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Digital Signal Designation
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<h2 id="digital-signal-line-rates">Digital signal line rates</h2> <h3>North America</h3> <table><tbody><tr><th>Digital Signal Designation</th><th>Bandwidth/data rate</th><th>Channels (DS0s)</th><th>Carrier designation</th></tr><tr><td>DS0</td><td>64 kbit/s</td><td>1</td><td></td></tr><tr><td><a href="/facts/Digital_Signal_1/cghJPRpQ">DS1</a></td><td>1.544 Mbit/s</td><td>24</td><td>T1</td></tr><tr><td>DS1</td><td>3.152 Mbit/s</td><td>48</td><td>T1c</td></tr><tr><td>DS2</td><td>6.312 Mbit/s</td><td>96</td><td>T2</td></tr><tr><td><a href="/facts/Digital_Signal_3/hfmvrz2m">DS3</a></td><td>44.736 Mbit/s</td><td>672</td><td>T3</td></tr><tr><td><a href="/facts/DS4%2fNA/I6M1MFCx">DS4</a></td><td>274.176 Mbit/s</td><td>4032</td><td>T4</td></tr><tr><td>DS5</td><td>400.352 Mbit/s</td><td>5760</td><td>T5</td></tr></tbody></table> <p><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a><a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h3>Europe</h3> <table><tbody><tr><th>Digital Signal Designation</th><th>Bandwidth/data rate</th><th>Channels (SL0s)</th><th>Carrier designation</th></tr><tr><td>Signal Level 0</td><td>64 kbit/s</td><td>1</td><td></td></tr><tr><td>SL1</td><td>2.048 Mbit/s</td><td>30</td><td>E1</td></tr><tr><td>SL2</td><td>8.448 Mbit/s</td><td>120</td><td>E2</td></tr><tr><td>SL3</td><td>34.368 Mbit/s</td><td>480</td><td>E3</td></tr><tr><td>SL4</td><td>139.264 Mbit/s</td><td>1920</td><td>E4</td></tr><tr><td>SL5</td><td>565.148 Mbit/s</td><td>7680</td><td>E5</td></tr></tbody></table> <h3>Optical carrier</h3> <p>See <a href="/facts/SONET/G3LgtGS6">SONET</a> for more information. </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"ds1 - CLC Definition". www.computerlanguage.com. Retrieved 2022-10-12. <a href="https://www.computerlanguage.com/results.php?definition=ds1" target="_blank">https://www.computerlanguage.com/results.php?definition=ds1</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Weik, Martin (6 December 2012). Fiber Optics Standard Dictionary. Springer. ISBN 9781461560234. Retrieved 6 August 2015. <a href="9781461560234" target="_blank">9781461560234</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Al-Azzawi, Abdul (2017-12-19). Fiber Optics: Principles and Practices. CRC Press. ISBN 978-0-8493-8296-3. <a href="978-0-8493-8296-3" target="_blank">978-0-8493-8296-3</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> </ol>