Critical ops hack october 24 2016
What this difference means for IP systems is that, in the event of network failure, the readers can continue to operate and grant or deny access as per usual. In RS485 systems, the intelligence is centrally located in the access control panels. In IP systems, the intelligence is at ‘the edge’, meaning the systems intelligence, copy of database and ability to make access granted or denied decisions is located in the readers at the door. For both network failure and power failure, doors will be either fail safe or fail secure, resulting in doors being either insecure or inoperable. The security vulnerabilities encountered by a network failure on IP access control systems is no different to the vulnerabilities encountered by a power failure on RS485 systems. Since organisations these days are so reliant on their networks, a significant amount of redundancy is usually factored in. Myth: IP access control is more prone to failure: Networks have become such a critical asset to organisations that any downtime has significant ramifications financially, operationally and from a security perspective. A single point of failure in this case will result in just the one door being inoperable. IP systems negate this risk since each door is independently connected straight into the network.
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In RS485 systems with access control panels and multi-door controllers, a single point of network failure can render multiple doors inoperable. Depending on what topology is used, IP access control systems can in fact be more reliable than the traditional RS485 systems that they are replacing. IP access control can also draw on the vast experience and knowledge of the IT industry. Myth: IP access control is relatively untested compared to traditional access control: While IP might be newer in terms of its rival, RS485 copper, with regard to electronic access control systems, the IP technology itself is a mature, well-tested and proven technology. Another disadvantage of an IP system is that cable runs between switch and reader are normally limited to 100m. This means that RS485 copper cables and dedicated low-voltage power cables still need to be provided to these devices.
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There are, however, some disadvantages of IP over RS485 access control systems the main one being that, even though the readers are IP, the locks and reed switches are often not. RS485 systems on the other hand require separate transmission and power cables. IP systems require less cabling, as IP electronic access control utilises Cat 6 cables which provide transmission and can utilise PoE. An IP system allows remote diagnostics, as each door is networked. In IP systems there is no longer a need for power supply units (PSUs), as IP utilises PoE. As mentioned, there is no need for control panels as the intelligence is direct to the door.
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IP access control systems provide a number of benefits over the traditional RS485 access control systems. In IP systems, however, Cat 6 cables are run from PoE switches installed in the security/IT room or communications riser (in lieu of control panels and door controllers) directly to the readers at the door. The control panels and door controllers are usually installed in a dedicated security/IT (information technology) room or communications riser. In RS485 systems, copper cables are run between access control panels and door controllers and from door controllers to the readers, locks and other devices at the door. Myth: there is no real difference between IP and traditional RS485 access control systems: IP electronic access control, as opposed to the traditional RS485 systems, uses Cat 6 cables and utilises PoE (power over ethernet) instead of copper RS485 transmission cables and a dedicated low-voltage power cable. Below, some of these myths are examined and the advantages and disadvantages of IP access control over traditional RS485 systems are explored. As with the initial introduction of IP CCTV, a number of myths regarding the capabilities of IP access control are regularly being encountered within the industry. The IP electronic access control technology, while not as mature as its CCTV counterpart, is becoming more common as manufacturers try to emulate the successes of IP CCTV. As the popularity of IP (Internet protocol) CCTV continues to grow, manufacturers, integrators, consultants and, most importantly, clients are increasingly looking at IP for their other security system solutions.