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本标准规范访问规则、同步化、寻址和网络单元与前端控制器之间的通信包结构。这个暂行的技术规范是一个Aloha方案,它允许快速报警发送和自行发现报警。 选用媒体访问控制(MAC)协议来提供及时通知报警、带宽效率、可测性、可靠性、低成本和发现不回应系统。主要影响设计的两个条件是: (1)99％概率,来自不同系统的500个同时报警将在20秒内通知。 (2)系统中10000多个管理工具探询间隔最多延迟5分钟。 媒体访问控制协议满足了上述两个要求。 本标准规范单元管理软件传给节点、放大器和电源的信息容量。信息集是仿照简单网络管理协议(SNMP)制订的。
This standard specifies access rules, synchronization, addressing, and communication packet structures between network elements and front-end controllers. This interim technical specification is a Aloha program that allows for quick alarm transmission and self-detection of alarms. Media Access Control (MAC) protocol is used to provide timely notification of alarms, bandwidth efficiency, scalability, reliability, low cost and discovery of nonresponsive systems. Two conditions that mainly affect the design are: (1) 99% probability that 500 simultaneous alarms from different systems will be notified within 20 seconds. (2) The inquiry interval of more than 10,000 management tools in the system is delayed by up to 5 minutes. The media access control protocol satisfies both of these requirements. This standard specification unit management software to nodes, amplifiers and power supply information capacity. The information set is modeled after Simple Network Management Protocol (SNMP).