C511-fl\J"LD
`
`12.9 Tirning
`
`TSOHEC SE32-3 : 1993
`ANSTHEEE Std S-02,3, 1993 F'_.diI.inn
`
`12.9.1 Overview. The successful interconnection of multivendor system components mandates that
`delay and bit less he llocated Fairly and realistically among the various system elements. The balance of
`this section defines the upper limits of delay and bit loss allocated to each component. These values allow
`proper operation with the worst-case system configuration of five levels of hubs, special links, maximum-
`length cable segments throughout the network, and colliding DTEs at extremes of the network.
`
`12.9.2 DTE Tirning. DTE Initial Transmit Delay is the time from the first full transition (due to the first
`D'UTP'UT_UNI'T cfpreamblel from the ll-[AC to the first full transition (after startup bit loss, if any) at the
`MDI. This delay shall not exceed BET. The start bit loss shall not exceed 1 bit.
`DTEs shall correctly receive frames that are preceded by 13 or more bits of preamble plus 3 bits of -.:si'd>.
`There is a delay between the reception of signal at the PMA input of a DTE and operation of the deferral
`process in the MAC. Therefore, there is a window in which a DTE may fail to defer to a transmission even
`after it has arrived at the input. The DTE Deference Delay is the time from the receipt of the first transi-
`tion of the preamble at the MDI until the last moment that the DTE might start transmitting at the MIDI.
`This delay includes the following components:
`
`(1) The delay from the first input transition at the MDI to GARRIER_UN at the PLS-MAC interface
`(2) The delay through the MAC processes from C.ARRIER_DNto the last moment that a new transmis-
`sion would miss being deferred
`{3} The delay from the first 0UTPUT_UNIT at the MAC-PLS interface to the first output. transition at
`the MIDI
`
`The DTE Defer-enoe Delay shall be no more than 21BT.
`The DTE Collision Shutdown Delay is the time from the first CVL or CVH arriving at the MDI of a trans«
`mitting DTE until that DTE transmits IDL at that interface. This time shall be no more than QEET +
`jamSize=5El-ET. This limit shall not start until fter the <sfd>- has been transmitted.
`
`12.9.3 Medium Timing. The Medium Transit Delay is the time from when a signal enters the medium
`until that signal leaves the medium. This delay shall not exceed ¢ET_
`
`12.9.4 Special Link Tilning. Th.e Special Link Transit Delay is the time from when a signal enters a
`special link until that signal leaves the special link. This delay shall not, exceed 15BT. The preamble leav-
`ing a special link shall be no more than 2 bit cells longer than the preamble sent to that special linl; and no
`more than 1 bit cell shorter than the preamble sent to that special link. For the purposes of these limits
`only, the first bit transmitted shall be considered part of the sflence of the preceding IDL unless it meets
`the requirements for the succeeding bits specified in 12.5.3.1. 1 and 12.fi.3.1.2.
`
`12.9.5 I-Iub Timing. Hub Startup Delay is the time from when the first bit cell of the preamble arrives at
`a hub until the first bit cell (also preamble) leaves that hub. This time shall be no greater than 12BT_ The
`preamble sent by a hub shall be no more than 1 bit cell longer than the preamble sent to that hub or more
`than 4 bit cells shorter than the preamble sent to that hub. For the purposes of these limits only, the first.
`hit transmitted shall be considered part of the silence of the preceding IDL unless it meets the require-
`ments for the succeeding bits specified in 12.5.3.1,1 and 12.5.3.1.2.
`Hub Idle Collision Startup Delay applies to any case in which GP arrives preceded by fewer (or no) hit
`times of preamble than the Hub Startup Delay. The time from arrival of the first. bit cell (either preamble
`I11‘ CPl Until the first bit cell leaves the hub shall be no greater than IZBT.
`Hub ‘Transit Delay is the time from the anival of any bit cell at a hub to the transmission of the corre-
`sponding bit cell from the hub. This delay shall not exceed BBT, excluding the cumulative efiecta of clock
`tolerance.
`
`The transit (propagation) delay between the upward and downward sides of the Header Huh shall be
`negligible.
`Hub Delay St'retch."Shrin_k is the increase or decrease in a huh’s transit delay due to the Efffictg gf diffcl-_
`ing clock rates. The clock rate tolerance of 0.01% specified in 12.32.41 and the maximum frame size of
`1513 octets specified in -1.4.2.2 yield a maximum stretch or shrink of (55 + E + 1513 - 3} ' 0.01% ' 2 -r. 3BT,
`both at any given hub and through an entire network,
`
`239
`
`Aerohive - Exhibit 1026
`0237
`
`

`
`1.993
`IFln'.'i.:"l'FII.“. F1-tl:IId'-.'l
`.!\L'1'fl|.-'lI'.'.l-.'..‘_'. Ftrl !l[r'.!.-'1, 1993 Edition
`
`LD-CAL .°L_N'EI M'F.TR.£'IPUl..11‘l\N .-‘|.'l'lF.'A NET?"-T|RK5'
`
`Huh Collision Detect De_l3_1.; is the time required For a hub tndebect muifiple irwoming signals and
`Erma.-I-‘rni.-u'<ieI1 uI'CP. The tiaxe until trnnfintleslurl of the fiJ'EI.C'\=’H tn’ CV1 Shall be no 15!’:-."il1t".I' than 2l.B'T.
