Hi Faisal, All,
Some use cases are shown below. I've also followed the use cases
with some related information that may be of interest to the group.
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Use Cases:
Short Channels: 2 cables 2 connectors, where:
The 2 connectors are in the form of a Jack-Jack coupler,
The 2 cables are any combination of the following widely
available lengths:
0.5ft, 1ft, 0.5m, 3ft, 1m, 1.5m, 5ft, 6ft, 2m.
with wire gauges of 26, 24, (widely available) and 23, 22 (less
common, but possible).
Connector use cases, where one or more connections are open or have
high resistance:
A connector not fully inserted
A dislodged connector due to a broken or compressed locking tab
Off-the-shelf connectors not compliant to TIA specs (#1 below)
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Here's two references that may be of interest to the group on this
topic:
1) The attached pdf presentation contains information regarding
commercially available connectors that don't meet TIA specs.
2) Comments made by Sterling Vaden, chairman of TIA 42.7, the
TIA subcommittee on Copper Cabling Systems, in an article which can
be found at:
http://www.networkworld.com/article/2167079/tech-primers/cat-8--tia-performance-standards-committee-chairman-previews-parameters-of-forthcoming-.html
A couple of comments from this article follow:
Comment #1
Most likely composed of four shielded
copper twisted pairs, with the similar overall diameter as
Category 6A and Category 7A cables, the Category 8 cabling
system under development also will use the popular modular RJ-45
style of connectors. The intention of the Category 8
standard is to be fully backward-compatible with the previous
Category 6A and lower standards.
Comment #2
Vaden says the obvious way to overcome
cable insertion loss is to make the cable bigger. That's not
likely to happen because there are a number of design
considerations that restrict moving to larger cable conductors
than those being manufactured now. Plus, in Vaden's view, using
larger gauges would make the cable too big and bulky. Therefore,
the practical gauge limit for copper, twisted-pair cables
has, for all intents and purposes, already been established
with Category 6A and 7A cables at a maximum of 22 AWG.
This implies 1) 22AWG exists now and may become more common in the
future. 2) Larger gauges than 22AWG based on the TIA standard are
unlikely.
Best Regards,
Ken
On 7/17/2014 2:47 PM, Faisal Ahmad
wrote:
Hi Everyone,
As a follow up to
Jeff Heath’s presentation, “Use Cases”, I am compiling a
list of use cases, and I kindly request for the group to
send use cases to the reflector that you believe the task
force should consider to meet its objectives. This list
will be presented at the next meeting in Ottawa, where the
group can discuss and review the relevance of each use
case.
My plan is to
base this list solely on the inputs of the group over the
email reflector, and I will not be going through past
presentations to generate this list.
The purpose of
this email is just to compile a list, not to debate the
relevance of any specific use case - we can do that at the
next Task Force meeting.
Thank you for
your support and inputs.
Regards,
Faisal Ahmad
VP of Marketing
Akros Silicon
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