Abstract : based on the introduction of the present situation for local psdn the paper discusses the benefits and technical pian of opening pos service over psdn 文摘:在介绍本地分组交换数据网现状的基础上，对在该网上开放pos业务的好处及有关技术方案进行了讨论。
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Telecontrol equipment and systems - part 6 - 601 : telecontrol protocols compatible with iso standards and itu - t recommendations - functional profile for providing the connection - oriented transport service in an end system connected via permanent access to a packet switched data network 远动设备和系统第6 - 601部分：与iso标准和itu - t建议兼容的远动协议在通过永久接入分组交换数据网连接的端系统中提供基于连接传输服务的功能协议集