`
`Hub Anive Coliiaion Eta_!'t1Jp Deiay in tl'.u- limo from the arrival tithe find CVH or CV}. of :1 C? pattern
`at a hub that is repeating bit tulle until trmiumimsion ofthe fir.-.=t CV1“! or CV1 from the hub. This delay
`shall he no greater than 12131‘ in either the upward or downward direction.
`
`Hub (!nl]:L|sim1 Sliutclown Dela]! is tile tin:-e from IDL an-iving at a hub that is pausing on or generating
`GP until that hub atnrta. tra_namitl;i.m: JDL. This delay ahell be limited to BET The limit is relaxed to 25ET,
`Iirrwevor. for the upward side of a hub that in generating CF. This extra allowanoe lfl made to avoid requir-
`ing implmnentefion of a separate <.E'l'Il2l} detection mechanism it: each port C-lithe l'|.1l ll.
`
`l2.'ll.'I Safety. Imp-Ien1ento1's are urged be consult the relevant local, national, and in terunlioual safety regu-
`lations to ensure compliance with the appropriate standards. EIA CB3-1981 levee .-'t.o.I:m:.
`l12I} provides
`additional g'u.id.onn:e |:a.u::erning many relevant regulatory requirements.
`
`hood installation prsuztice. as defined by applicable cod-ea am:l1'egulations. ahall he Followed EGMA-97
`{sou none: [11I_I deaerihea sa&t;.- nequimms-:tt.s for [null area networks.
`
`13.19.] Ia-elation. Ea).-;}3 P 1mmfl'mwlunIl5l1MlbeEDiBted fl"-|:e:n frame ground. This aieeu-ieal sep-
`arntioia shell withstand at least one ofthe following elertrieal atrength t-Pate:
`
`I,]J
`
`lit)
`
`lfifltl V Irma) at 50 to 60 Hz for till 9., :.ij:'].1lii5tl an specified in Section 5.3.2 ol'lECT"1.Ib|i-:.et:I'on 550 [8].
`
`33:35!) V {doll for fill 5, applied an apeeified in 3eI:"titIn 5.3.2 of]E-C Publication 913012333 Reference [8]).
`
`on A eequence often 2400 V impllleefl nfidtornaflng polarity, applied at i.nt.er'Wa.lB of not less: than 1 s,
`The ahnpe of the impulaea shall be 1.2350 pa: {L2 .111! Virtual fifint time. 5-0 tls virtual time of half
`'-Htluirl. Ila defined in IEC Publication fill Isue H.e‘t'erenne lllll-
`
`'['hs-re shall be no Lneulation breakdown. awn defined in Section 5.3.2 ofIEC Publication 95C! tee-a Reference
`lS]'I, during the test The resietan-:.'e after the tat shall he at team: '2 Mil, measured at 50E} V {dc}.
`
`22.1132 Teinphany Vettages. The use of bedding wiring twinge with it the gmesiibiiity o! wi:-i-ng errors
`that may a:n.nnec1; telephony vnltnfietl to IBASES equipment. {Hirer than voice aignulx {which are very low:
`voltage), the pflmary voltagea that may be enltoumered are the "'lJatte1'_1H' and Tinping voltages. Although
`there in. no universal standard that conatzraina them, the following maximums generally apply:
`
`{ll
`
`llattn.-ry voltage to an on-hook telephone line ia about -56 V (dc) applied to the line through a bal-
`l1l1L'.L‘d alt!-ll E). Source impedance. This I.'o'l|.1u;e is used to power the t-elepl1oI.1e instrument and detect
`the ofl”-hook condition. SI:-uroe ind ut'I:aIII:-'.I can cause large spikes on disconnect.
`
`Bnttexy voltage to an off-hank telephone line ia also about —fiEi V (dcl applied to the line tlirnugh a
`balanced 40D 51 aeurne impedance, but must nf the voltage appears across the source impedance
`because the telephone ina.tru.ment'a impedarune ia relnt-ively much lower.
`
`Ringing voltage is a enropositr signal. The first portion can be up to 1.75 V peak at 26- to 66 H1, lim-
`ited lay.’ a 150 {ll an-urce resistance or :1 400 to-E-llll Q source inductive
`The second partial:
`is -56 V {dc} limited by a. 30-0 to 6011 5} source impedance- Large‘ spikes can occur at tin: start and
`end at‘ each ring.
