INTELLIGENT BRANDS // Cabling
At a glance…
An example of that formula is as follows for
Insertion Loss:
E 1 ≤ f ≤ 250 1,05 x (1,82 x √f+ 0,016
9×f+0,25/√f)+4×0,02× √f , 4,0 min.
The subject gets even more complex when
looking at using a Network Analyser, EN50346,
(the testing parameters called for in EN50173-1
sets out 401 swept measurement points across
the 250MHz. How is that then going to be
applied to the 350MHz? Do you use the same
points and calculate an additional number or
do you space out those measured points and
therefore start losing some of the granularity and
accuracy of the results. Either way the outcome is
less than ideal.
Conclusions
Whilst on paper having a cable that is said to
operate to a higher frequency may appear
to be an attractive option. To gain a sense of
reality and cut through the ‘Marketing Spin’
the following facts must be remembered and
questions asked.
- Do all the component elements perform to the
350MHz, if not, then any supposed benefit is
immediately lost.
- There is NO effective way of testing a
350MHz, once installed, or ‘In the Field’
- There are NO applications that operate at this
extended frequency. If talking in pure Ethernet
terms, Category 6 already gives additional
Headroom over Category 5e. When it comes
to 1Gb Ethernet that operates at 100MHz
the next level is 10Gb which requires 500MHz
Class EA
- If this additional frequency comes at
additional cost, and provides no known
benefit, the cost has to be seriously
questioned.
This is a classic case of ‘spin’ over substance
being used to try and confuse the end-user and
get them to believe that having a bigger number
means they are getting more for their money,
when it is simply not the case.
(For the full white paper, please visit:
http://www.excel-networking.com/_assets/
downloads/Excel_Whitepaper_Class_E_Channel_
Freq_Myths_Miscon.pdf
50
INTELLIGENTCIO
Siemon launches 2mm
MTP fibre jumpers
Siemon has launched
12-fibre MTP fibre
jumpers with a smaller
2mm diameter cable for
improved pathway fill,
airflow and accessibility
in high density fibre
patching areas.
Connecting MPO/MTP
backbone trunk cabling to active equipment in 40/100
gigabit fibre applications, the jumpers feature the compact
design of the MTP connector footprint and Siemon’s
smaller 2mm RazorCore cable. MTP 2mm jumpers are
available in both B (straight-through wiring) and C polarity
for flexible deployment with a variety of MTP backbone
trunks and configurations while ensuring correct polarity
throughout the channel.
“Accessibility to fibre connections and airflow around
active equipment have become paramount in high-density
fibre patching environments,” says Narender Vasandani,
technical manager MECA at Siemon. “Our new MTP 2mm
jumpers provide the exceptional low-loss performance
that our customers expect from us. At the same time we
offer them an overall smaller diameter to improve airflow,
accessibility, routing and space savings in today’s tighter
fibre patching areas.”
The new MTP 2mm jumpers are part of Siemon’s
comprehensive LightHouse advanced fibre cabling
solutions, and are available with either male or female
connectivity. This supports easy migration from 10 gigabit
cassette-based MPO/MTP channels that use female-tofemale trunk assemblies to 40/100 gigabit applications
that typically deploy male-to-male trunk assemblies.
The jumpers are available in OM3 and OM4 multimode
fibre types and plenum, riser and low-smoke, zero halogen
(LSOH) versions. The jumpers with low loss specification
have a loss budget of only 0.2dB for greater performance
and improved flexibility in 40/100 gigabit fibre
applications.
MTP 2mm jumpers can be deployed with Siemon’s RIC,
LightStack and FCP3 fibre enclosures.
www.intelligentcio.com