English en.wikipedia.org... English English English English English English view article English push-to-talk 'push to talk PTT English push-to-talk English English English English English https://en.wikipedia.org/wiki/Push-to-talk English push to talk Push to Talk English English English English English English 'push to talk English https://en.wikipedia.org/wiki/Push-to-talk Nextel pioneered push-to-talk PTT English Push-to-talk Push-to-talk’ English 'push to talk Nextel push-to-talk phones https://en.wikipedia.org/wiki/Push-to-talk 'push to talk English push-to-talk Nextel push-to-talk phones https://en.wikipedia.org/wiki/Push-to-talk English Push to Talk http://en.wikipedia.org/wiki/Push-to-talk English English