+ Post New Thread
Results 1 to 8 of 8
Wireless Networks Thread, Performance costs of fibre patching in Technical; I need to run a fibre link from the server room to three cabinets which are not a million miles ...
  1. #1
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Performance costs of fibre patching

    I need to run a fibre link from the server room to three cabinets which are not a million miles apart from each other. To save having to install three fibre runs from the server room, should it theoretically be ok to run an 8 core fibre to cab1, then a four core from cab1 to cab2, then a four core from cab2 to cab3. I would propose just patching them straight through, so no active connections (ie switches) at the connecting cabinets. Any thoughts?

  2. #2

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,650
    Thank Post
    516
    Thanked 2,443 Times in 1,891 Posts
    Blog Entries
    24
    Rep Power
    831

    Re: Performance costs of fibre patching

    We have a couple of cables set up like that and they work fine. In an ideal world, I would have direct fibres as this would allow for spare capacity for future use but this isn't an ideal world.

  3. #3
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Re: Performance costs of fibre patching

    Yeah, I've done this once to extend fibre connectivity from an existing link to another cab. But since I'm running in new now, I just wanted to check that this isn't likely to be costly in terms of performance (which I don't think it is). cheers

  4. #4


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339

    Re: Performance costs of fibre patching

    for each connector you'll loose 0.5db, (less for a splice)
    Can you compromise (and lower the number of connectors to the last cab by running from cab1 direct to cab3,

  5. #5
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Re: Performance costs of fibre patching

    Yep, probably. Are you able to give me an idea of what level of loss (db) is acceptable. I appreciate that type of fibre/quality is likely to make this difficult to quantify without knowing these factors.

  6. #6


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339

    Re: Performance costs of fibre patching

    It really depends upon the equipment, probably the switch/module will have a tolerance. We speculated here:
    http://edugeek.net/index.php?name=Fo...wtopic&t=11104

    I reckon about -5 db. ish,

  7. #7
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Re: Performance costs of fibre patching

    ok, thanks for that.

  8. #8

    plexer's Avatar
    Join Date
    Dec 2005
    Location
    Norfolk
    Posts
    13,343
    Thank Post
    624
    Thanked 1,584 Times in 1,421 Posts
    Rep Power
    414

    Re: Performance costs of fibre patching

    Surely running a 4 core to cab 2 and then a 4 core to cab 3 doesn't offer any redundancy?

    Be better with a 16, 8 , 4 or has been suggested 1 to 2 and 1 to 3.

    We have several cabs looped through like this

    Ben

SHARE:
+ Post New Thread

Similar Threads

  1. The costs of a RM network?
    By tosca925 in forum Windows
    Replies: 46
    Last Post: 21st January 2009, 04:11 PM
  2. Cutting Printing Costs
    By krisd32 in forum How do you do....it?
    Replies: 36
    Last Post: 8th May 2007, 02:11 PM
  3. Printing Costs
    By eejit in forum Budgets and Expenditure
    Replies: 19
    Last Post: 24th November 2006, 12:32 AM
  4. RBC Costs
    By Nij.UK in forum General Chat
    Replies: 9
    Last Post: 12th July 2006, 03:57 PM
  5. Patching Windows
    By Michael in forum Windows
    Replies: 10
    Last Post: 19th December 2005, 12:14 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •