PoC - Open standards Initial Technology Press Release: Industry leaders Ericsson, Motorola, Nokia and Siemens mobile announced the completion of a jointly developed Push to talk over Cellular (PoC) specification based on the IP Multimedia Subsystem (IMS) as defined by 3GPP.
Converging Push-to-Talk At The Desktop PTT offers several benefits over traditional voice conferencing methodologies that make it particularly useful for time-sensitive, ad hoc voice calls that don.t require extensive discussions.