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FIGURE 1: IBM. TYPE 1 CABLE
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FIGURE 2: LAN NOISE SOURCES
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FIGURE 3: COMMON MODE CURRENTS
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FIGURE 4: INTRODUCTION OF GROUND LOOPS
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Note: Shield grounded at the TR. Note: At the WA there is a
ground path to shield due to the equipment chassis or cabinet.
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FIGURE 5: F/UTP CONSTRUCTION
FIGURE 6: S/FUTP CONSTRUCTION
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FIGURE 7: UTP VS. F/UTP SUSCEPTIBILITY
* Data provided courtesy of NEXANS/Berk-Tek
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FIGURE 8: UTP VS. UNGROUNDED F/UTPSUSCEPTIBILITY
* Data provided courtesy of NEXANS/Berk-Tek
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absorption loss:alien crosstalk:balance:common mode:differential
mode:electromagnetic compatibility:
equal level transverse conversion transfer loss:
fully-shielded:
ground loop:modal conversion:screen:screened:Shannon capacity
model:
shield:shielded:transfer impedance:transverse converson
loss:transverse conversion transfer loss:
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BER: Bit error rateDSP: Digital signal processingELTCL: Equal
level transverse conversion transfer lossEMC: Electromagnetic
compatibility F/UTP: Foil unshielded twisted-pair (applicable to
category 6A and lower-rated cabling)IEEE: Institute of Electrical
and Electronics EngineersLAN: Local area networkNIC: Network
interface cardS/FTP: Shielded foil twisted-pair (applicable to
category 7 and 7A cabling)SNR: Signal-to-noise marginTCL:
Transverse conversion lossTGB: Telecommunications grounding
busbarTGMB: Telecommunications main grounding busbarUTP: Unshielded
twisted-pair (applicable to category 6A and lower-rated
cabling)Vrms: Volts, root mean square
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W O R L D W I D E L O C A T I O N S
The AmericasSiemon – North America101 Siemon Company
DriveWatertown, CT 06795-0400 USATel: (1) 866 474 1197Customer
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6063Frenchs Forest NSW 2086Sydney, AustraliaTel: (02) 8977 7500Fax:
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3854 1200Fax: (61) 07 3854 [email protected]
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(Melbourne)Level 1, Suite 6161 Queens RoadMelbourne VIC
3004Melbourne, AustraliaTel: 03 9866 5277Fax: 03 9866
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283, Huai Hai Road Shanghai, 200021, P.R. ChinaTel: (86) 21 6390
6778Fax: (86) 21 6384 [email protected]
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Tianhebei RoadGuangzhou, 510620, P.R. ChinaTel: (86) 20 3882
0055Fax: (86) 20 3882 [email protected]
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AvenueBeijing 100004, P.R. ChinaTel: (86) 10 6559 8860Fax: (86) 10
6559 [email protected]
Siemon – UK36-48 Windsor StreetChertsey, SurreyKT16 8ASTel: (44)
(0) 1932 571771Fax: (44) (0) 1932 [email protected]
Siemon — Japan10F Meguro G Bldg. 1-4-16 Meguro,Meguro-ku, Tokyo,
153-0063 JapanTel: 81 (3) 5437-1580Fax: 81 (3)
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Siemon – BrasilAv. Adolfo Pinheiro, 1001 -cj. 14504733-100 São
Paulo/SP BrazilTel: (55) 11 5523 8122Fax: (55) 11 5521
[email protected]
Siemon – PeruCalle Martir Oloaya169 of 701Lima, Distrito
MirafloresPeruTel: (511) 446 5188Fax: (511) 446
[email protected]
