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Network Cabling Installation

Network cabling installation drawings should be designed by a BICSI certified RCDD (Registered Communication Distribution Designer). There are a few things that need to be considered.

The type of cabling solution to be implemented - The solar wire vendor or customer will need to select a solutions manufacturer. Siemon, Leviton, Ortronics and Panduit are some of the more common choices. The type of cabling solution will need to be discussed. Cat 5e, Cat 6, Cat 6A or Cat 7 are the copper types of network cables that can be offered. The style of the racks, data jacks, faceplates, patch panels and wire managers will also need to be discussed and chosen. Make sure this is done early as lead times can be long for certain manufactures and styles.

The location of the network equipment and racks - The room where they are housed is commonly referred to as MDF (Main Distribution Frame) Data Room, Telco Room or Telecommunications Room. All cables runs need to be within 100 meters. If cable runs are going to be over 100 meters you will need to add a second Telecommunications Room. This is also called an IDF(intermediate Distribution Frame). The IDF will often need to be connected to the MDF via fiber optic backbone cabling. The MDF will house the service provider feed from the street, which will feed the network. Typically you will also find security equipment and access control equipment here. It is a better design to have all the low voltage systems housed in one location. Measure all equipment and racks that will be required based on cabling quantities. Include access control, security, electrical panels and air conditioning units. The room needs to be large enough to accommodate all equipment.

The pathways of the cable trunks above the ceilings - Cable paths need to steer clear of electrical light fixtures or other sources of EMI (Electro Magnetic Interference). Keep control cable paths in accessible areas of the ceiling for future cable runs and ease of maintenance. All paths should be run above hallways or corridors and cables enter individual rooms on sweeping 90 degree turns. Install a firestop sleeve or putty for all penetrations of a fire wall. Be careful when pulling cables so as not to bend them beyond their bend radius. This will cause a failure when testing. DO NOT tie cables to ceiling hangers or sprinkler pipes. They need to be tied at least every 5' on horizontal runs, and even more on vertical runs. J-hook supports should be anchored to the concrete deck above. Use velcro wraps every 5' or so when finished running cable to give your cable bundles a great looking finish.

Terminating Network Cabling - When terminating cable make sure to check the floor-plan numbering to each cable label to make sure the cables are in the correct spot. If something is not matching leave that cable on the side to be "toned out" later on. Use a cable stripping & cutting tool to get a uniform cut on the cable jacket and to be sure you won't nick the copper conductors inside. Always keep each pair twisted as tight as possible right up to the pins where you terminate the cable. This will ensure you won't get a NEXT or Return Loss failure. Before you start any terminations inquire weather the pinout will be 568A or 568B. This will determine which order the conductors are terminated in and is very important before you start. All cables should be dressed nicely and uniform. The project manager should make a termination chart of the patch panels for the technician that will perform the terminations. This will show the back of the patch panels and where each cable gets terminated with it's label number.
Testing your network cabling - There are a number of cabling testers out on the market. The tester we prefer to use is the Fluke DTX-1800 Cable Analyzer. This is an amazing tool. It will give you a detailed report of each cable that is tested. It tests for wiremap, insertion loss, NEXT, PSNEXT, ACR-N, Insertion Loss and many others. The best part about these new age testers is their troubleshooting skills. The Fluke will tell you where a rubber cable is damaged and which particular conductor is damaged. If you terminated a pair out of sequence the tester will tell you which pair and on what end the error was made. The Fluke does everything but fix it for you! Most clients want to see verified test results. The new testers will provide cleaned up PDF files of the test results. These can be emailed directly to the client.

Hopefully this guide has helped you to better understand the complete system of network cabling. It is an ever changing field and we need to keep up on the latest technology to stay ahead of the curve and offer our clients the best cabling solutions. Please add your comments, suggestions or questions. Please sign up to our email list for the latest cabling news and our shared experiences from the field. You will also receive special offers on future training products before they are released. Thanks for your support.
7.7.17 11:38


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