Tài liệu KRONE - White paper - Switchboard Cable - 2003 pdf

Phone: 800-775-KRONE 1 Web: www.KRONE.com
No part of this document may be reproduced without permission. MK016-14 ©2003 KRONE, Inc.
Switchboard Cable
Shielded and Unshielded Switchboard Cables for Faster
Assemblies and Easier Installation
For cable assemblers and end users of cable
assemblies, it is important to consider many factors
when choosing a switchboard cable. As has been the
case in recent years, price seems to dictate which
products will be used for communications applications
without much consideration for features and benefits that
KRONE 25-Pair Shielded Switchboard Cable for assemblies
and central office wiring of POTS, T1 and Basic Rate ISDN
could offset the slightly higher price of top-quality cable.
KRONE Switchboard Cables are unique in a world of
“me too” products designed to meet cost targets with
little or no thought given to specifications. KRONE
Switchboard Cables are high quality, competitively
priced cables, that offer all the features and benefits for
central office and outside plant applications where cable
assemblies are required.
KRONE 25-Pair Unshielded Switchboard Cable
KRONE Switchboard Cables are designed for
terminating outside plant networks to digital switching
and transmission equipment at the service provider’s
central offices, outdoor cabinets and at the customer’s
premises. These products offer enhanced cross-talk
performance in 85- and 100-Ohm designs for supporting
Digital Subscriber Line (xDSL) technologies and
traditional Digital Signaling (DS1/1C/S) technologies.
The enhanced cross-talk performance improves the

network support for shared-sheath technologies.
KRONE Switchboard Cables have been specified by
some of the largest DSLAM and ASAM manufacturers in
the world for deployment of DSL. KRONE cables were
selected due to high-quality, adherence to standards of
tolerance, and competitive prices for use throughout
major service provider networks in North America.
Phone: 800-775-KRONE 2 Web: www.KRONE.com
No part of this document may be reproduced without permission. MK016-14 ©2003 KRONE, Inc.
Features and Benefits of
KRONE 25-Pair Standard
Switchboard Cable
Diameter
KRONE attributes its small cable diameter to its cabling
process. The double binder wraps the conductors four
times to the left and then four times to the right holding
conductors tightly together as they are combined to form
a compact cable. The core diameter of the KRONE 25-
pair Shielded Switchboard Cable (with shielding tape) is
0.285 inches or an average of 12% smaller than the
competition. The core diameter of the KRONE 25-pair
Unshielded Switchboard Cable is 0.255 inches or an
average of 7% smaller than the competition.
(in inches) Competitor 1 Competitor 2 KRONE
Taped Core
Diameter (Shielded)
0.320 0.335 0.285
Core Diameter
(Unshielded)
0.270 0.280 0.255

25-Pair Shielded Switchboard Cable
From Left to Right: Competitor 1, KRONE, Competitor 2
KRONE Switchboard Cable is so small that it fits inside
the jacket of these typical switchboard cables.
(in inches) Competitor 1 Competitor 2 KRONE
Overall Diameter
(Shielded)
0.385 0.385 0.355
Overall Diameter
(Unshielded)
0.385 0.355 0.320
In many cable assemblies, the diameter of a 25-pair
switchboard cable must be less than 0.365 inches. The
overall diameter of the KRONE 25-pair Shielded
Switchboard Cable is 0.355 inches or 8% smaller than
the competition. The overall diameter of the KRONE 25-
pair Unshielded Switchboard Cable is 0.320 inches or an
average of more than 13% smaller than the competition.
Cross-Sectional Area
In looking at the significant diameter difference between
KRONE and competitive cables, this size difference
becomes even more apparent when comparing cross-
sectional area (CSA). It is no wonder that
manufacturers, value-added resellers and cable
assembly firms specify KRONE cable when space-
savings and flexibility are required.
(in square inches) Competitor 1 Competitor 2 KRONE
CSA of Taped Core
(Shielded)
0.0256 0.0281 0.0203

