2008年12月21日星期日

How to Purchase an Access Control

The basic system consists of access card readers, controllers, cards, electronic control locks and other accessories components. On the stability of the entire system, are essential to any part of, any of the components of the instability will affect the stability of the entire system. However, on security, and the card reader should be the most important cards like an "electronic key", if the key was easy to copy someone else, the entire access control system there is no security to speak of the.

Card identification technology is probably gone through several stages:

Magnetic cards - contactless smart card - card - contactless smart cards. Contactless smart card and proximity card though and are based on the RFID, has a contact-free, easy-to-use features. But among them there are still many differences. From a technical development, the contactless smart card to replace the card is taken for granted. The market situation is also evidenced in China, the contactless smart card has 2 consecutive years of growth in the median, contactless smart card technology is bound to the next generation of mainstream technology, this is an indisputable fact. Domestic and foreign companies have been offering their own contactless smart card reader and (13.56MHz), in the face of so many brands on the market and the card reader, how to choose a safe, reliable products? How do users spend a minimum price from the sensor card technology to upgrade to contactless smart card technology? This is also a concern for many users.

Product Selection

Choice of profession and access control card reader

Speaking of professional, business or project may have a lot of users find it difficult to have a scale, personal feel that the following factors should be taken into account. Follow the ISO standard: 13.56MHz contactless smart card, usually 4 ISO standard: ISO14443A, ISO14443B, ISO15693, ISO18000.

ISO standards are each composed of four parts, such as: physical size, frequency, power and signal interface, initialization and anti-collision and Transport Protocol, and so on. And the card reader to follow the ISO standards in the performance of the user is directly in front of the card reader and the reader distance, speed communications, and so on, such as: ISO15693 in line with the products than the products in line with ISO14443 further reading From the card, but the communication speed slower than the ISO14443. As with the access cards and card readers, among them the volume of data transmission is very small, any ISO standard rate sufficient to meet the communications requirements, but if there are more distant from the reader to be the most convenient Therefore, in line with the ISO15693 standard option cards and card readers for access control system users will be more convenient. However, if the user to carry out, such as fingerprint, iris and palm-shaped, and other biometric authentication, and the biometric templates stored on the card, it is necessary to choose products that meet the ISO14443 standard, because biometric template there is a larger amount of data. Some products may be more than the same time, in line with ISO standards, such as: HID's iCLASS products. HIDiCLASS cards in general iCLASS card reader on the ISO15693 standard used to be distant from the reader; but with a card, close to the iCLASS fingerprint reader will automatically ISO14443B standards for high speed communications.

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