`
`Although IBASEE equipment in not required to survive aneh wiring hazarde without damage, applica-
`tion of any of the above voltages ahall not result in any safety hazard.
`
`l'1|'l.'J"I'l-'3: Wiring e:I1'nrs may impoae ta1e1.uhou_\rvnlhqp- dill‘-trr-trl.ir1IJ:.' across the I|_EA5l.-‘£5 trunsmllbum ur rr-l‘.‘.‘-l\'flJ‘i. lincuune lI1+.=.- hermi-
`n:1IJ.nd'I I"r.n1LIl..I.u:u-e l.l.I{Elj' be be present across a rceelvrrli Lnpnl. 1a of nubatuntially lower impedance than an nll‘-haul. telephone instru-
`u.1e1.|1.. lnrrwwnr, l‘t3DE.‘l.\|"B]'E will generally appear ‘on I11» lnlnplmnn p:-‘stem as ofi‘-hook telephones Full ring vollngm, themefm-e, will be
`applied for null‘ I-l‘lDr1= Tmriodfi of time. "I'l1rIsnutt-erll lhlll ml.‘ oouplud using transfonnnrfi will ain:iJrLrL.r appuur lll-t'H r.Ifi'-hoolt telephones
`fIl'L-ou;:h pwllupa a bit more slowly} due to low NIiII|.'fl.rU.1'| of blue Lmoatbrnaer coil.
`
`2:10
`
`Aerohive - Exhibit 1026
`0238
`
`

`
`ISO.I"[EC 8302-3: 1993
`ANSHIEEE Std 302.3, 1993 Edition
`
`13. System Considerations for Multisegment 10 Mbls Base-band Networks
`
`13.1 Overview. This section provides information on building mnltisegment 10 Miss hasehand networks
`within a single collision domain. The proper operation of a CSMAJCD network requires network size to be
`limited to control round-trip propagation delay to meet the requirements of 42.3.2.3 and 4.4.2.], and the
`number afrepeaters between any two Data Terminal Equipments iDTEsl to be limited in order to limit the
`shrinkage of the interpacket gap as it travels through the network. This section applies only to networks
`that contain lflBASET segments.
`NOTES Information on 103:9-SE—T is included to begin the process of developing this section. It is intended tl-mt 3.6.1 and 10.7.1 be
`merged into this section in the future and that any new IUEASE sag-rssnt; be added to this section.
`
`13.2 Definitions. Tbrrninology used in Section 13 is defined here:
`
`collision domain.A single CSMNCD network. If two or more Media Access Control (MAC) suhlayera are
`within the same collision domain and both transmit at the same time, a collision will oocor. MAC aublayers
`separated by a repeater are within the same collision domain. MAG sublayers separated by a bridge are
`within differcni: collision domains.
`
`link segment. The point-to-point full duplex medium oonnection between two and only two Medium-
`Dependent Interfaces (hIEDIs}.
`
`segment. The medium connection, including connectors, between MDIS in a GSMAICD LAN.
`
`13.3 Trnns1ni.ssion System Model. The physical size of a IDBASE-T network, or mixed-media network
`containing 1|'.'-‘BASE-T link segments, is eonstrained hythe limits of individual network components. These
`limits include the following:
`
`(1) Cable length and its associated propagation time delay.
`(2) Delay of repeater units (start.-up and steady-state),
`(3) Delay of MAUs (start-up and steady-state}.
`(4)
`Interpacket gap shrinkage.
`(5) Delays within the DTE associated with the CSMAJCD access method.
`
`Table 13-1 summarizes the delays for the various network media segments:
`
`Table 13-1
`Delays for Network Media Segments
`
`Maximum
`Number of
`MAUB per
`Segment
`
`1041-
`so
`
`Maximum
`Segment
`Length
`{:11}
`
`so:
`135
`
`11100
`2
`mo’
`2
`
`
`
`1 D'l‘FJ1 MAU soson 1165 c
`'c=3><103m.I's
`lkeltuel maximum segment length depends on cable characteristics; see 14.1.1.3.
`‘A111 is not a segment.
`
`Aerohive - Exhibit 1026
`0239
`
`

`
`ll5D.I']EC r!E|J'A-3 : I9-33
`A.‘-Islfllil-ZR :-Eu! so: 5. was
`
`LOCAL .+.~m M}-l'f!IuF{:».=.I'£'AJs' .uu-;A NETWORKS;
`
`In addtcitrn. Table 14-1 arummarizes chm delays hr Lhe IJJBASE-T ILIAU; S-k-rtmn 3, due delay‘! for the
`IOHASIIS MAU; S-¢I'.“.i.nn 1D, tbs: d£ln_1-1 ft: the IUE-ASE2 MAL"; and SE.-cI:ion 9, than delays of we fiber up-1;i.::
`Inter-raprnter link {FDEEL} Bml 1.139 rap-mu
`The fullowing m-twork tapolnngy co-n.l'Irn!Inu apply for IDBAEE-T network in WI!" on min!-d-media net-
`marks n:nnt.n:'m1ng JDBASE-'1' En}. Icgmnnlsi
`
`(ll Repeater sets are required for all wgmunl iuhmaonnectilan.
