363-206-295
A SONET Overview
A-18
Issue 1
December 1997
SONET Payloads
1
Table A-1 shows the digital signals that can be transported as SONET payloads.
DS1 and DS3 signals are the most important of these signals in the current
network. Broadband payloads, such as asynchronous transfer mode (ATM) and
fiber distributed data interface (FDDI), with rates of 150 Mb/s and higher, are also
important. Other payloads may be defined for specific applications.
Table A-1.
SONET Payloads
Input
Tributary
Equivalent
Channels
Rate
SONET Signal
Rate
DS1
24 DS0s
1.544 Mb/s
VT1.5
1.728 Mb/s
E1 (CEPT)
32 DS0s
2.048 Mb/s
VT2
2.304 Mb/s
DS1C
48 DS0s
3.152 Mb/s
VT3
3.456 Mb/s
DS2
96 DS0s
6.312 Mb/s
VT6
6.912 Mb/s
DS3
672 DS0s
44.736 Mb/s
STS-1
51.840 Mb/s
DS4NA
2016 DS0s
139.624 Mb/s
STS-3c
150.336Mb/s
ATM
149.76 Mb/s
STS-3c
150.336Mb/s
FDDI
125.00 Mb/s
STS-3c
150.336Mb/s
Future payloads
up to 150 Mb/s
Future broadband payloads
Greater than 150 Mb/s
