BS 7219(1989) : 1989被替代
SPECIFICATION FOR X.25 PACKET LEVEL PROTOCOL FOR DATA TERMINAL EQUIPMENT FOR INFORMATION PROCESSING SYSTEMS
出版：British Standards Institution
专家解读视频
Describes the procedures, formats and optional user facilities at the Packet Level for Data Terminal Equipment (DTE) operating in conformance with CCITT Recommendation X.25. Both Virtual Call and Permanent Virtual Circuit modes of operation are covered. Covers DTE operation at the Packet Level when accessing a public or private packet switched network conforming to CCITT Recommendation X.25 by means of a dedicated path or a circuit switched connection. Covers the additional Packet Level procedures necessary for two DTEs conforming to this International Standard to communicate directly over a dedicated path or a circuit switched connection.
ISO/IEC 8208 : 2000(R2005) - Identical