`112} MAU1 that are part ufrapeawr act: munl. tnwurd the maximum number of MA.|.',lH on a segment.
`13,1 Tlm trmmmiasiun path permitted hntwn-an any two DTES may mnsinl. of up tn five aegunmts, four
`mpcntar sets {including npticrnnl M11»), I.wu MAT..Ta. and two AUIB.
`(4-J W1‘-an u network path nannihtu of fnur repeater nets and five segments, up to three U-I’ Lha segments
`may bn mania] and the remainder must he link neg-rnents (Figs 13-] and I3-2|. when five segments
`are pmnent, Bach FODEL linl‘. Iir:|z'.I'I:Ian‘l. uhnulul not need 500 m.
`:5} when a. network pub tiflnlii-II-ti‘ of Harm mptmta sets and ion: segments. thy maximum niiawnble-.
`length srlth-e F‘3i}H.- segmenla la I900 In each. as specified in 9.9{Fig1.'.l-31
`
`Aerohive - Exhibit 1026
`0240
`
`

`
`I!-'uI.'|r'IFT flfiifl-3 : I993
`.-L‘-'5I."'FFl".E 5-Ia! MU! .'-I, 199'.‘ Edition
`
`Flap:-star Sat
`
`nguuur sot
`
`Fla-p-ular Sat
`
`Flnpnttr 5|-t
`
`-HUI
`
`1!! I fill-SE1
`
`F-I-'1 I llll-it-IE2
`
`155 ll I3!-I55!
`
`F1313-1
`lblniumm 'I‘fl.I:uuinian Path with Three Coaxial Clbl-e E-egnantl
`
`Imp-nahr Sal
`
`' Hap-III" fill
`
`' mini -1
`Ulll. In rnlnl
`
`‘Fig 13.2
`Example of Ifllximum 'I‘rI.l1Iminio.n Path Using Coaxial Cable Ellfllllfillll,
`IIIBAEE-T Link Sefmuntl. and Fiber Optic Link Elegmnnh
`
`Aerohive - Exhibit 1026
`0241
`
`

`
`'1
`.‘-u'-£r}'.'
`".'_H£ I-“ti-'.I'
`.'a.'151l'1H.P- .'*'I-' 4
`
`‘EH-I.'\
`'.C "~'_
`
`l'"*?ffi F-'_i.'.i.C|:
`
`LOCAL A.“-I" I-11. _
`
`'n-Hf" .|
`
`||-i.'- Mir '~‘-TT"l.'w'I':uI-1.1-'5
`
`Hblilblll-I‘ Sal
`
`-u._---___-.......
`
`Fiber Optic Link
`56fl|'3‘4'5M 1 F’-F“
`
`Fiber Optic Link
`Segment 1 km
`
`Fiozmmm S13!
`
`Rn-pastor Sal
`
`I-"PH fi'Il'lIlfl'
`‘IUD In
`
`L:n|| 5-aurnqlul
`ml} In
`
`Fig 13::
`Hnlmple of I'r[a.x3'.mu.m ‘I1-nmrmmalion Path with Three Repantnr S-«ta.
`F‘:-ur Link Segments (13'm.r are l0l'|' III 1lIl1.r‘Lh'E-T and Two are I lull [Film-I:I'}
`
`Aerohive - Exhibit 1026
`0242
`
`

`
`ISDHEC Ed-02-3 : 1993
`ANSLFIEEE Std 502.3, 1993 Edition
`
`14. Twisted-Pair Medium Attachment Unit (MAU) and Baaehand Medium,
`Type 1{lB.a.SE-T
`
`1-1.1 Scope
`
`14.1.1 Overflow. Section 14 defines the functional, electrical, and mechanical characteristics of the ’I‘3rpe
`1(]EASE—T MAU and one specific medium for use with that M.-“LU, The relationship of this specification to
`the entire ISOHEC 3302-3 CSBIAICD Local Area. Network Specification is shown i.n
`14.1. The purpose
`of the MAU is to provide a simple, inexpensive, and flexible means of attaching devices to the medium.
`This MAU and medium specification is aimed primarily at edifice applications where twisted-psi: cable is
`often installed. Installation and reconfiguration simplicity is allowed by the type of cable and connectors
`used.
`
`The 1|]-BASE—T specification builds upon Sections 1 through 7 and Section 9 of this standard.
`
`14.1.1.1 Medium Attachment Unit (MAUI. The MAU has the following general characteristics:
`
`(1) Enahies coupling the Physical Signaling (PLS) suhlajrer by way of the Attachment Unit Interface
`CAUU to the baseband twisted—pair l_lILli defined in Section 14.
