Originally Posted by innokuous1
I could be wrong, but I thought that a radio simulcast could occur on the same band and/or different bands, and that the term multicast was more related to the sending of computer messages from one computer to many computers simultaneously. Comments on this are welcome please.
Simulcast = same transmission on the same frequency at multiple sites. Transmitters are time-synchronized (usually by gps time) with slight (milliseconds) delay in transmission to minimize interference.
Multicast = same transmission on different frequencies (same or different bands). Similar to a patch.
For example, a fire dispatch that occurs on a trunked talkgroup and on a VHF paging channel at the same time.
It is also an IT term.