Dahua’s transmission products are a key part of comprehensive security solutions, connecting devices while providing efficient data and power transmission. Our network switches help future-proof video surveillance systems by allowing for long-distance signaling without having to replace cable or switch infrastructure. Our ePoE devices are 100% backward compatible with PoE and eliminate the need for multiple switches because they connect IP cameras via category or coaxial cable. Whether you need wired or wireless, PoE or ePoE, there’s a switch or accessory in our broad product line that offers long-distance cabling options and saves you time and money.
Know Your Specs
For wired transmission, choosing the right switch for your application will depend on the distance you need to cover, the number of devices you need to connect (which will affect the amount of power you need), and the speed of the network.
You don’t need a gigabit connection on all PoE ports: most IP cameras will require only 4-12 Mbps bandwidth, so a 10/100 Mbps connection is fine. However, you should choose a switch with Gigabit uplink ports, such as the 8-port fast ethernet PoE switch. This will provide enough aggregate bandwidth for all connected IP cameras on the main network.
Remember that high-to-average IP camera PoE power consumption is around 8 W, but the camera will consume more during the power-on surge. For this reason, it’s safer to spec 25% higher: 10-12.5 W. When you review your power budget, carefully make sure your PoE switch has enough system capacity to power all PoE ports. For example, some 24-port PoE switches have only 180 W, which is 7.5 W per channel. This is only half of PoE spec!
Consider Which Features You Truly Need
You don’t necessarily need the most advanced network features, such as VLAN, when choosing a PoE switch for an IP camera system. A PoE switch is normally used at the edge of the network, which in most cases won’t require the most complex or costliest features.
One of the more desirable options is to use a managed switch. Dahua does offer several managed switches, which give you the ability to remotely configure, manage and monitor your LAN and switch options. Managed switches also let an admin remotely cycle power to an IP camera to easily reboot it without deploying a technician.
Leverage ePoE for Cost Efficiency
Our patented Enhanced Power Over Ethernet (ePoE) technology represents the industry’s most flexible line of transmission devices. It’s compatible with our ePoE cameras for extended distances and third-party, ONVIF, PoE, IP cameras at regular distances. ePoE technology transmits video, data, and power up to 800 m (2624 ft) at 10 Mbps via a single CAT5E cable between an IP camera and a switch, or an IP camera and NVR. This distance, without repeaters, is three to eight times longer than standard IP devices!
ePoE saves money for several reasons. First, it requires fewer midspan devices to connect each front-end device to the back end over 100 meters. In addition, ePoE systems avoid expensive fiber solutions at distances up to 800 meters. Finally, ePoE provides extended distances over coaxial cable with adapters. Using existing infrastructure reduces installation cost and time. The infographic below explains how you can use ePoE devices to convert coax to pure IP.
Use Wireless for Challenging Environments
There are many applications that are not conducive to laying cable, such as mining operations, rural areas and construction sites. In those situations, wireless transmission points create bridges to transmit data without cabling. Our wireless base station and wireless CPE have advanced radio cores containing 5Ghz MIMO 2 x 2 technology with directional antennas providing reliable connectivity. The base station and CPE can be configured as point-to-point, point-to-multi-point, or back-to-back.
For point-to-point, two CPE are recommended, since it’s more cost-effective: one is configured in AP mode and another in station mode.
For a point-to-multi-point connection, we recommend one base station, which has a wider wireless angle and higher capacity, working in Access Point (AP) mode. This is paired with several CPEs working in station mode.
A back-to-back configuration is suitable for areas where there is an obstacle such as building between the client and AP. When a client device can’t otherwise transmit data to the center AP directly, back-to-back deployment provides a method to adjust the angle of transmission.
Source: https://us.dahuasecurity.com/?p=56575