`(2) Supports message traffic at a data rate of 10 ll-fhr's.
`'
`(3) Provides for operating over [I In to at least 100 in (328113 of twisted pair without the use of a
`repeater.
`(4) Permits the Data Terminal Equipment CDTEII or repeater to confirm operation of the MAU and
`El".'I1l.l.alJl.l11.'_‘,|' of the medillrrl.
`(5) Supports network configurations using the CSMAICD ccess method defined in ISOHEC 3302-
`3 : 1993 with baseb-and signaling.
`(6) Supports a point-to-point intercotmection between MAUS and, when used with repeaters
`multiple ports, supports a star wiring topology.
`{7} Allows incorporation of the MAU within the physical bounds of a DJTE or repeater,
`
`14.1.1.2 Repeater Unit. The repeater unit is used to extend the physical system topology and provides
`for coupling two or more segments. Repeaters are an integral part of all 1ll-BASE-T networks with more
`than two DTEs (see Figs 13-1 and 13-2). The repeater unit is defined in Section 9. Multiple repeater units
`are permitted within a single collision domain to provide the maidmum connection path length specified in
`Section 13. The repeater unit is not a DTE and therefore has slightly different requirements for its
`attached MAUs, as defined in 9.4.1. Repeater sets with IUBASET M_PiUs are required to provide the auto-
`par'I:1'tiom‘reconnection algoritlzlm on those ports, as specified in 9.6.6.2.
`
`14.1.1.3 'I‘wisted-Pair Media. The medium for 1-:}B.A.SE—T is twisted—pair wire. The performance spec-
`ifications of the simplex link segment are contained in 14.4. This wiring normally consists of 0.4 mm to
`0.6 mm diameter [26 AWG to 22 AWG] unshielded wire in a rnultipair cable. The performance specifica-
`tions are generally met by 100 m of I15 mm telephone twisted pair. Longer lengths are permitted providing
`the simplex link Segment meets the requirements of 14.4.. A length of 100 m, the design objective, will he
`used when referring to the length of atwisted-pair link segment.
`
`14.1.2 Definitions. This section defines the terminology specific to Tfivpe 10B-ASE—T ll-[AUs and their
`application to repeater units.
`
`hit time {ET}. The duration ofone bit symbol (HER).
`
`c=olli.sim1.Acondition that results from concurrent transmissions from multiple signal sources.
`
`common-mode voltage. The instantaneous algebraic average of two signals applied to a balanced circuit,
`both Signals referred to 11 common reference. Also called longitudinal voltage.
`
`245
`
`Aerohive - Exhibit 1026
`0243
`
`

`
`ISOJTEC BED2-3 : 1993
`ANSIHEEE Std 302.3, 1993 Edition
`
`LDCIAL A.‘-’\l'[l METRGPQLITAN AREA NETWORKS;
`
`FIEPEATEFI
`09
`ore
`
`ISIIIJFIEC B-ll]-2-ll
`C5ll.A.v"|.'.‘-D LAN I..rLl"£R3
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`
`APPLI BATIK} N
`
`PRES EHTATIDN
`
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`
`'
`
`HIGHER LAYERS
`
`Lo EICAL “MK
`coNTHca_
`MC’
`MEDIA ACCESS
`CONTROL
`IMA-Cl
`
`PHY51CAL
`SIGNALING
`
`Twisted-Pal'i_Linlt Seumenl
`
`Fig 14.1
`IDRASE-T Relationship to the ISO Open Systems Interconnection (OBI)
`Reference Model and the IEEE 302.3 CSMAFCD LAN Model
`
`cross connect. A group of connection points often wall- or rack-mounted in a wiring closet, used to
`mechanically terminate and interconnect twiatetl-pair building wiring,
`
`diflerentinl-mode voltage. The instantaneous algebraic difierence between two signals applied to a hal-
`anced circuit, both signals referred to a common reference. Also called metallic voltage,
`
`Medium-Dependent Interface {llv[DI]. The mechanical and electrical interface between the twisted-ps.ir
`link segment and the MAU.
`
`Physical Medium Attachment {PMM suhlayer. The portion of the MAU that contains the functional
`
`Physical Signaling (PL-S) suhlayer. The portion of the Physical Layer, contained within the DTE, that
`provides the logical and fiinctional coupling between the EILAU and the Data Linli Layer.
`
`simple: link segment. A tWo—wirc path between two LIL-'-l.Us including the terminating connectors, con-
`sisting of one or more twisted pairsjoined serially with appropriate connection devices, for example, patch
`fields and wall plates {see Fig 14-2).
`
`twisted pair. Two continuous insulated conductors helicslly twisted around one another (see Fig 14-2).
`
`twisted-pair cable. A group of twisted. pairs Within a singie protective sheath.
`
`twists-ti-pair cable hinder group. A group of twisted pairs within a cable that are bound together. Large
`telephone cables have multiple hinder groups with high in.terl:Ii.nI:ler group near-end crosstalk loss.
