A SONET Overview
Issue 3 June 2000
A-19
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 Equivalent SONET
Tributary Channels Rate 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 51.840Mb/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
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