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Question:

An id card can authorize two sets of residential access control system authority?

An id card can authorize two sets of residential access control system authority?

Answer:

Access card classification varied, according to the choice of materials can be divided into several categories according to the shape according to the shape is divided into standard card and shaped card. Standard card for the international uniform size of the card, its size is 85.5mm × 54mm × 0.76mm. And now because of the needs of individual prints from the size of the restrictions, resulting in the world there are many different "weird" card, this card we call the shaped card. According to the type of card 1. Magnetic card (ID card): the advantage is lower cost; one card, security in general, can be connected to the computer, open the door record. Disadvantages are cards, equipment wear, shorter life; card easy to copy; easy to two-way control. Card information is easily lost due to external magnetic field, so that the card is invalid.
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. RF card (IC card): the advantages of the card and the device without contact, open the door for security; long life, theoretical data at least ten years; high security, can be connected to the computer, open the door record; can achieve two-way control; copy. The disadvantage is that the cost is higher. Press the reader distance 1. contact access card, access card must be in contact with the access control card reader to complete the task. 2. Inductive access card, access card in the access control system within the sensor range can be completed card tasks

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