Comprising ATLAS® 4500 multi-mode base station/repeaters and Viking® multi-/single-band mobile and portable radios, ATLAS P25 Phase 2 system provides Phase 1 FDMA 12.5 kHz and Phase 2 TDMA 6.25 kHz operation. Open-standards based, critical communications solution, targeting public safety agency use, provides fully software defined base station platform. Available system types include trunked, conventional, simulcast, and hybrid operation in VHF, UHF, and 7/800 MHz frequency bands.