Procedures for the identification and selection of common modes of operation between data circuit-terminating equipments (DCEs) and between data terminal equipments (DTEs) over the public switched telephone network and on leased point-to-point telephone-type circuits
公共交换电话网和租用点对点电话型电路上的数据电路终端设备(DCE)之间和数据终端设备(DTE)之间通用操作模式的识别和选择程序