Browse Definitions:
Definition

Push to Talk (PTT)

Push to talk (PTT), is a means of instantaneous communication commonly employed in wireless cellular phone services that uses a button to switch a device from voice transmission mode to voice reception mode. The operation of phones used in this way is similar to "walkie talkie" use. PTT switches a phone from full duplex mode, where both parties can hear each other simultaneously, to half duplex mode, where only one party can speak at one time. Multiple parties to the conversation may also be included.

All major wireless carriers are rolling out versions of the service, which has been in wide use by Nextel (using the Integrated Digital Enhanced Network, or iDEN ) in the telecommunications and construction industries for years. These new versions of PTT, sometimes described as "Push To Talk over Cellular" (PoC), are based on 2.5G or 3G packet-switched networks using a form of VoIP based upon SIP and RTP protocols instead of iDEN. While current standards only allow users to talk to others within proprietary cell phone networks, future cooperation between companies and agreement on standards may allow interoperability between handsets on differing carriers.

Traditionally, a major attraction to consumers and businesses using PTT is the ability to communicate on-demand without using allotted minutes within a calling plan. This incentive may diminish as carriers adjust pricing structures to include PTT in data plans or in regular minute counts.

Early mobile telephony also used a form of PTT in the 1980s. Similar to operator-assisted landline telephone services of the early 20th century, mobile telephone users would press and hold a PTT button for several seconds to alert an operator. When the user released the button, an operator would then ask for the number the user wished to dial. The user would then transmit back and tell the operator the desired number, after which the operator would subsequently connect the wireless phone to the number desired.

This was last updated in January 2011

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

Extensiones de Documento y Formatos de Documento

Accionado por:

SearchCompliance

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

  • audit program (audit plan)

    An audit program, also called an audit plan, is an action plan that documents what procedures an auditor will follow to validate ...

SearchSecurity

  • computer worm

    A computer worm is a type of malicious software program whose primary function is to infect other computers while remaining ...

  • black hat

    Black hat refers to a hacker who breaks into a computer system or network with malicious intent.

  • copyright

    Copyright is a legal term describing ownership of control of the rights to the use and distribution of certain works of creative ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

  • mass notification system (MNS)

    A mass notification system is a platform that sends one-way messages to inform employees and the public of an emergency.

SearchStorage

  • non-volatile memory (NVM)

    Non-volatile memory (NVMe) is a semiconductor technology that does not require a continuous power supply to retain the data or ...

  • hybrid hard drive (HHD)

    A hybrid hard drive (HHD), sometimes known as a solid-state hybrid drive (SSHD), is a mass storage device that combines a ...

  • USB flash drive

    A USB flash drive -- also known as a stick, thumb or pen drive -- is a plug-and-play portable storage device that uses flash ...

SearchSolidStateStorage

  • RRAM or ReRAM (resistive RAM)

    RRAM or ReRAM (resistive random access memory) is a form of nonvolatile storage that operates by changing the resistance of a ...

  • JEDEC

    JEDEC is a global industry group that develops open standards for microelectronics.

  • M.2 SSD

    An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification written for internally mounted storage...

SearchCloudStorage

  • Google Cloud Storage

    Google Cloud Storage is an enterprise public cloud storage platform that can house large unstructured data sets.

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

Close