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Metering pulse
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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Automatic_message_accounting/Eojww8og">Automatic message accounting</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Metering pulse | Signalling | World Tone Database". <a href="https://www.3amsystems.com/World_Tone_Database/Signalling_guide?q=Metering_pulse" target="_blank">https://www.3amsystems.com/World_Tone_Database/Signalling_guide?q=Metering_pulse</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>J.G. Pearce, Telecommunications Switching, Plenum Press & Springer Science, N.Y. (1981), ISBN 9781489922175, p.96. <a href="/wiki/ISBN_(identifier)" target="_blank">/wiki/ISBN_(identifier)</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>