SFP & SFP + MSA: Dab tsi Specs txhais, Cov neeg muag khoom kaw dab tsi

Txhua zaus koj ntsaws lub transceiver rau hauv ib qho kev hloov ua los ntawm cov chaw tsim khoom sib txawv thiab qhov txuas tuaj yeem huv, Multi-Qhov Kev Pom Zoo tau ua tiav. SFP MSA thiab SFP + MSA yog ob ntawm cov ntaub ntawv tseem ceeb tshaj plaws hauv kev sib tham kho qhov muag - tab sis feem ntau cov engineers uas nyob ntawm lawv txhua hnub tsis tau nyeem ib qho. Cov ntawv cog lus no tsis yog cov ntawv sau lag luam. Lawv yog cov kev qhia meej meej uas txhais tau hais tias yuav ua li cas lub pluggable transceiver yuav tsum tau ua kom nws ua haujlwm hauv txhua qhov chaw nres nkoj host, los ntawm ib tus neeg muag khoom, tsis muaj kev sib tham lossis kev kwv yees.

 

 

MSA vs. Cov Qauv Cai: Ib qho tseem ceeb sib txawv

Ib Daim Ntawv Pom Zoo Ntau Yam -Qhov Kev Pom Zoo yog qhov kev lees paub ntawm kev yeem ua ke sau los ntawm cov tuam txhab sib tw. Nws tsis tau pom zoo los ntawm ib lub koom haum ua haujlwm. IEEE 802.3 txhais tau li cas Ethernet thav duab raug encoded thiab xa mus thoob lub cev nruab nrab. ITU-T G.694.1 txhais qhov sib nrug ntawm DWDM channel. SFP MSA txhais tsis muaj qhov ntawd. Nws txhais li cas yog lub transceiver module nws tus kheej - nws lub cev qhov ntev, 20-pin hluav taws xob connector layout, fais fab mov yuav tsum tau, teeb liab assignments, thiab kev tswj interface siv rau kev txheeb xyuas thiab kuaj.

Qhov kev sib cais ntawm kev txhawj xeeb no yog qhov ua rau lub cev ua haujlwm. IEEE qhia kev lag luam tias lub teeb liab yuav tsum zoo li cas. MSA qhia rau kev lag luam tias lub thawv nqa lub teeb liab yuav tsum zoo li cas. Ntev npaum li ob tog ua raws, 1000BASE-LX module los ntawm lub Hoobkas hauv Shenzhen yuav coj tus cwj pwm zoo ib yam los ntawm ib qho chaw hauv Texas thaum muab tso rau hauv tib qhov chaw hloov chaw. Qhov kev hloov pauv ntawd yog qhov hloov pauvoptical transceiverslos ntawm tus neeg muag khoom- kaw cov khoom siv rau hauv kev sib tw cov khoom lag luam.

 

 

Yuav ua li cas SFP Hloov GBIC - thiab Vim Li Cas Nws Tseem Ceeb rau Kev Nkag Siab MSAs

Ua ntej SFP muaj nyob, GBIC (Gigabit Interface Converter) yog tus qauv kub -pluggable transceiver daim ntawv foos, tswj hwm los ntawm nws tus kheej MSA specification SFF-8053, thawj zaug luam tawm xyoo 1995. GBICs ua haujlwm, tab sis lawv lub cev loj - kwv yees li ob zaug ntawm qhov chaw sib txuas ntawm SCFP. Ib tug raug Catalyst 6500 kab daim npav tuaj yeem ua raws li tej zaum 16 GBIC chaw nres nkoj. Kev ua lej yog qhov yooj yim thiab ua phem: raws li kev sib koom ua ke, tsis muaj txoj hauv kev xa 48 Gigabit fiber ntau ports rau ib kab ntawv hauv daim ntawv GBIC.

SFP MSA, sau tseg ua INF-8074i thiab luam tawm thaum lub Tsib Hlis 12, 2001, yog kev lag luam cov lus teb ncaj qha rau qhov teeb meem ceev. Kaum tsib lub tuam txhab tau kos npe rau thawj daim ntawv cog lus, suav nrog Finisar, IBM, Agilent Technologies, Molex, Lucent Technologies, Picolight, thiab Infineon Technologies. Cov lus qhia tshwj xeeb txo qis qhov module mus rau kwv yees li ib nrab ntawm GBIC lub ntim, hloov ntawm SC mus rau LC connectors, thiab siv 20-pad edge connector es tsis txhob GBIC tus pin-based interface. Tam sim ntawd, 48-chaw nres nkoj SFP kab ntawv tsis yog ua tau xwb - lawv tau dhau los ua qauv.

Dab tsi ua rau qhov keeb kwm cuam tshuam niaj hnub no yog tus qauv uas nws tau tsim. Txhua tiam tom ntej transceiver - SFP+, SFP28, QSFP+, QSFP28, QSFP-DD - ua raws li tib MSA- cov txheej txheem tsav: cov neeg tsim khoom sib tw zaum, pom zoo rau kev sib koom ntawm lub cev thiab hluav taws xob specifications, tshaj tawm cov ntaub ntawv, thiab cia lub khw sib tw ntawm cov khoom zoo, nqi, thiab kev txhawb nqa. Qhov tshwm sim yog aKev nce qib ntawm hom transceiver hla 1G txog 400G, txhua tus tswj hwm los ntawm tib lub moj khaum no.

