ITU-T V.23

<h2 id="related-technology">Related technology</h2>
<p>The <a href="/facts/Bell_202_modem/JvdlzLTd">BELL 202</a> communications standard defines a similar modulation scheme.
</p>
<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Caller_ID/hh9DqEEj">Caller ID</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="http://www.itu.int/rec/T-REC-V.23-198811-I/en">the ITU V.23 normalization</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"Appendix G: Antique Modems", Modem-HOWTO (v0.39 ed.), January 2007 <a href="https://tldp.org/HOWTO/Modem-HOWTO-29.html" target="_blank">https://tldp.org/HOWTO/Modem-HOWTO-29.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>ITU-T Recommendation V.23: 600/1200-Baud Modem Standardized for Use in the General Switched Telephone Network, ITU, 1993, p. 1 <a href="https://www.itu.int/rec/T-REC-V.23-198811-I/en" target="_blank">https://www.itu.int/rec/T-REC-V.23-198811-I/en</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"Sync Async Lease line V23 Modem". <a href="https://www.arcelect.com/DCB_V23_Modem.htm" target="_blank">https://www.arcelect.com/DCB_V23_Modem.htm</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
</ol>

ITU-T V.23 open-in-new

ITU-T V.23