`
`twisted-pair link. A twisted-pair link segment antl its two attached MAUs (see Fig 14-2].
`
`246
`
`Aerohive - Exhibit 1026
`0244
`
`

`
`1.'!':'\.|_-\'°£'.'l"
`
`I30-'1 EC 3-BC3v3 ' ‘.591!
`.‘.3'-'-3.I'Il'.'I'.'1"Y .'3'I.r: E02 3, I993 E'd3li.:.r.
`
`Li/3/'&_2
`2 Twiaied Pairs
`
`Twlsied-Pall Link Segment ——-.-
`{2 Sirnplln Link Segments}
`
`..j..——j ‘I'wis1a-d-Pllr Llnit L
`
`(I)
`
`Twis1or.l Pairs
`
`/ \\
`
`Crosa Connect "W
`
`Twnslad-Pair Link Seaman: _.—..-‘
`
`Twisia-ct-Fatr Lfnk
`
`lb}
`
`twlltid-pair link Infmnnt {duplex link. augment}. T‘wu aimpiez link zlelgmmlu for mnnescting two
`MMJI {um Fig ltl-2).
`
`1-l..I.£I Application Par-ntpcclivn. This Iat!r:1.iIm nr.u+nu the broad objactivea unll umu1.n1pt.in:-us m1dpr],_1,-in};
`Lhr up:-nificatinna defined throughout SBL't.iorI 1-1.
`
`Aerohive - Exhibit 1026
`0245
`
`

`
`Isoneo cause: use
`ANSLFIEEE std 502.3, 1993 Edition
`
`14.1.3.1 Objectives
`
`Local. AND METROPOLITAN AREA Nrrwomas;
`
`{1} Provide the physical means for communication between LAN Data Linlt Layer Entities.
`(2) Ensure compatibility of independently developed physical and electrical interfaces.
`(3) Provide a communicaiion charuiel with a mean bit error rate, at the physical layer service interface
`cfless than one part in 105.
`(4) Provide for case of installation and service.
`(5) Ensure that fairness of DTE access is not compromised.
`(5) Provide for low-cost networks, as related to both equipment and cabling.
`(7) Make use of telephone twisted—pair building wiring and telephony wiring practices.
`
`14.1.3.2 Compatibility Considerations. All iruplementations of the ttvisted—pair link shall be com-
`paiible at the l\'1'DI. The MAU and the medium are defined to provide compatibility among devices designed
`by different manufacturers. Designers are free to implement circuitry within the MAU in an application-
`dependent manner provided the MD] and AUI {when implemented} specifications are met.
`
`14.1.9.3 Mode of Operation. The IDBASE-T MAU is capable of operating in um-rm::l' mode only (see
`7.1.4). The MAU shall not operate in monitor mode.
`When normal mode is in operation, the MAU fiinotions as a direct connection between the medium nd
`the DTE or repeater. Data from the DTE or repeater is output to one of the simplex link segments of the
`link segment, and data received on the other simplex linli segment is input to the DTE or repeater.
`
`14.1.4 Relationship to PLS a.ndAU1. A close relationship exists between Section 14 and Section T. Sec-
`tion 14 specifics the physical medium parameters and the PMA logical fiinctions residing in the physical
`Ml-‘LU. The MAU provides services to the PLS defined in Section '3 by means of the AUL 10BASE-T 1'.-[AUs
`support a subset of the AUI services specified in Section ‘T. 1flIBASE—T MAUs do not support the optional
`isolate function, the optional C0 circuit, or the optional CS1 signal on the CI circuit.
`The design of an external MAU component requires the use of both Section 14 and Section T for the PLS
`and AUI specifications.
`The figures and numerous textual references throughout Section 14 refer to terminology associated with
`the AUI (that is, DU, DI, and CI}. Since an embodiment of the IOBASE-T MAU does not require the imple-
`mentation of an AUI, the D0, D1, and GI circuits may not physically exist. However, they are logically
`present and MAU operation is defined in terms of them.
`
`1-1.2 MAU Functional Specifications. The MAU provides the means by which signals on the three AUI
`signal circuits to and from the DTE or repeater and their associated interlayer messages are coupled to the
`twisted-pair link segment. The ll-[AU provides the following functional capabilities to handle message flow
`between the DTE or repeater and the twisted—pair link segment:
`
`{1} Transmit function. Provides the ability to transfer Manchester-encoded data from the DD circuit to
`the TD circuit. While not sending Manchester-encoded data on the TD circuit, the MALT sends an
`idle signal, TP_lDL, on the TI] circuit.
`(2) Receive function. Provides the ability to transfer ManI:l1est.er-encoded data from the RD circuit to
`the DI circuit. While not sending Manchester‘-encoded data on the DI circuit, the 1\-[AU sends an idle
`signal, IDL, on the DI circuit.
