Editing Digital Signal Designation

{{Refimprove|date=July 2008}}

'''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 [[telecommunication]]s.

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. <ref>{{Cite web |title=ds1 - CLC Definition |url=https://www.computerlanguage.com/results.php?definition=ds1 |access-date=2022-10-12 |website=www.computerlanguage.com}}</ref>

==Digital signal line rates==

===North America===
{| class="wikitable"
|-
! Digital Signal Designation
! Bandwidth/data rate
! Channels (DS0s)
! Carrier designation
|-
| DS0
| 64 kbit/s
| 1
|
|-
| [[Digital Signal 1|DS1]]
| 1.544 Mbit/s
| 24
| T1
|-
| DS1
| 3.152 Mbit/s
| 48
| T1c
|-
| DS2
| 6.312 Mbit/s
| 96
| T2
|-
| [[Digital Signal 3|DS3]]
| 44.736 Mbit/s
| 672
| T3
|-
| [[DS4/NA|DS4]]
| 274.176 Mbit/s
| 4032
| T4
|-
| DS5
| 400.352 Mbit/s
| 5760
| T5
|}
<ref>{{cite book
|url=https://books.google.com/books?id=ZCYBCAAAQBAJ&dq=ds5+megabit&pg=PA1207
|title=Fiber Optics Standard Dictionary
|isbn=9781461560234
|accessdate=6 August 2015|last1=Weik
|first1=Martin
|date=6 December 2012
|publisher=Springer
}}</ref><ref>{{Cite book |last=Al-Azzawi |first=Abdul |url=https://books.google.com/books?id=y__NBQAAQBAJ&dq=%22Digital+Signal+Designation%22+-wikipedia&pg=PA284 |title=Fiber Optics: Principles and Practices |date=2017-12-19 |publisher=CRC Press |isbn=978-0-8493-8296-3 |language=en}}</ref>

===Europe===
{| class="wikitable"
|-
! 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==
{{Reflist}}

[[Category:Multiplexing]]


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