LAN and Telecom Cabling Question about Cat 7 cable

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Subject Author Date
Question about Cat 7 cable reellifetv@hotmail.com 02-01-05
Posted by Crackhead on February 1, 2005, 11:06 pm
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>
> Yes, while there is no North American standard (TIA) for Cat7, there is
the
> ISO Class F, which from a performance standpoint would be Cat7, when TIA
> gets to it. Manufactures that have Class F compliant product in Europe so
> some marketing here using Cat7/Class F.

I would just add a comment that if the category 7 specification draft goes
through changes like category 6 specification did, then whatever supposed
Cat 7 cable you're buying now is not going to pass certification as Cat 7
final (ie. you're wasting your time and money).

If you really want to future proof, use 50/125 multimode fiber.



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Posted by Dmitri(Cabling-Design.com on February 2, 2005, 9:01 am
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Crackhead wrote:


> If you really want to future proof, use 50/125 multimode fiber.

That'd be pushing it too far: there is literally no consumer-grade
equipment that uses fiber, let alone 50 micron. Besides, what are you
going to do with phones? Anyways, I would not argue with the fact that
there will be fiber optics in residential houses in the very near future
(some people are already taking advantage of it), but it will be used
exclusively for broadband access, i.e. for the outside connections.


--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful resources for
premises cabling users and pros
http://www.cabling-design.com/homecabling
Residential Cabling Guide
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Posted by Thomas Beneken on February 2, 2005, 12:44 am
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Dale,

Category 7 is in ISO/IEC 11801.

Regards
Thomas

>
>
> "reellifetv@hotmail.com" wrote:
>
>> I'm about to wire up my house, and have decided to run Ethernet cable
>> pretty much everywhere, using it for both data and audio.
>>
>> Was originally going to use cat 5, but have instead settled on Cat 7
>> (which in the UK only appears to be available from Canford). It will
>> cost quite a lot more, but it's not often I have all my floorboards
>> up, and I'd like to future-proof as much as I can!
>>
>> My plan was to run the cat 7 to deep single- and double-gang metal
>> boxes, to which I'd attach Canford connector plates with holes that
>> will take either XLR, BNC, phono or BNC sockets. This way I have
>> flexibility over what to feed to different locations.
>>
>> One concern is that Cat 7 uses solid core rather than stranded
>> conductors - will this create problems in connecting to the various
>> sockets? I've seen reference to needing to connect using a punchdown
>> block, and I'm not sure how this would work in the setup I'm
>> envisaging.
>>
>> This is a bit of a leap into the dark for me, representing quite a big
>> investment plus a real headache if I put it all in, replaster my walls
>> and lay the floors, only to find it doesn't work, so I'd be very
>> keen for any thoughts.
>
> cat 7, as a industry-wide standard, does not exist. You have one
> particular manufacturer's attempt to jump the gun and grab some
> marketshare. Go with a cat5 or 5e cable, which will be far less
> expensive and likely perfectly fine for your needs. As for solid
> wire, that's what you put into the walls. Stranded wire is for
> patch cords and other wiring that moves about a lot.
> If you really want to future proof, just install conduit from a
> central patch point to each location you may want something in
> the future. Easy enough to pull in whatever cable you need when
> you need it. No locking yourself into whatever today's standard
> is. Do be careful about fire stopping and smoke plugs to follow
> local building code for these conduits.
>
> --Dale
>
>




Posted by Dmitri(Cabling-Design.com on February 2, 2005, 9:22 am
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reellifetv@hotmail.com wrote:


> This is a bit of a leap into the dark for me, representing quite a big
> investment plus a real headache if I put it all in, replaster my walls
> and lay the floors, only to find it doesn't work, so I'd be very
> keen for any thoughts.

> Many thanks,

> Chris

Hi Chris,

As a homeowner I completely understand your concern about future-proofing
your installation. There are, however, too many uncertainties today to
make an economically sound justification for a CAT7 install, especially in
residential environment.

It has been about 8 years now that the first components that later became
CAT6 have been introduced to the market, and most people (myself included)
are still struggling to wrap their minds around the concept of having two
systems - a cheap one (CAT5E) and expensive one (CAT6) - that support
exactly the same set of applications. Only CAT6 is a "better balanced"
system. It can mean a lot to an RF engineer, but in a casual user it
normally generates a question like: "What's In It For Me"? The famous
WII-FM.

Anyways, after 8 years of trumpeting about future proofing with CAT6 we
now have a system that cannot fully support the only application to date
that would NOT work on a cheapy CAT5E: 10Gig Ethernet. It only works for
60 meters or so on a standard CAT6, and everybody's already making CAT6+
that would support 10 Gig on the full 100 meter channel.

So, with that said, it is, obviously your call to decide whether or not to
bet your investments on a technology that does not have any installed base
(let alone residential), no equipment can take advantage of it, it is
terribly expensive because of shielding that's involved and bulky for the
same reason. But, hey, it will be the coolest cabling system on the block.
For the next 10 years, guaranteed.

Considering size of an average family dwelling, I would suggest that
installing a standard CAT6 (which became downgraded in its marketing
importance and discounted almost to the level of CAT5E these days) is as
future proof as it gets in the residential environment.

Good luck! Post here when your project is complete. I'm pretty sure plenty
people would like to learn about your experience here.

--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful resources for
premises cabling users and pros
http://www.cabling-design.com/homecabling
Residential Cabling Guide
-------------------------------------






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Posted by reellifetv@hotmail.com on February 3, 2005, 6:16 am
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Thank you all for your thoughts.

After much consideration, I've decided to go with Cat 6 - the technical
challenges of cat 7 (especially in its termination - RJ55 anyone?) at
too much for a keen amateur like myself.

So, Cat 6 for data, phones and (probably balanced) audio, CT125 for RF,
and SDV75 for video.

Many thanks to you all

Chris



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