`{3} Loopback function. Provides the abilityto transfer Manchester‘-encoded data from the D0 to the DI
`circuit when the MAU is sending Manchester-encoded data to the TD circuit.
`{4} Collision Presence function. Provides the ability to detect simultaneous occurrence of Manchester-
`encoded data on the RD and D0 circuits and to report such an occurrence as a collision.
`sigrm.Lqu.oIi£y_en'or Message (SQE) Test fimnlion. Provides the ability to indicate to the D-TE that
`the Collision Presence function is operational and that the sig11::I_qua.i£c_5r__eITor message can he sent
`by the MAU.
`Jabber function. Provides the ability to prevent abnormally long reception of Mancheeterenmded
`data on the DD circuit from indefinitely disrupliug transmission on the network. ‘While such a con-
`dilion is present, transfer of Manchester-encoded data by the 'I‘1-ansniit and Loopback functions is
`disabled.
`
`(5)
`
`(6)
`
`Aerohive - Exhibit 1026
`0246
`
`

`
`GSMAICD
`
`ISOIEU 3-BU2-3 : 1993
`ANSUIEEE Std 302.3, 1993 Edition
`
`(Tl Link lntegrity Test function. Provides the ability to protect the network from the consequences of
`failure of the simplex link attacliad to the RD circuit. While Such a failure is present, transfer of
`Manchestcisencodcd data by the Transmit, Receive, and I_.oo_p-back functions is disabled.
`
`14.2.1 MAU Functions. The M!-‘LU shall provide the Transmit, Receive, Loopback, Collision Presence,
`Jabber, and Link Integrity Test filnctions. The SQE Test function Shall be performed by M!-'LUs that are
`connected to DT1-Es and shall not be performed by MAUS. that are connected to repeaters, A capability may
`be provided in the MAU to activate or inhibit the SQE Test function. It is not required that a MAU deter-
`mine that it is connected to either a DTE or a repeater and automatically activate or inhibit the SQE Test
`function.
`
`14.2.1.1 Tranit Function Requirements. The MAU shall receive the signals on the DD circuit
`and send them to the TD circuit of the ll-EDI. A positive signal on the A lead relative to the B load ofthc DO
`circuit shall result in a positive signal on the TD+ (Transmit Data +l lead ofthe MDI with respect to the
`TD— lead.
`
`At the start of a packet transmission, no more than 2 bits may he received from the D0 circuit and not
`1;:-ansmitted on the TD circuit, In addition, it is permissible for the first bit sent to contain phase violations
`or invalid amplitude. All subsequent hits of the packet shall be reproduced with the differential voltage
`specified in 14.3.1.2.1 and with no more jitter than is specified in 14.3.1.2.3. The second bit transmitted on
`the TD circuit shall be transmitted with the correct timing and signal levels. The steady-state propagation
`delay between the DO circuit input and the TD circuit shall not exceed 2 ET.
`For any two packets that are separated by 9.6 |.1s or less, the starbup delay (bit loss plus steady-state
`propagation delay) of the first packet shall not exceed that of the second packet by more than 2 HT.
`Whenever data is not being transmitted on the TD circuit, an idle signal, TP_IDL, shall be transmitted
`on the TD circuit. TP_EDL is a. start ofidle, as defined in 1-1.3.1.2.]... followed by a repeating sequence ofa
`16 ms t 8- ms period ofsilence (the time where the differential voltage remains at 0 mV i 50 mVl and a link
`test pulse {sea 1-13.1.2.1}. Following a packet and start of idle, the repeating sequence shall start with a
`period of silence.
`"Transmission of TP_IDL may be terminated at any time with respect to the link test pulse. It shall be
`terminated such that no more than the first transmitted bit of a packet is corrupted, and with no more
`delay than is specified for bit less and steady-state propagation.
`
`14.2.1.2 Receive Function Requirements. The MAU shall receive the signals on the RD circuit of
`the M131 and send them to the DI circuit. A positive signal on the RD+ [Receive Data +) lead relative to the
`El.D— lead of the Mill shall result in a positive signal on the A lead with respect to the B lead of the DI
`circuit.
`
`At the start ofa packet reception from the RD circuit, no more than 5 hits may be received on the RD cir-
`cuit and not transxnitted onto the DI circuit. In addition, it is permissible for the first hit sent on the DI cir-
`cuit to contain phase violations or invalid data; however, all successive bits of the packet shall be sent with
`no more than the amount of jitter speci.‘l'1-ed in 1-1-.3.1.3.1. The steady-state propagation delay between the
`HD circuit and the DI circuit shall not exceed 2 BT.
`
`For any two packets that are separated by 9.6 us or less, the start-up delay of the first packet shall not
`exceed that of the second packet by more than 2 BT.
