What is Push To Talk feature in mobile phones ?
Push-to-talk calls are half duplex communications while one person speaks, the other(s) listen(s).
PTT service is supported only between parties on the same mobile carrier service, and users with different carriers will be unable to transmit to each other by PTT. However, the advancement of this service will likely bring interconnectivity of PTT traffic between different networks in the near future.
Advantage of this facility is:
1. A quick telephone conference with a group of people
2. Participants don't have to answer the phone, as the speaker's voice is automatically played through their p ...more
The Open Mobile Alliance is defining PoC as part of the IP Multimedia Subsystem, and a first version of OMA PoC standard was finalized in first half of 2005. There are few full-fledged commercial deployments of OMA PoC. It is very unclear whether OMA PoC will be seriously launched in the European market.
A pre-standard version of PoC is also defined by the industry consortium made up of Motorola, Nokia, Ericsson, Siemens AG and AT&T Mobility with the aim of creating a commercial offering enabling interoperability between vendors