每一个有线网络都从它的有线基础设施开始. Ultimately the cabling infrastructure controls the 可靠性 and capacity of the network. Designing and building an effective and efficient network infrastructure is a highly complicated and technical job. And that is where the cabling experts at hga010电脑版网址 can help.
We will survey your physical premise design a wired network infrastructure cabling that meets your organization's specific needs and requirements.
hga010电脑版网址 is a leading provider of affordable network 布线 and structured cabling solutions. 我们专营网络布线, 铜电缆(Cat 5e, 猫6), 光纤电缆, 新办公室布线, 隔间布线, 改造布线, 数据下降, 的声音, data, 保安摄像机连接, 以及任何其他IT线路.
Every network line is fully terminated, toned and tested to ensure reliable network operation. We work directly with end-users and we subcontract for General Contractors and Electrical Contractors as well.
Whether it is a complete warehouse build-out or just adding an office cubicle – hga010电脑版网址 can solve your network infrastructure problems.
When you need new structured cabling installed in your business it is time to select the right installer. But what should you expect from your design and installation team?
每个电缆的设计和安装项目都是不同的. But whether it is a campus-wide project requiring backbone cabling along with horizontal cabling or a simpler single building project there are certain installation team traits and actions that can tip you off to whether or not a provider will meet your needs:
POE vs POE+ vs 4poe (802.3 af vs 802.3在vs 802.3bt)
Power over Ethernet (PoE) offers many advantages over traditional power methods, 包括节省时间和成本, 灵活性, 安全, 可靠性, 和可扩展性. POE also is a low voltage power source and does not require compliance with high voltage electrical codes in most locals.
The main drawback has been the limited amount of available power. 最初,802.3af – the first POE standard adopted by the Institute of Electrical and Electronics Engineers (IEEE) provided 15.4W of power and was sufficient for IP phones and other simple applications at the time. But as more complex applications entered the market, there was an increasing demand for more power.
然后在2009年，IEEE发布了IEEE 802.3at又称POE Plus(或POE+). POE Plus specifies 30W of power at the PoE source and 24W at the device. POE Plus provides much more 灵活性 for the burgeoning market for IoT (Internet of Things). The Internet of Things (IoT) refers to the massive influx of new devices that require power and network connectivity and help connect all aspects of our daily lives.
All kinds of devices are coming onto the market which requires power and data and was not anticipated by the original POE standard. 这包括智能恒温器, 智能门铃, IP摄像机, 基于IP的报警系统, 互联网控制照明, 和Wi-Fi接入点. POE Plus can provide power and data connectivity simultaneously to these devices.
什么是802.3 bt - 4 ppoe?
To address the need for more power, the IEEE introduced IEEE 802.3 2018年英国电信. IEEE也被称为4poe或BT. 802.3bt扩展了PoE可用的最大功率, pushing the power limit of power sourcing equipment (PSE) to 90W and powered devices (PDs) to 71.3W. This new standard achieves this by utilizing all four pairs of structured 布线. 此外,IEEE 802.3bthga010电脑版网址多个PoE类并向后兼容.
802年.3bt standard is likely to be the highest power POE standard for some time. Not only does the standard run up against engineering challenges (it already uses all four pairs of wire to carry power), it also confronts regulatory issues since 90W is very close to the maximum amount of power allowed to send over the wire without having to comply with the standards and regulations required for high voltage 布线.
802.3bt meanwhile does serve the needs of certain high-power devices. These include motorized PTZ (Pan Tilt Zoom) security cameras and Hi-Power Wi-Fi Access Points. 802.3bt also provides enough power to charge phones, tablets, and even laptops.
IP 4 k的相机
Hi-Power wi - fi美联社