| Constant
symmetry with intermediate sheath/protective sheath for Uninet 3004 2P/4P
and Uninet 8002 4P |
The
intermediate/protective sheath provides an additional mutual stabilisation
of the two or four wires. In this way, the mechanical strength is
increased and allows smaller bending radii than those specified by the
standards. In addition to increased stress resistance during installation,
this has considerable advantages for complying with electrical values when
using RJ-45 wall outlets. |
|
| Low
attenuation |
In a
cabling link consisting of patch panel, cable and wall outlet, the cable
plays the decisive roll with respect to attenuation. Low attenuation
cables permit, on the one hand, exceeding the maximum allowable cable
length of 90m specified in the standards without violation other values
set in the standards. On the other hand, the
reserve offers an additional security with respect to the use of future
applications (e.g., gigabit Ethernet). |
|
| Lowest
attenuation through star-quad geometry |
A precise
star-quad allows a high mutal symmetry of the individual wires. It is the
basis for a very high crosstalk attenuation relative to the twisted pair
cables. And - the geometrically fully symmetrical shape of the star-quad
simplifies installation (e.g., requires less space). |
|
| Maximum
screen attenuation due to foil and braided screens |
A low transfer
impedance or small coupling resistance results from the combination
of foil and braiding. As a result, coupled interference is diverted better
through the increased current carrying capacity of the screen over a
wide frequency range. As a side benefit, there is an increased mechanical
stabilisation of the cable structure. |
|
| Insensitive
against external electrical and magnetical influences |
The
electromagnetic field of unscreened twin conductors is not limited to the
immediate area between them (Fig.1). For an installed data able, the
nearby electrical and magnetic enviroment of the cales in practically all
cases is neither uniform or constant. For unscreened data cables, these
fields directy affect the conductor pairs and modify their electrical
transmission properties (Fig.3).
If a screened data cable is used (foil and braided screen of a high
quality, e.g., Uninet), then the electrical field is limited to the area
within the screen and external influences have a negligible effect on
cable properties (Fig.2). The impedance is not affected by the enviroment.
The result is stable transmission properties (Fig.4).
|