CSA of Core
(Unshielded)
0.0182 0.0196 0.0163
Overall CSA
(Shielded &
Unshielded)
0.0371 0.0371 0.0315
The cross-sectional area of the KRONE 25-pair Shielded
Switchboard Cable (with shielding tape) is 0.0203 inches
or an average of 24% smaller than the competition. The
cross-sectional area of the KRONE 25-pair Unshielded
Switchboard Cable is 0.0163 inches or an average of
13% smaller than the competition. The overall cross-
sectional area of the KRONE 25-pair Shielded and
Unshielded Switchboard Cables is 0.0315 inches or 15%
smaller than the competition.
Roundness
In addition to maintaining tight diameters, the KRONE
cabling process also allows for overall roundness of the
cable. The double binder wraps the conductors tightly
as they first come together producing a more round
cable. The roundness of all KRONE Switchboard
Cables is not affected by spooling the cable onto reels,
as is the case with the competition.
(in %) Competitor 1 Competitor 2 KRONE
Overall Roundness
(Shielded)
75% 70% 93%
Overall Roundness
(Unshielded)

85% 63% 90%
Phone: 800-775-KRONE 3 Web: www.KRONE.com
No part of this document may be reproduced without permission. MK016-14 ©2003 KRONE, Inc.
25-Pair Shielded Switchboard Cable
From Left to Right: Competitor 1, Competitor 2, KRONE
Each cable sample was taken from a spooled reel.
Maintaining roundness of the cable eases
connectorization in cable assemblies. KRONE cables
help reduce assembly time, shrink-wrap and other
material scrap due to their consistent roundness.
KRONE 25-Pair Shielded Switchboard Cable
as part of a cable assembly.
Concentricity of Jacket
Concentricity is defined as the ability to maintain
consistent jacket thickness around its circumference.
The concentricity of the jacket for the KRONE 25-pair
Unshielded and Shielded Switchboard Cables is 90%,
which is excellent when compared to the competition.
(in %) Competitor 1 Competitor 2 KRONE
Jacket Concentricity
(Shielded &
Unshielded)
90% 80% 90%
Standards of tolerance are critical to the
connectorization process, and concentricity is no
exception. This cable dimension allows for faster
assemblies, reduced scrap, and easier installation.
Compliances
• UL Subject 444/CSA C22.2 No. 214
• (UL)-C(UL) Type CMR/CMG

• NEC 800 CMR
• ICEA S-90-661
Construction
• Conductors… 24 AWG Solid Tinned Copper
• Insulation… Lead-Free Semi-Rigid PVC
• Pairing… 2 Twist per Foot (Min.)
• Color Coding… Standard Telephony, Bandmarked
• Rip Cord… Applied Under the Jacket
• Jacket… Lead-Free Flame Retardant PVC
• Shielding (Shielded)… Aluminum/Polyester
• Drain
Wire (Shielded)… 24 AWG Solid Tinned Copper
Electrical Characteristics
• C
onductor DC Resistance (Max.)… 28.6 Ohm/kft. @ 20°C
• Resistance Unbalance (Max.)… 5%
• Mutual Capacitance (Unshielded)… 21.0 pF/ft.
Nominal @ 1 kHz
• Mutual Capacitance (Shielded)… 28.0 pF/ft.
Nominal @ 1 kHz
• Characteristic Impedance (Unshielded)… 85
±
15
Ohms @ 1 MHz
• Characteristic Impedance (Shielded)… 80
±
15
Ohms @ 1 MHz
• Temperature Rating… 60
°

C
• Voltage Rating… 300 VDC
Pair Counts
While the primary focus of this paper is 25-pair
configurations, KRONE also offers its Standard
Switchboard Cable in a variety of popular pair
configurations.
Shielded Standard Switchboard Cable
No. of O.D. Jacket Weight
Product No. Pairs Inches Color lbs/kft Pkg.
T0224HA-GYyy 2 .13 Gray 13 Reel
T0324HA-GYyy 3 .14 Gray 16 Reel
T0424HA-GYyy 4 .17 Gray 22 Reel
T0624HA-GYyy 6 .19 Gray 30 Reel
Phone: 800-775-KRONE 4 Web: www.KRONE.com
No part of this document may be reproduced without permission. MK016-14 ©2003 KRONE, Inc.
T0824HA-GYyy 8 .21 Gray 35 Reel
T1224HA-GYyy 12 .24 Gray 52 Reel
T1624HA-GYyy 16 .30 Gray 68 Reel
T1824HA-GYyy 18 .31 Gray 74 Reel
T2524HA-GYyy 25 .35 Gray 101 Reel
T2824HA-GYyy 28 .39 Gray 115 Reel
T3224HA-GYyy 32 .44 Gray 130 Reel
T5024HA-GYyy 50 .48 Gray 195 Reel
T7524HA-GYyy 75 .58 Gray 275 Reel
T0024HA-GYyy 100 .67 Gray 372 Reel
TC524HA-GYyy 150 .77 Gray 554 Reel
TCC24HA-GYyy 200 .95 Gray 774 Reel
Unshielded Standard Switchboard Cable
No. of O.D. Jacket Weight

