The extra large capacity and Zone programming facilitate departmental, inter-agency interoperability, mutual aid and tactical channel organization. Inversion Scrambling and Encryption /ANI control permits first level to high level voice security and dispatch functions satisfying homeland security and confidentiality requirements. Emergency Call and Man-down for hazardous environment and corrections personnel is supported with FleetSync, MDC-1200/G-Star and DTMF ANI formats. The VGS-1 option offers a unique zone / channel voice guide for fire and rescue and a voicemail function for missed call recording. Full FleetSync® includes PTT ID, Caller ID and non-voice status and text messaging. FleetSync, DTMF or Two-Tone Selective Call provides built-in talkback paging capability.