Chief Transmission and Switching Engineer(JP

Let's do study and measures of "Telecommunication chief engineer examination" where a good teaching material doesn't exist though the examination contents is advanced little by little.

2010/08/24

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Welcome!

This blog translated the site in Japan with the Translation site. When it is strange English, I'm sorry. This is a blog that studies the Network/PBX/Transmission/Switching/Telephony!

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