1. Xaiv Gigabit lossis 100M?
Hauv kev sib txuas ntawm cov txheej txheem keb soj ntsuam video, ntau ntawm cov ntaub ntawv xov xwm txuas mus ntxiv yuav tsum tau xa mus, uas yuav tsum muaj lub pob txav kom muaj peev xwm xa cov ntaub ntawv stably. Cov koob yees duab ntau dua ntawm kev hloov chaw txuas nrog, cov nqi ntau dua ntawm cov ntaub ntawv ntws los ntawm hloov. Peb tuaj yeem xav qhov code code dej ntws tawm, thiab qhov hloov hluav taws xob yog dej txuag dej. Thaum cov dej ntws tawm mus los ntau dua qhov thauj khoom, lub pas dej tauv yuav tawg. Zoo sib xws, yog tias cov nyiaj ntawm cov ntaub ntawv xa mus los ntawm lub koob yees duab hauv qab tus tes hloov mus ntau dua lub peev xwm xa tawm ntawm qee qhov chaw nres nkoj, nws tseem yuav ua rau lub pob no muab pov tseg ntau cov ntaub ntawv thiab ua teeb meem.
Piv txwv li, 100M hloov mus rau sab sau ntawv cov ntawv ntim tau ntau dua 100M, uas yuav ua rau muaj ntau pob ntawm pob ntawv poob, uas ua rau lub vijtsam khov.
Yog li, muaj pes tsawg lub koob yees duab koj xav tau xaiv lub ntsuas gigabit?
Muaj tus qauv los saib tus nqi ntawm cov ntaub ntawv xa mus los ntawm lub koob yees duab' s uplink chaw nres nkoj: yog tias tus nqi ntawm cov ntaub ntawv xa mus los ntawm uplink chaw nres nkoj yog ntau dua 70M, xaiv qhov chaw nres nkoj gigabit, uas yog, xaiv qhov hloov gigabit lossis lub gigabit uplink hloov ua.
Ntawm no yog txoj kev ua lej ceev thiab xaiv txoj kev:
Tus nqi bandwidth=(sub kwj + lub kwj tseem ceeb) * tus naj npawb ntawm raws * 1.2
Bandwidth tus nqi> 70M, siv gigabit
AndBandwidth tus nqi ＜ 70M, siv 100M
Siv qhov piv txwv los ua piv txwv: muaj qhov hloov uas tau txuas nrog 20 H.264 200W koob yees duab (4 )1M), tom qab ntawd raws li qhov kev xam no, cov nqi xa mus ntawm chaw nres nkoj uplink yog (4+1) * 20 * 1.2 = 120M> 70M, qhov no, siv lub pob nyem gigabit. Hauv qee qhov xwm txheej, tsuas yog ib qho chaw nres nkoj ntawm lub pob hluav taws xob yuav tsum yog Gigabit, tab sis yog tias cov qauv system tsis tuaj yeem ua kom zoo dua qub thiab cov dej ntws sib npaug, ces yuav tsum tau hloov Gigabit lossis qhov hloov Gigabit uplink.
Nqe Lus Nug 1: Cov txheej txheem kwj ntawm cov kwj xam cov ntsiab lus tau meej heev, tab sis vim li cas nws yuav tsum tshaj tawm 1.2?
Vim tias raws li lub hauv paus ntsiab lus ntawm kev sib txuas lus hauv network, qhov encapsulation ntawm cov ntaub ntawv pob kuj ua raws TCP / IP raws tu qauv, thiab cov ntaub ntawv feem yuav tsum khij nrog cov kab hauv cov ntawv txheej ntawm txhua txheej txheej txheem kom kis tau zoo, yog li cov header tseem yuav nyob ib qho qee qhov feem ntawm nyiaj siv ua haujlwm.
Tus lej 4M ntsis thiab 2M ntsis tus nqi ntawm lub koob yees duab peb feem ntau hais txog yog qhov loj me ntawm cov ntaub ntawv ntu. Raws li cov ntaub ntawv sib txuas lus sib piv, lub taub hau siv nyiaj ntau npaum li ntawm 20%, yog li cov mis yuav tsum tau khoo ntawm 1.2.
Cov ntaub ntawv header tso nyiaj rau kwv yees li 20% ntawm nyiaj siv ua haujlwm
Nqe Lus Nug 2: Vim li cas 70M tsis yog 100M?
