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Mar 29

Materials needed:  CAT5/5e/6 Cable, RJ45 Plugs, Crimping Tool for RJ45 Plugs, RJ45/Network Cable Tester

To make a Patch Cable using CAT5/5e/6 first, using the cable stripper on the crimp tool, strip about 25mm of the outer jacket to reveal the 4 twisted pairs being careful not to damage the twisted pairs.  A Stanley knife can also be used if the crimp tool does not have a cable stripper. 

Arrange the four twisted pairs as follows from left to right:  Orange White, Orange, Green White, Blue, Blue White, Green, Brown White, Brown. 

Straighten the pairs as much as possible whilst keeping them arranged correctly.  Once the pairs are straightened, trim them down to about 10mm, or enough to allow the RJ45 Wedge to grip the Cable Jacket when crimped, and insert into your RJ45 Plug with Orange White being in Pin Terminal One, Orange being in Pin Terminal Two, Green White in Pin Terminal Three and so on, making sure each of the pairs go into the correct Pin Terminal.

You can now use you crimp tool to crimp the RJ45 Plugs pins into the pairs and the RJ45 Plug wedge onto the jacket of the Cable.

RJ45 pins and pair arrangement shown below

 

After crimping your RJ45 Plugs to each end of your CAT5/5e/6 Patch Cable you’ll need to test the cable to make sure it will work correctly. An RJ45 Tester will test the Patch Cable and indicate if there are any problems with your cable.

If there is an issue with the Cable you’ve made the tester will indicated which end and which pin isn’t working correctly.

Feb 14

Power over Ethernet (PoE) is a technology that lets network cables, such as CAT5e or CAT6, carry electrical power.

For example, a security camera would normally require two connections to be made when it is installed:

A network connection, in order to be able to communicate with a DVR and any display equipment.

A power connection, to provide electrical power the camera needs to operate.

However, if the camera is PoE-enabled, only the network connection needs to be made, as it will receive its electrical power from this cable as well.

Power over Ethernet reduces the number of cables required to connect a POE IP camera

Specifying Power over Ethernet brings many advantages to an installation:

Time and cost savings – by reducing the time and expense of having electrical power cabling installed.  Network cables do not require a qualified electrician to fit them, and can be located anywhere.

Flexibility – without being tethered to an electrical outlet, devices such as IP cameras and wireless access points can be located wherever they are needed most, and re-positioned easily if required.

Safety – PoE delivery is intelligent, and designed to protect network equipment from overload, under powering, or incorrect installation.

Reliability – PoE power comes from a central and universally compatible source, rather than a collection of distributed wall adapters.  It can be backed-up by an uninterruptible power supply, or controlled to easily disable or reset devices.

Scalability – having power available on the network means that installation and distribution of network connections is fast, simple and effective.

PoE has many applications such as:

VoIP phones – the original PoE application.  Using PoE means phones have a single connection to a wall socket, and can be remotely powered down, just like with older analogue systems.

IP cameras – PoE is now found throughout networked CCTV surveillance camera systems, where it enables fast deployment and easy re-positioning.

Wireless – Wifi & Bluetooth Access Points and RFID readers are commonly PoE compatible, to allow remote location away from AC outlets, and relocation following site surveys.

How to upgrade to PoE

Adding PoE to your network is straightforward, and there are two routes you can choose:

A PoE switch is a network switch that has Power over Ethernet injection built-in.  Simply connect other network devices to the switch as normal, and the switch will detect whether they are PoE-compatible and enable power automatically.

PoE switches are available to suit all applications, from low-cost unmanaged switches with a few ports, up to complex multi-port rack-mounted units with sophisticated management.

Adding Power over Ethernet using a POE Switch

A midspan (or PoE injector) is used to add PoE capability to regular non-PoE network links.  Midspans can be used to upgrade existing LAN installations to PoE, and provide a versatile solution where fewer PoE ports are required.  Upgrading each network connection to PoE is as simple as patching it through the midspan, and as with PoE switches, power injection is controlled and automatic.  Midspans are available as multi-port rack-mounted units or low-cost single-port PoE injectors.

 

Adding Power over Ethernet using a POE Midspan

 

Jan 26

TP-Link’s Outdoor CPE access point is dedicated to reliable solutions for outdoor wireless networking applications.  With its centralized management application, it is flexible and ideal for point-to-point and point-to-multipoint applications.  Perfect for when cameras cannot be cabled back to a NVR unit, such as farms yards, remote outhouses etc. over long distances (15km+) point-to-point.

 

  • Built-in 13dBi 2×2 dual-polarized directional MIMO antenna
  • Adjustable transmission power from 0 to 27dBm/500mw
  • System-level optimizations for more than 15km long range wireless transmission
  • TP-LINK Pharos MAXtream TDMA (Time-Division-Multiple-Access) technology improves product performance in throughput, capacity and latency performance, ideal for PTMP applications
  • Centralized Management System – Pharos Control
  • AP / Client / Repeater / AP Router / AP Client Router (WISP) operation modes
  • Passive PoE Adapter supports up to 60 meter (200 feet) Power over Ethernet deployment and allows the device to be reset remotely

The video tutorial below will show you how to successfully set up an Access Point and Client using the CPE Series.

 

Typical Applications:

Long-distance wireless connection by using two CPEs to build a long-distance wireless connection.  Shown in Fig.1.

Fig.1

Large-area wireless coverage using base station combined with sector antenna as the access point at the central station, and several CPEs as clients to build and a point to multi-point coverage.  Shown in Fig.2.

Fig.2.

 

 

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