Appendix; Sonet/Sdh Conversion Chart - Cisco 12000 User Manual

SONET/SDH Conversion Chart

The term Synchronous Optical NETwork (SONET) is used instead of Synchronous Digital Hierarchy
(SDH) throughout this Guide. However, these two terms are somewhat interchangeable. The
Cisco 12000/10720 Router Manager application handles both SDH and SONET in the same manner. The
Cisco 12000 Series Routers support both SDH and SONET.
SONET was defined by the American National Standards Institution (ANSI) and is used in North
America.
SDH was defined by the European Telecommunications Standards Institute (ETSI) and is now used
everywhere outside of North America and Japan. SDH was standardized by the International
Telecommunications Union (ITU).
Table A-1
Table A-1
SONET
OC-3
OC-12
OC-48
OC-192
OL-4455-01
compares SONET and SDH speeds.
SONET and SDH Speeds
A P P E N D I X
SDH
STM-1
STM-4
STM-16
STM-64
Cisco 12000/10700 v3.1.1 Router Manager User Guide
A
A-1