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CAT 5 and Fibre Optic

Discussion in 'Networks' started by UCHEEKYMONKEY, Feb 2, 2007.

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    Honorary Member

    UCHEEKYMONKEY R.I.P - gone but never forgotten. Gold Member

    Can anyone confirm the following is correct?

    100Base-t IEEE 802.3u)
    100Base-T4 Category3 or 4 = 100Metres (4 pair)
    100Base-TX Category5 = 100Metres (2 pair)
    100Base-FX Multimode fibre = 2Km , single mode 10Km
    (100VG IEEE 802.12)
    Category 3 , 4 or 5 (4 pair) = 100Metres
    Multimode fibre = 2Km

    taken from google search.


    no network connectivity through Network points on wall.
    Sceptre (network company) installed network CAT 5 cables in wall.

    Patch hub on 128 hub onto switch number for netpoint.

    No light shown on hub, used pinger in network point, no link displayed. Sceptre say the point is live.
    They suggest we have incorrectly patch the hub?

    There's only two switchs in the cabinet, ones on a 10 ip address and the others on a 128 ip address. The network and LAN card is setup for the 128 address.

    Q) is there a device used in networks to test how long the cables are and if there is a break in the cable?

    Q) what's the maximum length for fibre optic cables?
    Certifications: Comptia A+
    WIP: Comptia N+
  2. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

    I take it the wallport goes to a patch panel and is then patched into the switch in your comms room? If so check the port by patching a cable directly into the switch and then patch your laptop in, if it works then you can safely say that the network point is playing up. 8)
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
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  3. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    The two indispensible tools which aren't too expensive are:
    1) Cable tester. About £20 from Maplins (code N59BY)
    2) Toner. About £30 from Maplins (code N74CC)

    To test for cable quality and length costs a *lot* more

    The way I would check your cabling is as follows:
    (I am assuming that the wall ports are wired back to a patch panel)

    Disconnect patch cables from the patch panel and also from the wall ports. Use the cable tester to check correct wiring. If no response at all then use the toner to find where the cables actualy go.

    (In our place they wired up a refurbed room correctly - but mislabled the patch panel. I used a toner to demonstrate the problem to the facilities manager, and the company had to come back and redo it!)

    Check the patch cables with the cable tester.

    If all checks out then connect a cheap switch at each end. The link lights should come on. At this point you should be good to go.

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