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How to choose the right transmission device

How to choose the right transmission device

Dahua transmission products are a key part of end-to-end security solutions, connecting devices while providing efficient data and energy transfer. Our network switches help future CCTV systems by letting you transmit signals over long distances without having to replace cable or switching infrastructure. Dahua ePoE devices are 100% backward compatible with PoE and eliminate the need for multiple switches as they connect IP cameras via category or coaxial cable. Regardless of whether you need wired or wireless, PoE or ePoE, our wide product line has a switch or accessory that offers the ability to route cables over long distances and saves you time and money.

Know your characteristics

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 network speed.

You do not need a gigabit connection on all PoE ports: most IP cameras require a bandwidth of only 4-12 Mbit/s, so a 10/100 Mbit/s connection is fine. However, you must choose a switch with uplink gigabit ports, such as an 8-port PoE Fast Ethernet Switch. This will provide sufficient aggregate throughput for all connected IP cameras in the core network.

Remember that the power consumption of a high and medium IP PoE IP camera is about 8 watts, but the camera will consume more when power surges. For this reason, it is safer to set 25% more: 10–12.5 watts. When viewing your energy budget, make sure your PoE switch has enough system power to power all PoE ports. For example, some 24-port PoE switches have only 180 watts, which is 7.5 watts per channel. This is only half the PoE specification!

Think about what features you really need.

You do not need the most advanced network features, such as VLANs, when choosing a PoE switch for your IP camera system. A PoE switch is typically used at the edge of the network, which in most cases does not require the most complex or expensive features.

One of the most desirable options is to use a managed switch. Dahua offers several managed switches that give you the ability to remotely configure, manage and control your local network and switch settings. Managed switches also allow an administrator to remotely turn on and off the power of the IP camera to easily reboot without deploying a technician.

Using ePoE for cost effectiveness

Our patented Enhanced Power Over Ethernet (ePoE) technology represents the industry's most flexible line of transmitting devices. It is compatible with our ePoE cameras for long 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 through a single CAT5E cable between the IP camera and the switch or IP camera and NVR. This distance without repeaters is three to eight times greater than standard IP devices!

To download Dahua transmission quick guide, click here.