PBX下的LAN的阻塞处理

A Method for the Prevention of Blocking in Lan on PBX

用户交换机（ＰＢＸ）作为局域网的连接手段，可减少投资，便于与其它网络连接。用阻塞性交换机建立的局域网引起的阻塞问题一直是局域网的重要课题之一。本文给出一种新的方法──令旗法解决这种阻塞问题，文中讨论了令旗法原理，状态转换结构，令旗产生公式，该方法动态地最大限度利用ＰＢＸ的内部时隙，结构简单，适应性强。

A LAN (Local Area Network)based on PBX (Private Branch Exchange) is easy to connect with other networks and its investment can be reduced. But the prevention of blocking in a LAN on PBX is one of the major topics concerned with LAN. A new flagmethod is proposed here to prevent the clogging. The principle of flag-method and transferring structure of states, the formulas of computing the number of flags are shown in this papers this method can dynamically and fully utilized PBX's switched network so the structure is quite simple and its adaptability is great.