ETSI ETR 017-1992 终端设备(TE).包含CCITT V系列类型的接口的数据终端设备与用于中低数据信号传输速率的数据电路终接设备的连接要求
Terminal Equipment (TE); Requirements for the Attachment of Data Terminal Equipment Comprising CCITT V. Series Type Interfaces to Data Circuit- Terminating Equipment for Low and Medium Data Signalling Rates