ISDN 서비스 제공을 위한 인천지역의 가입자 선로특성의 측정 및 분석

초록

If high speed digital services (ISDN services) are applied to the analog networks, many problems appear. In this paper, we measured the performance of the conventional subcriber loops, analysis and the loop characteristics in Inchon area. We mesured the transmission loss, crosstalk noise, impulse noise. The transmission attenuation is larger attenuation than the threshold value (40dB at 80KHz) in the region of high frequency. The average value of the crosstalk noise has appeared to be 101.5 dB at 2KHz for 0.4mm lines. Impulse noise was measured for 15 minutes for 28 sample lines in Inchon. It noticed that there apear some problems to serve the ISDN in Inchon area since there exist 75 impulses per 15 minutes at -40dB level and 38 impulses per 15 minutes at -32 dBm level.