 

 

Sab hauv INF-8074i: Dab tsi SFP MSA Qhia tseeb

INF-8074i npog plaub thaj chaw loj. Ua ntej, txhua qhov loj me: txhua MSA- ua raws SFP module yuav tsum haum rau hauv tib lub hnab ntawv thiab cov phooj ywg nrog tib lub tawb thiab qhov sib txuas. Thib ob, lub tshuab hluav taws xob sib txuas: 20-pin edge connector txhais cov kis thiab tau txais cov ntaub ntawv sib txawv, cov khoom siv hluav taws xob (VccT rau transmitter, VccR rau receiver), kev sib txuas hauv av, kev xa tawm -fault output, transmit{8}}disable input, peb module-definition pins 2/14} (Mod) thiab I2C serial interface, thiab tus nqi-xaiv tus pin rau kev ua haujlwm dual-tus nqi.

Thib peb, EEPROM nco daim ntawv qhia: ib 256-byte thaiv ntawm I2C chaw nyob 0xA0 khaws cov module tus kheej - cov chaw tsim khoom npe, ntu naj npawb, serial tooj, txhawb cov ntaub ntawv tus nqi, wavelength, link length ratings, thiab connector type. Qhov no yog cov ntaub ntawv uas koj hloov tau nyeem nyob rau hauv milliseconds ntawm module insertion. Plaub, cov lus qhia tshwj xeeb muab kev pom zoo rau lub rooj tsavxwm layouts, bezel designs, thiab insertion/extraction force limits kom ntseeg tau tias kev ua haujlwm zoo ib yam. Kev nkag siab txog qhov MSA ua thiab tsis lees paub yog qhov tseem ceeb rau kev nkag siabYuav ua li cas transceiver modules ua tauhauv koj cov khoom siv network.

 

 

SFP + thiab CDR Kev Txiav Txim Uas Tua XFP

Thaum 10 Gigabit Ethernet tuaj txog, kev lag luam pib ua qauv ntawm XFP daim ntawv foos (sau hauv INF-8077i). XFP modules lub cev loj dua SFPs vim tias lawv muaj lub moos thiab cov ntaub ntawv rov qab (CDR) circuitry nyob rau hauv lub module nws tus kheej, nrog rau tag nrho cov hluav taws xob dispersion them (EDC) cav. Qhov no ua rau XFP modules ntau dua, muaj zog dua tshaib plab, thiab kim dua.

Lub SFP+ MSA, raug cai SFF-8431, tau coj txoj hauv kev sib txawv. Nws txav CDR thiab teeb liab txias los ntawm lub module mus rau tus tswv system SerDes (serializer/deserializer). Qhov no txhais tau tias SFP + module nws tus kheej tau yooj yim dua - qhov tseem ceeb yog laser, photodetector, thiab cov tsav tsheb hluav taws xob tsawg tsawg - thaum khaws cia tib lub tshuab ua kom zoo li qub SFP. Kev lag luam tawm yog tias tus tswv tsev hloov tsim xav tau SerDes muaj peev xwm ntau dua, tab sis ASIC cov neeg muag khoom twb tau tsiv mus rau qhov kev taw qhia ntawd.

Qhov tshwm sim yog txiav txim siab. SFP + modules tau me dua, pheej yig dua, thiab siv zog tsawg dua XFP. Chaw nres nkoj ceev ob npaug los yog tripled ntawm tib lub faceplate. XFP tau ploj mus los ntawm kev ua lag luam hauv ob peb xyoos. Tib yam CDR- ntawm - tus tswv tsev architecture coj mus rau hauvhnub no 10GBASE SFP + moduleshla txhua qhov sib txawv - SR, LR, ER, ZR - thiab teeb tsa tus qauv rau 25G thiab 100G tsim. SFF-8431 specification, ntawm kev hloov kho 4.1 txij thaum Lub Xya Hli 2009, tseem yog cov ntaub ntawv tswj hwm rau 10G SFP + rau hnub no.

 

 

Digital Diagnostics thiab SFF-8472 Specification

Ob qho SFP thiab SFP + modules feem ntau siv Digital Diagnostics Monitoring (DDM) raws li tau hais tseg hauv SFF-8472, tam sim no tswj hwm los ntawm SNIA SFF Technical Work Group. DDM nthuav tawm tsib lub sijhawm tiag tiag - lub sijhawm tsis dhau los ntawm I2C kev tswj hwm kev sib txuas: xa hluav taws xob kho qhov muag, tau txais lub zog kho qhov muag, laser bias tam sim no, qhov ntsuas kub, thiab cov khoom siv hluav taws xob. Cov txiaj ntsig no tau khaws cia ntawm I2C chaw nyob 0xA2 thiab tuaj yeem nyeem los ntawm tus tswv tsev rau kev saib xyuas SNMP.

