implementing triple fail-safe function
As the result of continuous and bitter verifications, we discovered that the destruction of the transistor was caused by multiple factors of the register being rewritten by external noise such as static electricity, and the rewritten register being slightly off from the threshold of peripheral devices.
If the register is rewritten, the process of destroying the transistor would never occur even when the trigger is inputted if the value of the peripheral device is correct. However, if there is input of a trigger when the value of the peripheral device is slightly off from the threshold, the state within the device and value of the peripheral device changed causing destruction.
Photo 2: Product displayed as "Broadband & Mobile IP Communication" at CEATEC JAPAN 2002, immediately after start of shipment
Once the cause was found, implementing a measure was easy. A triple fail-safe function was implemented to prevent destruction no matter the circumstance after guaranteeing the accuracy of product parts, and the product was released into the market (photo 2).
Through the measure of this problem, we were able to eradicate the hidden demerit of this device and were able to recognize again its advantages and disadvantages. And my feeling as a "fan" toward the device vendor that cooperated continuously to break through the wall of the problem had turned into a feeling of "trust." Advantages can be maximized and disadvantages can be compensated. And when there is a problem, it can be solved quickly with reasoning. It was if an effective technical concept was integrated with our own to become one.
"Only provide products that we can control"-as obvious as it may sound, it is the basic stance for a product to be safely used by end users and spread widely in the world. In essence, it is the mission of vendors providing products and indispensable for carrying out responsibilities.
... To be continued
