What Does Push to Talk Over Cellular (PoC) Mean?

Push to talk over cellular (PoC) is a wireless two-way cellular communication allowing instant and global mobile connectivity with the ability to communicate on a push of a key.

Techopedia Explains Push to Talk Over Cellular (PoC)

PoC combines push-to-talk (PTT) operational advantages with interference immunity and other mobile phone advantages. For example, PoC uses half-duplex communication (only one call may be transmitted by a user) and one call may be received by one or more users. This feature is more useful when single user wants to talk to a group without making multiple calls.

Full-duplex communication was traditionally applied to mobile networks and devices, which required connection using a dialed phone number or an answered call. This connection was active until the call ended or the connection failed from a signal loss.