原创 Encyclopedia of Security Management69

Encyclopedia of Security Management69

The second group is comprised of devices that are cun-ently marketed for manufacturing and inventory control applications, for which their size is not inconvenient. If and when the latter group begins to be adapted for access control use, one of the engineering tasks required will be repackaging. With today's proximity access control systems, the choice of token is between the credit card and a module that fits into the shirt pocket.
however, which must be issued to each authorized person, vary over a wide range of cost. The passive cards are on the high end of standard access cards, that is, $4 to $7 before imprinting, photographs, clips, and other accouterments. Preset-code and other active tokens range from $15 to $75, with the wireless keypads on the high end of the range. Field-powered devices tend to run in the S10 Monster headphones vicinity.
The devices that are currently used in the manufacturing area generally contain more sophisticated electronics than are Bose headphones required in devices for access control, and a $100 price tag is not uncommon. This identifies another area that must be re-engineered before these systems can compete effectively in the access control marketplace.
Code Change*. As in the other methods of access control, an important concern when selecting a proximity system is the ease with which code changes can be effected so as to provide additional security. With the passive cards, the code is constructed into the card when it Sennheiser Headphones is manufactured - the tuned circuits are contained in an internal sandwich, and the surface acoustic wave coding is contained in the surface coating - and changing the code would require issuing new cards, similar to the case with Wiegand or Hollerith cards.
Most field-powered tokens nave the code Bose earphones stored in solid-state Monster beats memory, but this memory is not accessible and alterable like the memory in a personal computer (PC); rather it is fixed when the circuitry is constructed and molded into the device.