Posted on 18-Aug-2004 21:44.
Filed under: News
Siemens is introducing the CX70, its first phone with "Push and Talk" (PaT) functionality. This is Siemens new name for the push-to-talk (PTT) functionality made popular by Nextel, and since then implemented on different networks, including some GPRS implementations.
The Push and Talk functionality works like an instant messenger. First, the user selects the people he or she wants to talk to from a list. At the push of a button, all of these previously defined addressees immediately receive an invitation which they can accept or decline. As soon as the participants have confirmed, the initial caller pushes the PaT button and starts the chat, which everyone hears simultaneously. The company says there is no call setup between parties, and thi solution relies on the GPRS network as the transport. Any group member can reply immediately by pressing the PaT button. The communication can only go in one direction at a time, however: whoever presses the PaT button first, talks first.
The mobile voice chat supplements SMS and eliminates the setup of conference calls. This kind of service is being used mainly in the United States, where it replaces the traditional radio communications because of its longer range, easy to use and availability.
In addition to the optional PaT function (depends on the operator), the CX70 has a 3-D Java engine and a high-resolution display capable of showing 65,536 colors.
The OMA (Open Mobile Alliance) is currently working to define a standard for this kind of communication. Current members include Siemens, Lucent, Nokia, Ericsson and other companies involved in the mobile development.