TeamSpeak is a VoIP software that allows you to easily conduct conference calls. It includes a wide range of features, including push-to-talk. If you'd like to enable the push-to-talk feature but don't know how this tutorial may help.
This document, titled « How To Enable the Push-to-Talk Feature in TeamSpeak », is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (ccm.net).