The document outlines various digital communication standards including their nominal bit rates, actual line rates, equivalent voice channels supported, and corresponding PDH, SONET, and SDH terminology. It provides a mapping between common digital communication standards like T1, E1, E3, OC-1, and others in both North America and Europe/Japan.

1. Nominal Bit
Rate
Actual Line
Rate (Mbps)
Number of
Equivalent
Voice
Channels
PDH SONET
Virtual
Tributary
SDH Virtual
Container
SONET
Carrier
SDH
Carrier
SDH
Administrative
Unit
SDH Tributary
Unit
NA
Europe /
Japan
64 kbps 0.064 1 T0 / DS-0 E0 / J0
1.5 Mbps 1.544 24 T1 / DS-1 J1 VT1.5 VC-11 TU-11
2 Mbps 2.048 30 DS-1A E1 VT2 VC-12 TU-12
3 Mbps 3.152 48 T1C / DS-1C VT3
6 Mbps 6.312 96 T-2 / DS-2 J2 VT6 VC-2 TU-2 or TU-21
8 Mbps 8.448 120 E2
34 Mbps 34.368 480 E3 / J3 VC-3 TU-3
45 Mbps 44.736 672 T3 / DS-3 STS-1 SPE VC-3 AU-3 or AU-32
51 Mbps 51.84 672 STS-1 OC-1 STM-0
91 Mbps 91.053 1344 DS-3C
140 Mbps 139.264 1920 E4 STS-3C VC-4 OC-3 STM-1 AU-4
155 Mbps 155.52 2016 STS-3 OC-3 STM-1
274 Mbps 274.176 4032 DS-4
397 Mbps 397.2 5760 J4
622 Mbps 8064 STS-12C OC-12 STM-4
622 Mbps 622.08 8064 STS-12 OC-12 STM-4
2.5 Gbps 32256 STS-48C OC-48 STM-16
2.5 Gbps 2488.32 32256 STS-48 OC-48 STM-16
10 Gbps 129024 STS-192C OC-192 STM-64
10 Gbps 9953.28 129024 STS-192 OC-192 STM-64
40 Gbps 516096 STS-768C OC-768 STM-256
40 Gbps 39813.12 516096 STS-768 OC-768 STM-256