Mas xam rau qhov tawg khiav. Cov ntaub ntawv yees duab ntws yog tsim ntawm ntau cov thav ntawv. Tus kwj deg zoo nkauj cov ntaub ntawv yeej muaj ntau ntau cov nrawm tawg ntawm cov ntaub ntawv. Hauv qhov no, tus tes hloov yuav tsum muaj rab peev xwm thiab txhim kho qhov kev hloov ntawm cov ntaub ntawv.
Hloov chaw muag khoom-rau-mus tom khw-nraim cov ntaub ntawv no, yog li nws tau pom zoo kom tseg qee qhov nyiaj. Thaum tsim kev hloov ua lub network, tuaj yeem muaj 30% -40% kev tshwj tseg. Rau 100M chaw nres nkoj, nws pom zoo tias cov kev xa tuaj tom ntej tsis pub tshaj 70M.
Cov Koob Yees Duab feem ntau siv hauv engineering feem ntau muaj ob qho nqi: H.264 thiab H.265. Raws li tus nqi no:
Peb siv H.264 200W lub koob yees duab (lub ntsiab thiab sub kwj tau suav tias yog 4+M), kev siv bandwidth thiab hloov kev xaiv nyob rau hauv cov kab ke network:
Lub hnub qub network qauv yog raws li nram no:
2. Yuav ua li cas xaiv lub hau hloov?
Loj loj thiab nruab nrab keb soj ntsuam network feem ntau yog tsim los raws li 3-theem qauv ntawm nkag-sib zog-tub ntxhais. Lub hauv paus hloov pauv yog cov ntaub ntawv xa mus rau lub nruab nrab ntawm tag nrho cov network thiab nqa cov neeg coob ntawm cov ntaub ntawv ntws. Yog li ntawd, nws yuav tsum ua kom ntseeg tau tias tsis muaj qhov tsis zoo hauv kev xa mus ntawm txhua qhov chaw nres nkoj ntawm cov khoom siv sib hloov.
Qee tus neeg muaj qee qhov tsis to taub txog ntawm qhov xaiv ntawm lub pob hluav taws xob. Piv txwv li, yog tias 200 lossis 500 lub koob yees duab, yog xam raws li tus txheej txheem ntawm 500 * 5M=2500M, qhov tshwm sim tau dhau deb tshaj li tus nqi xa mus ntawm gigabit chaw nres nkoj. Hom phiaj xwm no yuav tsum siv thaj tsam 10G hloov mus?
Tsis tsim nyog. Qhov tseeb, hauv kev sib koom tes loj hauv lub network, kev thauj mus los yuav tsis nyob ntawm ib qho chaw nres nkoj, tab sis yuav muab faib rau ntau lub chaw nres nkoj thiab xa mus los ntawm ntau lub gigabit ports.
Raws li qhia hauv qab no:
Nws tuaj yeem pom tias txhua qhov chaw nres nkoj hauv daim duab tsis tshaj li 1000M, thiab txhua qhov chaw nres nkoj Gigabit ntawm qhov hloov Gigabit tag nrho tuaj yeem ua tiav 1000M bidirectional kis, thiab tag nrho throughput (tag nrho load) feem ntau tsawg dua lossis sib luag ntawm lub backplane ntawm hloov bandwidth.
Yog li no, thaum xaiv qhov tseem ceeb hloov chaw, raws li tus lej ntawm IPCs, cov lus pom zoo yog li hauv qab no:
①100 ~ 200 poob lawm, pom zoo Gigabit tswj kev hloov
②200 ~ 500 poob lawm, peb-txheej tswj kev hloov pauv kev pom zoo
Tam sim no, theem thib ob thiab qib peb tau tswj hwm tag nrho Gigabit hloov khoom siv tau haum rau qhov tseem ceeb ntawm kev sib pauv xov tooj xyuas thiab ua qhov loj-muaj peev xwm cov ntaub ntawv pauv. Tsim ntau yam tes hauj lwm.
Rau qhov loj lossis loj heev (300 ~ 1000) kev soj ntsuam xyuas cov tes hauj lwm, koj yuav tsum siv lub pob hluav taws xob 3-txheej los faib cov ntu ntu network, thiab nws raug nquahu kom siv txoj kev hloov peb-txheej. Ntawm no yog lub network daws teeb meem rau 100, 300, thiab 500 ntsiab lus.
Cov txheej txheem sib txuas ntawm 100 IPCs
Txog ntawm 100 lub ntsiab lus, tus qauv tsim tsom mus rau qhov tsis-thaiv cov hlau txuas mus ntxiv.
