구내 통신 선로에 유입되는 낙뢰나 유도에 의한 서지로부터 통신 설비 및 이용자를 보호하기 위하여 국선과 구내 케이블의 접속 지점에 외부로부터의 과전압 또는 과전류를 차단하기 위한 보호기를 설치하고 있다. 국내에서 이러한 보호기에 대한 설치 의무 및 성능 기준 등을 기술기준으로서 규정하고 있으나 현행 기술기준은 PSTN 서비스에 기반을 두어 수립된 기준으로 통신 기술의 발전에 따른 서비스의 다변화에 대응하고 있지 못하고 있다. 지난 연구에서 이러한 구내통신설비의 가입자 보호기 기술기준에 대한 개선 방향에 대한 제언을 한 바 있으며 이에 본 논문에서는 구내 통신용 보호기의 성능 기준 중 과전압 제한 성능 기준을 개정안을 마련하고 이의 검증을 위한 시험을 통해 개정안에 대한 타당성을 제시한다.
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