Digital Signal Designation

Digital Signal Designation is the classification of digital bit rates in the digital multiplex hierarchy used in transport of signals from one location to another in telecommunications.

The DS technically refers to the rate and format of the signal, while the T designation refers to the equipment providing the signals. In practice, "DS" and "T" are used synonymously; for example, DS1 and T1, DS3 and T3. [1]

Digital signal line rates

North America

Digital Signal Designation Bandwidth/data rate Channels (DS0s) Carrier designation
DS0 64 kbit/s 1
DS1 1.544 Mbit/s 24 T1
DS1 3.152 Mbit/s 48 T1c
DS2 6.312 Mbit/s 96 T2
DS3 44.736 Mbit/s 672 T3
DS4 274.176 Mbit/s 4032 T4
DS5 400.352 Mbit/s 5760 T5

[2][3]

Europe

Digital Signal Designation Bandwidth/data rate Channels (SL0s) Carrier designation
Signal Level 0 64 kbit/s 1
SL1 2.048 Mbit/s 30 E1
SL2 8.448 Mbit/s 120 E2
SL3 34.368 Mbit/s 480 E3
SL4 139.264 Mbit/s 1920 E4
SL5 565.148 Mbit/s 7680 E5

Optical carrier

See SONET for more information.

References

  1. ^ "ds1 - CLC Definition". www.computerlanguage.com. Retrieved 2022-10-12.
  2. ^ Weik, Martin (6 December 2012). Fiber Optics Standard Dictionary. Springer. ISBN 9781461560234. Retrieved 6 August 2015.
  3. ^ Al-Azzawi, Abdul (2017-12-19). Fiber Optics: Principles and Practices. CRC Press. ISBN 978-0-8493-8296-3.


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