Tus txheej txheem sib txuas ntawm 300 IPCs
Txog 300 cov ntsiab lus, tus qauv tsim tsom mus rau ntau ntu kev sib koom tes thiab kev xa mus tom ntej.
Cov txheej txheem sib txuas ntawm 500 IPCs
500-point nplai yuav tsum rov tsim dua tshiab, uas yog qhov tsim nyog rau cov chaw nres tsheb loj xws li tsoomfwv thiab chaw ua haujlwm.
3. Li cas xaiv cov PoE hloov?
PoE yog lub thev naus laus zis rau kev xa hluav taws xob thiab cov ntaub ntawv xa mus los ntawm lub network cable. Tsuas yog ib qho cable cable txuas tau rau hauv PoE lub koob yees duab taw tes tsis muaj xov hluav taws xob ntxiv.
Dab tsi yog qhov txiav txim siab thaum xaiv PoE hloov?
01 ib qho chaw nres nkoj fais fab
Txawm hais tias lub zog ntawm ib qho chaw nres nkoj tuaj yeem ua tiav lub zog siab tshaj plaws ntawm txhua IPC txuas nrog lub pob hluav taws xob, ntawd yog, qhov tshwj xeeb ntawm hloov tau xaiv raws li lub zog siab tshaj plaws ntawm IPC.
Lub zog ntawm PoE IPC lub zog tsis tshaj 10W, yog li tus hloov tsuas xav tau kev txhawb nqa 802.3af. Txawm li cas los xij, qhov yuav tsum tau ua lub zog ntawm qee lub koob yees duab dome siab siab yog txog 20W, lossis lub zog ntawm qee lub wireless nkag APs yuav siab dua, yog li tus hloov yuav tsum tau txhawb 802.3at.
Hauv qab no yog tso zis hluav taws xob sib nug rau ob thev naus laus zis:
02 Lub zog hluav taws xob ntau ntawm tag nrho cov tshuab
Tshaj tawm tias qhov ntau tshaj qhov tau txais hluav taws xob ntawm tag nrho lub tshuab ua tau raws li qhov yuav tsum tau ua, thiab lub zog ntawm txhua IPCs yuav tsum tau muab coj los xav thaum tsim. Cov peev txheej siab tshaj plaws ntawm lub pob hluav taws xob yuav tsum muaj ntau tshaj qhov suav ntawm lub zog ntawm txhua IPCs.
03 Lub fais fab mov hom
Kev siv yim-tshooj network cable rau kev xa khoom tsis tas yuav tsum xav txog.
Yog tias nws yog plaub-ntu network cable, koj yuav tsum paub tseeb tias qhov hloov puas txhawb Chav Kawm A fais fab.
Thaum xaiv, koj tuaj yeem xaiv raws li qhov zoo thiab cov nqi txiav txim siab ntawm ntau yam PoE:
04 Li cas los xaiv lub fiber ntau qhov txuas?
Hauv kev saib xyuas ntawm cov chaw taws teeb, cov kab hluav taws xob fiber ntau thiab cov kis las fiber ntau tau siv ntau. Hauv qhov ua piv txwv hauv qab no, nws muaj ntau cov khoom siv kho qhov muag fiber ntau tau hloov kho cov khoom siv hauv network, xws li transceivers, hloov chaw, hloov kho, thiab lwm yam.
Cov chaw hloov kho cov khoos phis tawm, kev sib txuas ntawm cov hlua hluav taws xob, thiab cov khoos phis tawm tau siv nrog kev sib txuam. Thaum xaiv, them sai sai rau kev siv lawv ua khub, thiab nco ntsoov tias AB xaus qhov sib tw.
Qhov A / B xaus yog ob xaus ntawm qhov kho qhov muag kis tau tus mob. Tsis hais txog qhov hloov, tus qauv hloov kho lossis optical transceiver tau xaiv ntawm ob hnub, ob qhov kawg yuav tsum yog A thiab B feem ua ntej lawv tuaj yeem ua khub (cov qauv khoom raug cim A lossis B).
Ua haujlwm nthwv hluav taws xob ntawm A-sab ntaus ntawv yog 1310nm (RX) thiab 1550nm (TX), thiab nws yuav tsum siv nrog B-sab fiber optic transceiver (RX1550nm, TX1310nm).
Thaum kawg, nws tseem yuav tsum xav txog qhov chaw nres nkoj nrawm, hom fiber ntau, dual fiber ntau lossis fiber ntau.
