GR-253-CORE is recognized as one of the telecommunications industry's premier
sources of information on overall SONET generic criteria. Its proposed generic
requirements are advocated by most committees and subcommittees of the world's
leading standards organizations.

GR-253 features over 1200 proposed generic requirements for:

• Network Compatibility


• Rates and Formats


• Physical Layer


• Network Element Architectural Features


• SONET Network Element Operations


• SONET Operations Communications

• Several sections were updated to reflect recent changes to the ITU-T
  physical layer and OC-768 jitter specifications.


• The impedance/return loss criteria for STS-1 and STS-3 electrical interfaces
  were revised to align with the specifications in ITU-T Rec. G.703.


• Significant explanatory text was provided regarding the conditions under
  which the wander generation requirements apply, and on issues related to the
  phase variation criteria and measurements.


• Additions and revisions were made to address defects and failures that are
  relevant in virtual concatenation applications, and the possibility that some
  SONET NEs will receive "Generic AIS" generated by OTN equipment.

GR-253 replaced TR-NWT-000253 and GR-1377.

When using GR-253, you may want to refer to GR-63, GR-78,
GR-199, GR-357, GR-418, GR-468, GR-472, GR-474,
GR-496, GR-499, GR-1042, GR-1089, GR-1093, GR-1230,
GR-1244, GR-1250, GR-1253, GR-1400, GR-1469, GR-2854,
GR-2915, and GR-3000. You may also want to refer to GR-436,
GR-449, GR-454, GR-839, GR-1031, GR-1312, and
GR-1332.

Components of this product are:

GR-253-CORE

Table of Contents:

View Table of Contents

Select ROADMAP-TO-GRDOCS to download a free guide to the collection of GR Technical Documents