DS0, or Digital Signal Zero, is a standard digital transmission rate for digital telecommunications.

What is DS0?

DS0 stands for Digital Signal Zero, and it is a standard digital transmission rate for digital telecommunications. DS0 defines a transmission rate of 64 Kbps and can carry either a single voice channel or data.

Telecommunication carriers transmit digital signals in multiples of DS0 called DS1, DS2, and so on. These multiples differ depending on whether you are dealing with the T-carrier system of North America or the E-carrier system of Europe and other continents.

DS0 trunk group

The following table lists the common DS-series transmission rates and their T-series or E-series equivalents (when defined). For example, you can see that a T1 data transmission is equivalent to 24 DS0 transmissions multiplexed together and can transmit data at a rate of 1.544 Mbps.

DS-Series Transmission Rates

DS TypeMultiple of DS0Data RateT-SeriesE-Series
DS0164 KbpsN/AN/A
DS1241.544 MbpsT1N/A
N/A322.048 MbpsN/AE1
DS1C483.152 MbpsN/AN/A
DS2966.312 MbpsT2N/A
N/A1288.448 MbpsN/AE2
N/A51234.368 MbpsN/AE3
DS367244.736 MbpsT3N/A
N/A2048139.264 MbpsN/AE4
DS44032274.176 MbpsN/AN/A
N/A8192565.148 MbpsN/AE5


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