Read All About It: PoE White Paper

August 3, 2017 at 8:00 AM


Power over Ethernet (PoE) is a revolutionary technique that provides both power and data in one Ethernet cable. PoE equipment eliminates the need to run power to remote network devices, which allows for greater flexibility and is ideal for remote locations where traditional power sources are not available. PoE can save time and money and is becoming more frequently used in wired and wireless connectivity applications with network devices such as wireless access points, switches and IP cameras.


Our white paper takes a deeper look at PoE, its history and how it is used in today’s telecommunications networks. Topics covered include:


History of PoE

  • -          How the IEEE was called upon to create the 802.3af standard to help the growth of the PoE market with a unified standard              to rely on
  • -          Power Sourcing Equipment (PSE)
  • -          Powered Devices (PD)


PoE Details and Variations

  • -          Mode A vs. Mode B
  • -          Mode A: Combining power via Phantom Powering
  • -          Mode B: Power over Ethernet spare pairs


Click here to read our PoE white paper.


All of our free white papers are available from our website by clicking here.


White Paper: Layer 3 Routing at the Network Edge

July 13, 2017 at 8:00 AM


Implementing Layer 3 at the edge of a LAN can have many benefits including increased network security, greater availability and improved network utilization, but it’s not always clear where Layer 3 routing should be used in the LAN. Traditionally, Layer 3 routers were at the core of the networks and acted as gateways to the Wide Area Network. As technology, pricing and availability have changed, Layer 3 routing has moved closer to the edge of the network. 


Our white paper discusses when to employ a Layer 3 switch at the edge of a network and gives definitions and applications for several widely used routing protocols including RIP, DVMRP, PIM and OSPF.


Topics covered in our Layer 3 white paper include:


Layer 2 Switching vs. Layer 3 Routing


Defining Layer 3 Routing Protocols

    -      Routing Information Protocol (RIP)

    -      Open Shortest Path First (OSPF)

    -      Internet Group Management Protocol (IGMP)

    -      Dstance Vector Multicast Routing Protocol (DVMRP)

    -      Protocol Independent Multicast (PIM)

    -      Virtual Router Redundancy Protocol (VRRP)


Layer 3 Routing Applications

    -      Assigning static IP routes to VLAN/Sublets

    -      Routing between Layer 2 VLAN

    -      Routing on high-speed uplinks to the core

    -      IP multicast routing with IGMP and DVMRP

    -      PIM-DM multicast routing in the LAN

    -      PIM-SM multicast routing protocol

    -      OSPF to route IP traffic through LAN into the core router

    -      VRRP in the LAN


Click here to read our Layer 3 Routing at the Network Edge white paper.


All our free white papers are available from our website by clicking here.


Read All About It: Wi-Fi Antenna White Paper

June 30, 2016 at 8:00 AM


Omni, Yagi, Rubber Duck, Patch....with all of these antennas it’s no wonder that our customers frequently ask which antenna is right for their wireless application. Fortunately, we have a white paper to help answer that question.


When planning a wireless network, deciding which antenna is best for your application can be confusing. Different wireless networks require different antenna configurations.


Our white paper takes a deeper look at the types of antennas available for various WLAN applications and includes examples for typical point-to-point and multi-point wireless network architectures.


Topics Include:

·       Omni-directional antennas

·       Directional antennas

·       Common Wi-Fi network applications

             - Office buildings

             - Homes

             - Outdoor cafés

             - College campuses


Click here to read our Wi-Fi antenna white paper.


All of our free white papers are available from our website by clicking here.


WiFi Network Installation Best Practices

June 18, 2015 at 10:00 AM


Installing a wireless network can be a lot like putting a puzzle together. All of the various pieces need to align properly for your WiFi network to perform at optimal levels.


First, you must choose the correct antenna for your application taking into account polarity, frequency and antenna gain. Additionally you must determine if you require directional or Omni-directional antennas or a combination of the two.


Next, antenna installation best practices should be considered, including geography of the installation site, obstructions as well as distance and throughput requirements. Depending on whether your installation is indoors or outdoors different rules will apply including factors such as reflections, multipath, path loss, Line of sight and types of obstructions such as cubicle walls or trees in an outdoor installation.


Then cabling, surge protection and enclosure options must be factored into the wireless network design.


Needless to say, it can be overwhelming to put all of the pieces of the WiFi network puzzle together.


Fortunately L-com's white paper WiFi Antenna Installation Best Practices walks you through the process to ensure that all the pieces align.


   Topics detailed in our white paper include:


·       Selecting the right antenna

·       Antenna polarity, frequency and gain

·       Antenna installation best practices, indoor and outdoor

·       Line of sight, Fresnel Zone and path loss

·       Cabling and surge protection considerations 


A successful wireless network installation is dependent upon proper planning and consideration of all environmental factors as well as knowing the overall system requirements including signal coverage, throughput etc. Our white paper will give you the tools you need for a successful wireless network installation.   


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