The IESG has approved the Internet-Draft 'Definitions of Managed Objects for the SONET/SDH Interface Type' <draft-ietf-atommib-rfc2558bis-01.txt> as a Draft Standard. This document is the product of the AToM MIB Working Group. The IESG contact persons are Erik Nordmark and Thomas Narten. The implementation report can be viewed at http://www.ietf.org/IESG/Implementations/RFC2558-Implementation.txt Technical Summary This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in TCP/IP- based internets. In particular, it defines objects for managing Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) interfaces. This document is a companion to the documents that define Managed Objects for the DS1/E1/DS2/E2 and DS3/E3 Interface Types. Working Group Summary There was WG consensus to advance the document. Protocol Quality The document has been reviewed for the IESG by Erik Nordmark and Bert Wijnen.