SIS SS-ISO 8802-4-1991 信息处理系统．局域网络．第4部分：令牌传递总线访问方法与物理层规范

标准号：SIS SS-ISO 8802-4-1991
中文标准名称：信息处理系统．局域网络．第4部分：令牌传递总线访问方法与物理层规范
英文标准名称：Information processing systems — Local area networks — Part 4: Token-passing bus access method and physical layer specifications
发布日期：1991/3/13 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：Scope. For the purpose of compatible interconnection of stations by way of a LAN using the token-passing bus access method this standard(1) Specifies the electrical and/or optical and physical characteristics of the transmission medium,(2) Specifies the electrical or optical signaling method used,(3) Specifies the frame formats transmitted,(4) Specifies the actions of a station upon receipt of a frame,(5) Specifies the services provided at the conceptual interface between the Medium Access Control (MAC) sublayer and the Logical Link Control (LLC) sublayer above it,(6) Specifies the actions, entities, and values used to manage the MAC sublayer and Physical Layer Entity (PLE).Within this standard the operation of a station is specified in terms of the layered model shown in Fig 1-1 and described in ISO 7498 : 1984 [13].2Additional information on the 802 family of LAN standards can be found in IEEE Std 802.1A [9].Figure 1-1 also shows which sections of the standard specify interfaces between layers and which sections specify the operation of the layers themselves.Recommendations for frequency allocations for community antenna television (CATV) systems are subjects for national standardization and are outside the scope of this International Standard.