Product No. Pairs Inches Color lbs/kft Pkg.
T0224H0-GYyy 2 .13 Gray 11 Reel
T0324H0-GYyy 3 .14 Gray 14 Reel
T0424H0-GYyy 4 .16 Gray 18 Reel
T0624H0-GYyy 6 .18 Gray 24 Reel
T0824H0-GYyy 8 .20 Gray 30 Reel
T1024H0-GYyy 10 .22 Gray 35 Reel
T1224H0-GYyy 12 .23 Gray 46 Reel
T1624H0-GYyy 16 .24 Gray 58 Reel
T2024H0-GYyy 20 .29 Gray 65 Reel
T2524H0-GYyy 25 .32 Gray 92 Reel
T3224H0-GYyy 32 .36 Gray 114 Reel
T4024H0-GYyy 40 .41 Gray 130 Reel
T5024H0-GYyy 50 .45 Gray 176 Reel
T7524H0-GYyy 75 .55 Gray 254 Reel
T0024H0-GYyy 100 .62 Gray 326 Reel
TC224H0-GYyy 125 .70 Gray 436 Reel
TC524H0-GYyy 150 .75 Gray 544 Reel
TCC24H0-GYyy 200 .91 Gray 762 Reel
Features and Benefits of
KRONE 25-Pair Unshielded Enhanced
Performance Switchboard (EPS) Cable
Diameter
While KRONE Standard Switchboard Cables exceed
industry standards and customer expectations, we live
up to our name for innovation through development of a
100-Ohm Enhanced Performance Switchboard (EPS)
Cable. This higher-performing cable with 24 AWG solid
tinned copper conductors has the same overall diameter
when compared to Competitor 1’s standard 85-Ohm

switchboard cable.
(in inches) Competitor 1 Standard KRONE EPS
Overall Diameter
(Unshielded)
0.385 0.385
Additionally, KRONE adheres to the same tolerances of
roundness and jacket concentricity for the Unshielded
Enhanced Performance Switchboard (EPS) Cable as it
does for its Unshielded Standard Switchboard Cable.
KRONE 25-Pair Unshielded Enhanced
Performance Switchboard (EPS) Cable
Compliances
• UL Subject 444/CSA C22.2 No. 214
• (UL)-C(UL) Type CMR/CMG
• NEC 800 CMR
• ICEA S-90-661
Construction
• Conductors… 24 AWG Solid Tinned Copper
• Insulation… Lead-Free Semi-Rigid PVC
• Insulation Diameter… .039” Nominal
• Pairing… Category 3 Type Lays
2.5 Twist per Foot (Min.)
• Color Coding… Standard Telephony, Bandmarked
• Rip Cord… Applied Under the Jacket
• Jacket… Lead-Free Flame Retardant PVC
Electrical Characteristics
• C
onductor DC Resistance (Max.)… 28.6 Ohm/kft. @ 20°C
• Resistance Unbalance (Max.)… 5%
• Mutual Capacitance… 20.0 pF/ft. Nominal @ 1 kHz

