Specifications include, but are not limited to: provide a dual-mode capable Project-25 Trunked Radio System ; This system shall include tower sites provided with equipment, shelters, generators, and additional site hardware including HVAC to support the Vendor’s proposed infrastructure. ; Front mount and rear mount, dual control-head with single rear mount radio and dual radios with single control-head configurations must be available to meet the needs of the different public safety users. Rear mount radios may require weatherproof control heads, speakers, microphones and other accessories (specific for fire operations). 6.1.5 Include emergency button on mobile radio control panels to initiate an emergency call. 6.1.6 Support special services options such as: encrypted voice and Automatic Vehicle Location (AVL) ; 8 Be capable of providing 9.6kb/s data-messaging transmission capabilities. 6.1.9 Offer digital voice encryption, using an Advanced Multi-Band Excited +2 (AMBE+2) or newer P25 Phase 1 and Phase 2 vocoder technology, and federally approved 256-bit AES coding to provide security during transmission and reception of sensitive communications.