【通信应用笔记】线路卡保护过压和过流保护与CLP270M AN1220 APPLICATION NOTE LINECARD PROTECTION BY OVERVOLTAGE A.S.D AND OVERCURRENT WITH A CLP270M P.Merceron / A.Bremond INTRODUCTION This device includes a primary protection level and is suitable for main distribution frames and line cards. This protection concept is explained and, in addition, the CLP270M performances are analysed when facing different surges as described in the BELLCORE GR 1089 recommendations. Figure 1 is a simplified block diagram of a subscriber ……