• Characteristic Impedance…
100 ±15 Ohms @ 1 MHz
• Temperature Rating… 60
°
C
• Voltage Rating… 300 VDC
Phone: 800-775-KRONE 5 Web: www.KRONE.com
No part of this document may be reproduced without permission. MK016-14 ©2003 KRONE, Inc.
Pair Counts
While the primary focus of this paper is 25-pair
configurations, KRONE also offers its Enhanced
Performance Switchboard (EPS) Cable in a variety of
popular pair configurations.
Unshielded Enhanced Performance
Switchboard (EPS) Cable
No. of O.D. Jacket Weight
Product No. Pairs Inches Color lbs/kft Pkg.
CS0424H0-GYyy
4 .23 Gray 21 Reel
CS0624H0-GYyy
6 .25 Gray 30 Reel
CS0824H0-GYyy
8 .28 Gray 37 Reel
CS1024H0-GYyy
10 .31 Gray 44 Reel
CS1224H0-GYyy
12 .33 Gray 49 Reel
CS1524H0-GYyy
15 .34 Gray 49 Reel
CS2024H0-GYyy

20 .41 Gray 83 Reel
CS2424H0-GYyy
24 .44 Gray 97 Reel
CS2524H0-GYyy
25 .44 Gray 105 Reel
CS3224H0-GYyy
32 .50 Gray 130 Reel
CS3624H0-GYyy
36 .52 Gray 144 Reel
CS4024H0-GYyy
40 .54 Gray 162 Reel
CS4524H0-GYyy
45 .55 Gray 180 Reel
CS5024H0-GYyy
50 .60 Gray 193 Reel
CS6024H0-GYyy
60 .65 Gray 229 Reel
CS7224H0-GYyy
72 .70 Gray 293 Reel
CS7524H0-GYyy
75 .71 Gray 307 Reel
CS8024H0-GYyy
80 .77 Gray 327 Reel
CS9024H0-GYyy
90 .81 Gray 362 Reel
CSC0024H0-GYyy
100 .85 Gray 380 Reel
CSC0224H0-GYyy
102 .85 Gray 438 Reel
CSC2024H0-GYyy

120 .93 Gray 501 Reel
CSC4424H0-GYyy
144 1.0 Gray 584 Reel
CSC5024H0-GYyy
150 1.2 Gray 595 Reel
Features and Benefits of
KRONE 25-/50-/100-Pair Unshielded High
Performance Switchboard (HPS) Cables
KRONE switchboard cables are chosen time and again
for their excellent quality, performance, size and
flexibility in many applications, including DSL. Because
of the rapid deployment of DSL in smaller configurations
requiring even smaller cable assemblies, KRONE
developed the 25-/50-/100-Pair Unshielded High
Performance Switchboard (HPS) Cables. These cables,
which are even smaller than KRONE Enhanced
Performance Switchboard (EPS) cables, are excellent
for installations where space is limited and the
dimensions of the enclosure must be maintained.
Diameter
To maintain tight dimensions, a technician may be
tempted to remove the jacket of the cable to be installed.
However, to avoid the problematic issues of unprotected
pairs and difficult cable management, KRONE designed
the HPS cables to reduce the overall diameter, maintain
cable safety requirements and improve performance.
HPS cables use an insulation material with a higher
dielectric constant than traditional PVC, which makes it
possible to reduce the insulated conductor overall
diameter by 15-20% while still maintaining 100-Ohm

characteristic impedance.
(in inches)
KRONE
EPS
KRONE
HPS
%
Reduction
Overall Diameter 25-Pair 0.440 0.375 15%
Overall Diameter 50-Pair 0.600 0.510 15%
Overall Diameter 100-Pair 0.850 0.680 20%
Cross-Sectional Area
While the space-saving ability of KRONE HPS cables
may be apparent in its smaller overall diameter, it
becomes overwhelmingly obvious when evaluating
cross-sectional area (CSA). HPS cables provide almost
a one-third reduction in cross-sectional area when
compared to the other smallest cables in the market,
KRONE’s own EPS cables.
(in square inches)
KRONE
EPS
KRONE
HPS
%
Reduction
CSA of 25-Pair 0.152 0.110 27%
CSA of 50-Pair 0.283 0.204 28%
CSA of 100-Pair 0.567 0.363 36%
Electrical Characteristics

The insulation material is flame retardant meeting cable
safety requirements. As previously stated, HPS cables
maintain 100-Ohm characteristic impedance due mainly
to the insulation material. Additionally, the lower
dielectric constant of the insulation material provides
other interesting performance benefits for HPS cables
when compared to EPS cables. At 772 kHz, attenuation
was reduced from 2.2 to 1.9 dB/100m (worst case). At
the same frequency, power-sum cross-talk improved by
5 dB (worst case).