363-206-295
A SONET Overview
Issue 1
December 1997
A-19
Higher Rate Transport
1
Higher rate SONET signals are created by byte-interleaving
N STS-1 to form an
STS-
N signal. The STS-N is then scrambled and converted to an optical carrier -
level
N (OC-N) signal. The OC-N has a line rate of exactly N times the OC-1 signal
(see Table A-2).
Conclusion
1
The intent of this section is to present a short overview of SONET. More detailed
expositions can be found in various literature. An excellent description of SONET
can be found in Reference 3.
Table A-2.
SONET Transport Rates
OC Level
Line Rate (Mb/s)
Capacity
OC-1
51.84
28 DS1s or 1 DS3
OC-3
155.52
84 DS1s or 3 DS3s
OC-9
466.56
252 DS1s or 9 DS3s
OC-12
622.08
336 DS1s or 12 DS3s
OC-18
933.122
504 DS1s or 18 DS3s
OC-24
1244.16
672 DS1s or 24 DS3s
OC-36
1866.24
1008 DS1s or 36 DS3s
OC-48
2488.32
1344 DS1s or 48 DS3s
