IEC 62056-46:2002+AMD1:2006 Data link layer using HDLC protocol

На английском языке. 72 pages.
Specifies the data link layer for connection-oriented, HDLC-based, asynchronous communication profile. This consolidated version consists of the first edition (2002) and its amendment 1 (2006). Therefore, no need to order amendment in addition to this publication.