`
`14.2.1.3 Loopbaclc Function Requirements. When the Mall is transmitting on the TD circuit and
`is not receiving RD_i.n.pu£ messages (1-1.2.2.4) on the RD circuit, the MAU shall transmit on the DI circuit
`the signals received on the DC! circuit in order to provide loophflcli Dfthe t1'a.I1SII1itl.'-ed Signal. At the start of
`packet transmission on the TD circuit, no more than 5 bits of information may he received from the DD cir-
`cuit and not transmitted to the DI circuit. In addition, it is permissible for the first bit sent on the DI circuit
`to contain phase violations or invalid data; however, all successive hits of the packet shall meet the jitter
`specified in 14,3,1,3.1 (that is, 13.5 ns plus 1.5 nsl. The steady-state propagation delay between the DD cir-
`cu_it and the DI circuit shall not exceed 1 ET.
`
`1-1.2.1.4. Collision Presence Function Requirements. The MAU shall detect as a collision the
`simultaneous occurrence of activity on the DO circuit and the RD circuit while inthe Li.n.I§‘Iest Pass state.
`While a collision is detected, a CSO signal {sec 13.1.2] shall be sent on the CI circuit. The signal shall be
`
`249
`
`Aerohive - Exhibit 1026
`0247
`
`

`
`IECl.I"IIE‘.|.'.".' Bill‘!-'i -. I991!
`.-\NHD'IElElE Std 305.3, 1593 Edition
`
`LI}l'_‘.ALAN[| METROPOLITAN AREA NETWORKS:
`
`presented to the CI circuit no more than 9 HT after the eccurtenee nfa collision. The signal shall be dena-
`eerterl withinfl B'l"a.‘.ter theflflcircuitnrthe Rflcirzuitdiax-ngca Erma active tnidlc.
`Wlzuufisoiaaaaerteden the-C1 circuit dueweeolliaicn.tl1edaIaan1heE.Ddrcmt aluillhenenttothe
`I31-circuit within 9 ET.
`When the RD circuit changes from active to idle and date is present en the DO circuit, the data an the
`DDeirc1:Ilteha.llb-esanttuthe Illcircuitvrithin El ET.
`
`The uignel presented on the C] circuit in the absence of cnlliainn. SQE test. or Jabber lhlll be the IDL
`signal.
`
`I.-13.1.5 .l1[na.£_qualt'f:|-'_error Meaaage (BQEJ Test Function Require-mtg. The SQE 'I'e.at func-
`tion ehnll be p-erth-rmed by MAU_a that are cu-nnucte-d ta D'I'E3 and shall not be perfnrrned by M.AUe that are
`connected tan repeaters. When the SQE tent in perfurmed, the MAU shall send CSO ml the Cl circuit fhr a
`lime ‘SQEJ-eat’ beginning a lin1e 'SQE_test_wnit-' after the last punitive transition of a packet on the DU
`circuit. The value of 'SQE_teat’ shall he 10 HT 2 5 ET and the value ef‘SQE_teat_wait' shall be between
`0. no and 1.6 us. This functiun ahnuld uae as much ufthe nnrmel enllisinn detection and signaling circuitry
`as possible without intrnducizng e£tra.l1.euus signal: an the TD circuit er the Ell circuit.
`The flfltlaignalehall natbcaentby thvaSQETtntfi1nctionwhileinanyofthe LinE:Teflt.Fatl cant-ce.
`
`14.2.13 Jnhbu Frmctinn m ‘The MAU ahnll nnntain a ncif-interrupt capability to pre-
`vent an illegally lung tra.na:m1'.aai.c-n bjr .1 DTE finm pIel'1nenentl_I_r disrupting lranllnieeion on the network
`and to disable l-anpbacll: tn the DI circuit [Fig lll-5}. 'l'hc MAU shall provide a winduw ':tmit_mair' during
`which time the Transmit filnctinn may I:D‘Dl.'l.1':Il:I|2I|.I!l_1|' ‘transmit fllnutplut meaaagea tn the TD circuit. The
`value c1"":1uit_mu-.1‘ shall be between 2!] me and 1:50 1n.a.lfa trsnemieeinn exceeds thin duration, the Jabber
`function ahall inhibit the Loopbaclr. function and the tranamiaaion -of TD_output maaaagea by the Tl-anamit
`Ilnnclinn. and ehall aend the CS0 signal an the G1 circuit. This ahnll continue un'|:il outputjdlc haa been
`cantinuouuly preeent en the D0 circuit fur a time ‘um'eb'. The value uf‘I.n:u'ab' shall be 0.5 nae t 0.25 a.
`[t is permissible ta activate the Jabber fiinctinn when the TD circuit tranamittcr in sending ‘l"D_cutpui.'
`roeaaagea for longer than ‘xmit_max'.
`The MALI shall not activate ila Jabber t'u:nctie-n when the repeaterh lllL‘l.U Jahh-er llaclcup P1-ntectinn
`function operates at its lengeat perrnitted time as Ipecifi-ed. in 9.6.5.
`
`£423.? Link Integrity That Function Requirements in order to prctect