AMPS cell group for cell channel allocation in in cellular communication systems (like mobile phones)
<div style="display:inline-block;padding:0 3px;background-color:#CCF">Original:</div> <div style="display:inline-block;padding:3px 0;"><a href="https://en.wikibooks.org/wiki/en:User:Jugandi" class="extiw" title="wikibooks:en:User:Jugandi">Jugandi</a></div> <div style="display:inline-block;padding:0 3px;background-color:#CCF">Vector: </div> <div style="display:inline-block;"><a href="//commons.wikimedia.org/wiki/User:Gesamtszenario" title="User:Gesamtszenario">gesamtszenario</a></div>
<b>Creation date specified as 1 January 2001 on Wikibooks, but this is most likely an error; Uploaded on: </b> 26 August 2008;  <b>Vector: </b> 2 October 2022
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Amps_cell_group.gif" title="File:Amps cell group.gif">Amps cell group.gif</a> <i>by</i> <a href="https://en.wikibooks.org/wiki/en:User:Jugandi" class="extiw" title="wikibooks:en:User:Jugandi">Jugandi</a>