Technical Bulletin

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TECHNICAL REFERENCE

SFQCassetteModification

PanduitSmallFormfactorQuickNet(SFQ)Cassetteshavebeenmodifiedtoachieveuniformityacross

Panduit’scassettelinesandtofullycomplywiththewiringsequencesdictatedinstandardsTIA‐568‐

C.0andTIA‐598‐C.AlthoughcassettesarenotidentifiedordefinedintheTIA‐568‐C.0cabling

standard,Panduithas

decidedtopursuethischangetomeetthespecialcircumstancesandneedsof

ourcustomers.ThiswiringchangeensuresthatPanduitCassettesarefullyinteroperablewithall

productsthatfullycomplywiththeMethodApolarityguidelines.



AsseeninFigure1below,theTIA‐598‐CcolorstandardforabreakoutcablethatisMPOkeydownand

LCkeyupdictatesthatFiber1isblue,Fiber2isorange,etc.Alloddfibernumbersarepositionedin

theA‐sideoftheduplexingclipandalltheevenfibernumbersarepositionedintheB‐sideofthe



duplexingclip.



Figure1.TIA‐598‐CstandardforMPOKeyUptoLCKeyDownBreakoutCableAssembly

IftheLCportionofthi sassemblywastobedesignedkeydown,fibersoneandtwowouldjustswitch

positionssoFiber1isnoworange,Fiber2isnowblue,etc...Evenwiththiskeyrotation,theassembly

layoutstilldictatesthattheoddfibernumbersarepositionedintheA‐sideoftheduplexingclipandall

theevenfibernumbersarepositionedintheB‐SideoftheduplexingclipasshowninFigure2.The

resultofthisalternativeschemeshowninFigure2isaflipintheA‐Bduplexing.



TR105

KeyUp

PAGE 1
SFQ Cassette Modification TECHNICAL REFERENCE TR105 Panduit Small Form factor QuickNet (SFQ) Cassettes have been modified to achieve uniformity across Panduit’s cassette lines and to fully comply with the wiring sequences dictated in standards TIA‐568‐ C.0 and TIA‐598‐C. Although cassettes are not identified or defined in the TIA‐568‐C.0 cabling standard, Panduit has decided to pursue this change to meet the special circumstances and needs of our customers.
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TECHNICAL REFERENCE TR105 Key Down Figure 2. Alternative wiring for TIA‐598‐C Breakout Cable Assembly Legacy Panduit SFQ cassettes had a fiber layout with LC key down as shown in Figure 2 but with the wiring of Figure 1. The wiring in the legacy SFQ cassettes is shown below in Figure 3 and has the odd fibers positioned in the B‐side of the duplexing clip and the even fiber numbers positioned in the A‐side of the duplexing clip. Key Down Figure 3.
PAGE 3
TECHNICAL REFERENCE TR105 In most cases this causes no issues to an installation. However, for those instances where the legacy Panduit SFQ cassette connects to a fully compliant Method A product, a simple solution is to use a patch cord where the LC connectors are switched in the duplex clip.