Laser bias tam sim no trending tsim nyog tshwj xeeb mloog. Lub laser diode uas yuav tsum tau ua kom tsis tu ncua kev tsis ncaj ncees tam sim no kom tswj tau cov zis hluav taws xob ruaj khov yog mus txog qhov kawg - ntawm - lub neej. Kev ntes cov qauv no los ntawm DDM cov ntaub ntawv cia cov pab pawg ua haujlwm teem sijhawm hloov pauv hloov kho qhov teeb meem tsis tau piav qhia qhov txuas flaps ntawm 3 AM. Qhov kev kuaj mob muaj peev xwm sib npaug sib npaug txawm tias koj tab tom khiav10G tooj liab SFP + modules hauv ib qho chaw sib xyaw- xov xwm tsev kawm ntawvlos yog ib qho - hom fiber ntau hla lub nplhaib metro. Qhov tseeb SFF-8472 hloov kho (12.5, luam tawm 2025) ntxiv nplooj ntawv nthuav dav-xaiv kev txhawb nqa thiab cov lej hloov pauv tshiab, uas cuam tshuam txog cov kev hloov pauv tsis tu ncua txawm tias muaj cov qauv tsim nyog.

 

 

Tus neeg muag khoom xauv-Nyob rau hauv: Yuav ua li cas EEPROM Coding Tiag tiag ua haujlwm

SFP MSA tawm qee qhov EEPROM byte ntau yam uas tau xaiv los ua "tus neeg muag khoom tshwj xeeb" - tshwj xeeb bytes 96 txog 127 ntawm qhov chaw nyob 0xA0. Qee cov tuam txhab tsim khoom siv cov khoom siv tsis tau teev tseg los ntawm kev sau cov cim qhia tus kheej rau hauv lawv cov khoom lag luam. Thaum ib qho module raug tso, qhov hloov firmware nyeem cov bytes no thiab muab piv rau tus nqi xav tau. Yog tias cov cai tsis sib xws, qhov chaw nres nkoj cuam tshuam "tsis muaj kev txhawb nqa transceiver" ceeb toom lossis tsis kam qhib tag nrho.

Qhov kev txwv no tsis yog MSA qhov yuav tsum tau ua - nws yog firmware- theem txoj cai tswj hwm los ntawm tus tswv tsev muag khoom nyob rau saum tus qauv. Qhov thib peb tsis lees paub-party module tseem ua tau raws li txhua yam khoom siv, hluav taws xob, thiab kho qhov muag hauv INF-8074i lossis SFF-8431. Thib peb- cov neeg muab khoom lag luam tawm tsam qhov no los ntawm kev tsim cov cai tshwj xeeb rau cov neeg muag khoom hauv lawv cov qauv 'EEPROMs. Ntawm Cisco IOS platforms, cov thawj coj kuj tseem tuaj yeem hla daim tshev nrog cov kev pabcuam uas tsis muaj kev txhawb nqa-transceiver cov lus txib, txawm tias Cisco TAC yuav tsis txhawb qhov kev teeb tsa no. Qhov coding dynamic no yog ib qho tseem ceeb tshaj plaws hloov pauv thaumntsuam xyuas qhov transceiver ua haujlwm nyob rau hauv ib tug muab hloov platform.

 

 

Dab tsi tshwm sim rau Thawj 15 Tus Neeg Sau Npe

Taug qab txoj hmoo ntawm tus thawj INF-8074i cov neeg kos npe qhia cov dab neeg dav dav ntawm kev lag luam kho qhov muag sib sau ua ke. Finisar tau txais los ntawm II-VI hauv xyoo 2019, uas tom qab ntawd rebranded li Coherent Corp. Agilent spun tawm nws cov semiconductor kev ua haujlwm rau hauv Avago Technologies, uas tau koom nrog Broadcom. Lucent Technologies tau koom ua ke nrog Alcatel thiab tom qab ntawd absorbed rau hauv Nokia. Infineon muag nws lub tsev fiber ntau optics. Picolight tau txais los ntawm JDSU (tam sim no Viavi Solutions). Ntawm kaum tsib tus thawj kos npe, feem ntau tsis muaj nyob rau hauv cov koom haum ywj pheej - tsis tau qhov tshwj xeeb uas lawv tau sau tseg tseem tswj hwm ntau lab tus qauv xa tawm txhua xyoo.

Qhov no yog arguably tus qauv MSA lub zog loj tshaj plaws. Daim ntawv cog lus outlives cov tuam txhab uas tsim nws. Vim tias qhov kev qhia tshwj xeeb yog pej xeem thiab kev siv tau qhib, txhua lub chaw tsim khoom tuaj yeem tsim cov qauv ua raws yam tsis muaj cov nqi ntawv tso cai lossis kev muaj tswv yim. Qhov qhib tib yam yog vim li cas MSA lub moj khaum scaled seamlessly los ntawm 1G SFP txhua txoj kev mus rau400G QSFP-DD modules tsim rau hyperscale cov chaw zov me nyuam- thiab yog vim li caspluggable transceivers tseem yog tus qauv tseem ceeb ntawm kev sib txuasthoob plaws kev lag luam, telecom, thiab huab infrastructure zoo ib yam.