17.3.4.2* Digital Trunked System Requirements. Digital trunked systems shall comply with TIA-102.BAAA, Project 25 FDMA Common Air Interface, or TIA-102.BBAB, Project 25 Phase 2 Two-Slot Time Division Multiple Access Physical Layer Protocol Specification, and with TIA-102.BBAC, Project 25 Two-Slot TDMA Media Control Layer Specification, and shall meet the requirements in 17.3.4.1.