一、引言: 一个长距离海底电缆系统包括海底电缆、增音机·均衡器·终端机及供电装置等多种设备,这些设备的好坏又受到电子元件、塑料等原材料的影响。所以设计一个性能优良·经济合理的长距离海底电缆系统是一件比较庞杂的工作。需要增音机、终端机和电缆等生产卩门和使用卩门的设计人员的协力配合才能达到。就海底电缆 I. INTRODUCTION: A long-distance submarine cable system includes a variety of equipment such as submarine cables, amplifiers, equalizers, terminals and power supply units. The quality of these devices is affected by the raw materials such as electronic components and plastics. Therefore, designing a long-distance submarine cable system with excellent performance and economy is a rather complicated task. Need to add sound machines, terminals and cables and other production Jie Jie and designers using the door to work together to achieve. On the sea cable