Technisonic TDFM-600/6000 series multiband transceivers are Project 25 compliant; they function in conventional and trunked modes; they support digital and analog operation; and they support the functions and features of most Industry Standard Public Safety communications systems. The TDFM-600 supports two transceiver modules which can be configured with any combination of the following: VHF (136 to 174 MHz), UHF Low Band ( 403 to 470 MHz), UHF High Band (450 to 512 MHz) and the 800 MHz Band. The TDFM-6000 supports operation on any three of the above transceiver modules. It is possible to utilize two modules operating in the same band in either the TDFM-600 or TDFM-6000 series radios. The TDFM-600/6000 radio supports independent and simultaneous operation on all installed transceiver modules. Each of the modules can be fitted with optional features such as SmartNet/SMARTZONE trunking, DES-OFB, DES, or DVI encryption formats and Multi-Key.