https://wiki.phreaknet.org/index.php?action=history&feed=atom&title=Class_of_service_tone 2026-05-19T05:14:16Z Revision history for this page on the wiki MediaWiki 1.45.0 https://wiki.phreaknet.org/index.php?title=Class_of_service_tone&diff=759&oldid=prev 2022-08-17T22:47:55Z

<p>bold term</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:47, 17 August 2022</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The class of service tone is an audible tone played to a telephone operator indicating a special class of service for the calling party. It is commonly used to indicate the caller is using a pay station.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The <ins style="font-weight: bold; text-decoration: none;">'''</ins>class of service tone<ins style="font-weight: bold; text-decoration: none;">''' </ins>is an audible tone played to a telephone operator indicating a special class of service for the calling party. It is commonly used to indicate the caller is using a pay station.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>While class of service tones have since been superseded by electronic indications, such as those used on TSPS consoles, the class of service tone provided crucial information to operators in the days when cordboards remained common for dial &quot;0&quot; operator services. Class of service is needed to distinguish coin phones from other lines so that calls cannot be placed through the operator without a coin deposit. The class of service typically is a short burst of low tone or high tone and, when used, is audible to both the calling party and the operator.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>While class of service tones have since been superseded by electronic indications, such as those used on TSPS consoles, the class of service tone provided crucial information to operators in the days when cordboards remained common for dial &quot;0&quot; operator services. Class of service is needed to distinguish coin phones from other lines so that calls cannot be placed through the operator without a coin deposit. The class of service typically is a short burst of low tone or high tone and, when used, is audible to both the calling party and the operator.</div></td></tr> </table>

InterLinked https://wiki.phreaknet.org/index.php?title=Class_of_service_tone&diff=757&oldid=prev 2022-08-17T22:04:15Z

<p>added class of service tone information</p> <p><b>New page</b></p><div>The class of service tone is an audible tone played to a telephone operator indicating a special class of service for the calling party. It is commonly used to indicate the caller is using a pay station.<br /> <br /> While class of service tones have since been superseded by electronic indications, such as those used on TSPS consoles, the class of service tone provided crucial information to operators in the days when cordboards remained common for dial &quot;0&quot; operator services. Class of service is needed to distinguish coin phones from other lines so that calls cannot be placed through the operator without a coin deposit. The class of service typically is a short burst of low tone or high tone and, when used, is audible to both the calling party and the operator.<br /> <br /> The actual tone is generated by the dial &quot;0&quot; trunk circuit which puts the tone on the sleeve lead when the operator answers. Because the sleeve is a control lead not generally used for voice transmission, such noises are not usually audible. However, traditional coin phones have a capacitor between the sleeve and tip, and the capacitor makes the tone audible on the line&lt;ref&gt;{{cite web |url=http://www.evan-doorbell.com/production/WashNC.flac |title=Carolina Tel. part 1: Step with ESS tones in Washington NC, 7:25 |last=Doorbell |first=Evan}}&lt;/ref&gt;. This proved to be an efficient and economical means of providing class of service indications to the operator.<br /> <br /> == References ==<br /> &lt;references /&gt;</div>

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