When ordering the DIU Crypto Module, you must order the Crypto Module main line item (T6721), one DIU Basic Software Option (CA00147AA), and at least one (but no more than two) algorithm options. Encryption Algorithms can co-exist on the DIU Crypto Module in the following combinations only: DES OFB and DVP XL; DES XL and DVP XL; DVI XL and DVP XL; AES and any existing algorithm supported by DIU CM All ASTRO® DIU Crypto Modules are full duplex. Operation of the DIU Crypto Module requires an upgrade to the DIU Host to software Release 6.09 or later (1Q02 or later) NOTE: See the ASTRO DIU FLASHport Upgrades page for specific DIU Host upgrade ordering requirements. It is recommended to upgrade the DIU Radio Service Software (RSS) to the most current shipping version when ordering the DIU CM for the first time. Any non-VSELP system currently operating with DIU EMCs may add DIU Crypto Modules to their system to allow for secure channel add-ons per each system's life cycle plan. These configurations will require an upgrade to the existing DIU EMCs to software Release 7.3 or later (1Q02 or later) and upgrade to the DIU Host to software Release 6.09 or later (1Q02 or later). See the ASTRO DIU FLASHport Upgrades page for specific DIU Host upgrade ordering requirements. See below for DIU EMC upgrade ordering kits. The following items may be purchased through Customer Care Services Division (CCSD, formerly called AAD) at 1-800-422-4210: 3V Coin Battery (CNN6002A) DIU CM Instruction Manual (6880801G85) DIU CM FLASHport® upgrade manual (6881131E85) AES was certified for voice only operation on Conventional 3.1 and ASTRO SmartZone Release 4.1 in 2Q02 SER and was certified on SMARTNET® 3.0 and SMARTNET 3.2 in the 3Q02 SER. Adding the AES Encryption algorithm to one of these system configurations will require upgrades to the following: DIU Host to software Release 6.15 or later (2Q02 or later). See the ASTRO DIU Upgrades Page for specific DIU Host upgrade ordering requirements. Existing DIU CM will require an upgrade to software Release 8.1 (RSS will display 81) or later (2Q02 or later). See the ASTRO DIU CM FLASHport UCM Upgrades Page for specific DIU CM upgrade ordering requirements.