LAN Cabling

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LAN cabling
Cat5e max cable length 295 Feet is is correct. Some sources state upto 375m Cat6: What distance can I go on Cat6 if I want 100BaseT? What advantage will Cat6 have over cat5e in a large building install.

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I can’t help you with the cat5e vs. cat6 matter.

What I can tell you is that ALL vertical (meaning between floors) and any closet to closet runs should be fiber, not copper.

Copper should only be used within a single room (and not always then), and for the “last mile” run to the individual desktops. When I see the phrase “large building install”, and “Catxxx” I get nervous.

Bob

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  • DrillO
    I agree with Bob big time here. In any large building you need to look at the entire install very carefully and use fibre in all but the last mile. In the case of 5e vs. 6, you always go with the future in mind. Basically Cat 6 will allow Gigabit throughput, so use it. You will grow and having to recable is not a pleasent experience. Same advice goes for the fibre....use it where you need it now as opposed to installing it later when you notice that you should have in the first place. One thing to note is that there are notthe concerns about EFI with fibre. This makes the install much less complicated. Look at your terminal equipement as well. Use Gigabit where ever you can afford it. Why not, most if not all of the PCs you buy today will have Gigabit cards in them anyway. By the way, the distance limits are pretty much the same for Cat 5, 5e, and 6. Good Luck Paul
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  • Ramheka
    HI there cat5e can swicth up to a gig but cat6e can go up to 10 Gps guess what you do not need to use fibre between closets if the distance is less than 95 meters and as copper GIGabit modules are cheaper than the fibre ones so you can do the maths fibre install is more expensive and for sure is your only option for distances longer than 95 m (100 m) I work in a very large complex and it all run on copper with a lot of media streaming (over 500 PCs)and we have no probs bandwith wise who ever will run the cables will need to give you some test results report in which the signal loss should be to the minimum (how? by using good quality material and workmanship) hope this will help clear things up
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  • Bobkberg
    As DrillO (Paul) pointed out above, fiber does not have the EMI problems that copper has. Additionally, Most high speed connectivity tends to be worked out in fiber first, and then refigured in copper. Not an absolute, but a general trend. So - Let me re-pose my suggestion: In any large installation, there should be conduit(s) between all floors and closets so that if your copper installation fails to meet expectations (bites you in the ***), you can pull it out and replace it with fiber without the expense of tearing apart your building. Heck! That's the way I've got my house set up. PVC conduit is cheap stuff. Bob
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  • DrillO
    One thing to add to Bob's excellent posts......be sure to check local Fire Regulations regarding Plenum ways and fire separations....you wouldn't want to have to redo the whole thing because of a regulation that you are not aware of. It wouldn't hurt to check the Electrical Code for your area as well. Don't leave it to a contractor to check. The responsibility will be yours if something is done wrong. Paul
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  • Mks3rd
    Your question any many like it can be answered in several publications out there you can use as a desk reference. Cisco press has one that is ideal for answering questions lie this one called Inteconnecting Network Devices prep book for a Cisco cert. There are others out there but that is one that I have and use. I think that you should go fibre where possible as suggested too. And remeber to follow plenum codes because you do not want to have to pull that down out of false ceilings. Been there done that and it is not fun in any way shpe or form.
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  • RobertB50
    I agree with all the previous answers, but would go for the Gold standard - fiber between floors, copper on the floor with cable in conduit. CAT5e is an incremental improvement designed to enable cabling to support full-duplex Fast Ethernet operation and Gigabit Ethernet. CAT6 provides higher performance than CAT5e and features more stringent specifications for crosstalk and system noise. The quality of the data transmission depends upon the performance of the components of the channel. So to transmit according to CAT6 specs, jacks, patch cables, patch panels, cross-connects, and cabling must all meet CAT6 standards. In addition, all CAT6 components must be backward compatible with CAT5e, CAT5, and Category 3. If different category components are used with CAT6 components, then the channel will achieve the transmission performance of the lower category. For instance, if CAT6 cable is used with CAT5e jacks, the channel will perform at a CAT5e level. Good luck!
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  • SILYRICS
    Cat 5e cable is an enhanced version of Cat 5 for use with 1000BASE-T (gigabit) networks, or for long-distance 100 Base-T links (350 m, compared with 100 m for Cat 5). It must meet the EIA/TIA 568A-5 specification. Virtually all cables sold as Cat 5 are actually Cat 5e. The markings on the cable itself reveal the exact type. Please note the specification is a must when pushing distance. Quality of service is vital in any finished product.
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  • SILYRICS
    If components of the various cable standards are intermixed, the performance of the signal path will be limited to that of the lowest category. The distance without losing data is 220m.Quote Wikipedia again. There is a fine line between an installation providing services to "recognised spec" and just "doing the job". This unfortunatly would only be found for the latter in the future use period when inevitable full use of the products capabilities are required. I hope this assists with the issues. Nige
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