This specification identifies requirements for Mission Critical Push-to-Talk (MC-PTT) services intended to operate over broadband networks, including, particularly, the National Public Safety Broadband Network (NPSBN) envisioned by ref (2). It comprises a portion of the requirements of the TIA-PN-4973 suite of standards (see ref.(1)). Specifically, it identifies requirements for Mission Critical (MC) Push-to-Talk (PTT) services over Broadband Networks in the context of TSB PN 4973.000.
