|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
73.153.246.181
In Reply to: RE: Ars Technica dissects an AudioQuest Vodka ethernet cable posted by Sprezza Tura on July 24, 2015 at 08:46:30
I'm not a networking authority but it's not uncommon knowledge.RJ45 connectors are fine for CAT7 cables if you wish to only achieve CAT6A specs. CAT7 is pretty much a non starter as we wait on CAT8. CAT7 is not even recognized by the TIA/EIA. Look it up. It's not hard to find... or maybe it is because they don't officially recognize it!
Don't get the cable type mixed up with meeting a spec. CAT7/7A cable with RJ45 connectors do not meet CAT7/7A specs.
Basically CAT7 is a solution looking for a problem and promoted by cable makers.
CAT6a is perfectly suited for 10GBASE-T per Cisco and others but not suited for 40GBASE-T (the next step), and CAT7 doesn't cut it for 40GBASE-T.
So, CAT7/7a is caught in between so to speak. It's not needed for 10GBASE-T and it doesn't cut it for 40GBASE-T and beyond.
And IMHO, none of this even matters in the world of home networking for audiophile applications. Plain ole CAT5E (or CAT6A if you must) is MORE than sufficient.
Edits: 07/24/15Follow Ups:
Very interesting...
As I understand it, it is the RJ45 connector that does not meet spec.
Speculating: could it be the pin configuration causing a problem with cross-talk?
From what I understand, the non-RJ45 connector for CAT7 does meet spec. Manufacturers are supplying adapters to female RJ45 ports.
What I am curious about, besides exactly why it doesn't meet spec, is how is CAT8 with RJ45 termination going to meet a spec that is even higher in bandwidth?
"Asylums with doors open wide,
Where people had paid to see inside,
For entertainment they watch his body twist
Behind his eyes he says, 'I still exist.'"
...how is CAT8 with RJ45 termination going to meet a spec that is even higher in bandwidth?"
A couple ideas come to mind.
- The CAT8 specs calls for a shorter maximum distance so that helps a lot.
- New manufacturing techniques with tighter tolerances in terminating the connector to the cable.... techniques that will be impractical to impossible to achieve in hand soldered boutique cables.
Nice written article.
"Propagation Delay & Delay Skew""Propagation delay is the amount of time that passes between when a signal is transmitted and when it is received at the opposite end of a cabling channel. The effect is akin to the delay in time between when lightning strikes and thunder is heard - except that electrical signals travel much faster than sound. Delay skew is the difference between the arrival times of the pair with the least delay and the pair with the most delay. Transmission errors that are associated with excessive delay and delay skew include increased jitter and bit error rates."
For what it's worth and it could be nothing, note the specified 'delay skew' is about half for CAT 7 (30ns) as that for CAT 6/6a (50ns).
Edits: 07/25/15
Thanks for the detail and the overview.
There is more to the story, but you provide generally accurate info I believe.
The TIA was not able to agree on standards, and there was of course differing agendas and politics involved. Cat7 has been adopted happily by industry for mission critical applications and is quite standard in data centers.
But yes, supposedly Cat8 is next.
But to be clear, the technical benefits of Cat7 are there...superior noise rejection, higher bandwidth and much better connectors.
"But to be clear, the technical benefits of Cat7 are there...superior noise rejection, higher bandwidth and much better connectors."
True, and I have found them an improvement most likely due to the shielding. I use good CAT7 for audio, not boutique ones.
As I have posted before, Rosewill, at a buck a foot, is all you will ever need unless you are a NASA rocket scientist.
I see the part time guy got his stuff deleted. lol
Yes, it seems so. Ran to his mommy?
Your assessment of his so called review was spot on. This type of fictional nonsense must be called out.
Yes... There is no way a network could perform as badly as he initially claims unless the cables were wrapped around fluorescent lights!
It's hilarious his network has dropouts and glitches and then the HQ cables ride in on a white horse to save the day. LOL
The funniest part is he claims to be an "IT professional" yet still had the gaul to publish such crap.
Edits: 07/25/15
yes, and his assertion that there was a colossal difference between networked and locally stored files shows his knowledge of how to set up a computer audio system is non existent.
Having read some of his other computer audio related reviews, this is obvious.
I posted something over on Critics. What do you think?
Edits: 07/25/15
Nice! i will comment.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: