7845GSMR Ademco Honeywell&rsquo;s Digital Cellular Communicator Full Contact ID or ADEMCO High-Speed Reporting Contact ID reporting using ECP mode with compatible Honeywell control panels or combined with optional dialer capture for non-ECP capable control panels. 256-bit AES Encryption Advanced encryption standard used for secure communications. Dual-Path Technology Uses GPRS (General Packet Radio Service) as primary digital cellular path and automatically switches to SMS (Short Message Service) if GPRS is unavailable. Integration Quick and easy installation of GSM for VISTA and LYNX controls. Diagnostic LEDs Provide signal strength and status indications.