push-to-talk

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push-to-talk

A feature of walkie-talkies and certain cellphones and instant messaging services that provides instant voice connectivity to the party on the other end. Push-to-talk is a one-way (half-duplex) communication. When you want to talk, you press and hold down a button on the phone, or hold down the mouse button or space bar on the computer. Letting go of the button gives the other person an opportunity to push-to-talk. Nextel popularized the push-to-talk feature on its cellphone service.

press-to-transmit (switch) (PTT)

A switch on an aircraft's control wheel or stick enabling the pilot to make radio transmissions “hands on” via a headset microphone. Also called push-to-talk.
References in periodicals archive ?
A new enhancement is now available for Push to Talk Plus customers interoperability between Verizon 3G and 4G LTE devices.
Business Customers Can Combine Push to Talk for Powerful Workforce Management and Cost Savings
NII expects subscribers to grow 19% in 2004 along with a 28% rise in revenue, as the company expands push to talk service among users in and between Canada, the United States, Mexico, Peru, Brazil and Argentina by the end of 2004.
Verizon Wireless Push to Talk subscribers can connect directly with each other by pressing a button on their handset.
Sprint has assisted FEMA with the evacuation program since 2008; this year, FEMA chose to upgrade its fleet of push to talk devices to Sprint Direct Connect - the new gold standard in push to talk service.
For information on use cases for Push to Talk Plus in the enterprise and government space, visit the Verizon Enterprise Solutions news center.
March 31 /PRNewswire/ -- Verizon Wireless today announced that Push to Talk is available for the BlackBerry Tour(TM) 9630 smartphone, as of March 30.
In addition to Direct Connect[R] and group calling options, the devices are expected to enable Land Mobile Radio (LMR) interoperability, simultaneous data and push to talk, and availability notification.
March 29 /PRNewswire/ -- Verizon Wireless today announced that Push to Talk will be available for the BlackBerry Tour(TM) 9630 smartphone on March 30.
2Savings based on 450-minute options for Verizon Nationwide Select with Unlimited Push to Talk and AT&T Nation Talk & Text with Push to Talk Unlimited plans, based on published rate plans available on publication date.
Push to talk services implement push SIP session control, instead of using circuit switched end-to-end session control.