Attachment requirements for Data Terminal Equipment (DTE) to connect to Packet Switched Public Data Networks (PSPDN) using CCITT recommendation X.25 (1984) interface; requirements applicable to DTEs subscribing to Link Access Procedure Balanced (LAPB) extended (modulo 128) operation; english version ETS 300123:1991
使用CCITT建议X.25(1984)接口连接到分组交换公共数据网络(PSPDN)的数据终端设备(DTE)的附件要求;适用于订阅链路接入程序平衡(LAPB)扩展(模128)操作的DTE的要求;英文版