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Results 1 to 14 of 14
  1. #1
    Priceput in multe Teacher
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    Default Wireles la aproximativ 27km??

    Este posibil sa efectuez o legatura radio pe distanta asta?
    mentionez ca locatiile au vizibilitate directa
    daca este posibil va rog sa imi spuneti cu ce aparatura ,si care ar fi investitia


    Thanks in advance

    Decat sarac si bolnav mai bine bogat si sanatos

  2. #2
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    Default wierless 27Km

    Este posibil, pretul echipamentelor depinde de ce trafic vrei sa ai .
    Cu FHSS sub 400Kbps, DDSSH in 802.11b in jur de 1Mbps.
    In 802.11a cu Tsunami MP11a ajungi la mult mai mult probabil.
    Totul depinde de echipamente, antene si puterea maxima admisa in banda respectiva.
    Succes.

  3. #3
    Priceput in multe Teacher
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    Default

    sa spunem ca minimul de banda de care as avea nevoie ar fi de 1 mbps
    ai informatii cu ce aparatura si cam care ar fi pretul final total{antene ,ap, eventual amplificatoare}si de unde as putea procura cele necesare?
    am citit pe net ca sau realizat legaturi la 25 de km si functioneaza perfect
    cred ca 2-4 kilometri in plus nu sant un impediment asa de mare

    Decat sarac si bolnav mai bine bogat si sanatos

  4. #4
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    Default link

    Pentru distante de acest gen sunt echipamente speciale care au setari de ACK variabil(cel putin eu numai cu asa ceva am incercat). CISCO BR350, Symbol AP4121/4131 putere 100mW variabila (astea le stiu eu).
    Antene de 24dB. Varinata cu amplificator o exclud dar exista .
    Mai exista Proxim Tsunami Mp11a dar BSU este cam 1000$, SU pana in 500$.
    Mai exista si alte echipamente wierless in zona unde vrei sa faci linkul?

    Eu am avut Proxim RangeLan2 FHSS pe 24km si trageau cu 380kbps.
    Am scris de echipamente de firme cunoscute doar deoarece am avut si experiente cu echipamente din Taiwan/China care nu au fost concludente.

    Preturi gasesti pe net.

  5. #5
    Junior Member Teacher
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    Default

    Antena



    Quote Originally Posted by antena
    Frequency Range - 2400-2500MHz
    VSWR - 1.4
    Input Impedance - 50 ohm
    Gain - 27dBi
    Polarization - Horizontal or Vertical
    Beamwidth(3dB) - 7.5
    Front to Back Ratio - 38dB
    Max.Power - 100W
    Lightning Protect - DC Ground
    Connector Type - N-female
    Diameter - 1.2m
    Weight - 14kg
    Wind Loading AreaFront - 0.48m2 Side - 0.19m2
    Rated Wind Velocity - 210km/h
    Azimuth - 90
    Elevation - 12
    Price: 200EU + TVA

    Booster



    Quote Originally Posted by booster
    Operating Range 2400-2500MHz
    Operating Mode Bi-directional, half duplex, Time Division Duplex Senses RF carrier from Transmitter and automatically switches receive to transmit mode
    Transmit Gain 30dB (automatically adjusted)
    Frequency Response 1dB over operating range
    Output Power 1W (+31dBm) nominal; 500mW (+27 dBm) nominal
    TX Input Power (0dBm) minimum, up to (+20dBm) maximum
    Receiver Gain 15dB typical
    Noise Figure 3.5dB typical
    Connectors N-type, female, 50ohm
    Lightning Protection Direct DC ground at antenna connector
    DC surge protection at 6 VDC input from transmission cable
    Power Consumption 1A at 6 V DC 105-240V AC from power supply
    Dimensions Bi-directional amplifier: 4.92"L x 2.76"W x 1.02"H
    5V/1A DC injector: 3.14"L x 2.23"W x 1.02"H
    Operating Temperature Bi-directional amplifier: -20C to +70C
    5V DC injector: -30C to +70C
    Humidity Bi-directional amplifier: up to 100% Relative Humidity
    5V DC injector: 10% to 75% Relative Humidity
    Price= 215EU + TVA

    Acces Point
    *** la alegere ***

    More info la www.mondoplast.ro

    acuma sa scoata baietii berea de la rece ca le-am facut reclama
    1.5AL PrimeFocus, 0.6MTI, Kaon KSC570-2CI,SkyStar2 rev.2.3
    -----------------------------------------------

  6. #6
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    Default 27km

    Salut, verifica daca te incadrezi in puterea legala admisa in Romnia.
    Sunt programe pe net care fac astfel de calcule.
    Nu orice AP merge la 27Km chair daca ii pui 500mW intreaba inainte sa il cumperi.

  7. #7
    Junior Member Teacher
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    Default

    in romania ai voie sa folosesti fara o autorizare speciala puteri in 2.4Ghz pana la 100mW
    1.5AL PrimeFocus, 0.6MTI, Kaon KSC570-2CI,SkyStar2 rev.2.3
    -----------------------------------------------

  8. #8
    Junior Member Master
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    Default link la 27 de km?? hm..nici o problema

    am realizat cu manutza mea asa ceva..am mers chiar mai mult! aduc din state echipamente ffffff ieftine si foarte stabile ! merg pina la 45 km la 1 mega si pina la 25 la 2 mega. detalii la 033181603 numai dupa ora 23:30 ora romaniei

  9. #9
    Member Mentor
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    Default Re: link la 27 de km?? hm..nici o problema

    Quote Originally Posted by georgegsm
    am realizat cu manutza mea asa ceva..am mers chiar mai mult! aduc din state echipamente ffffff ieftine si foarte stabile ! merg pina la 45 km la 1 mega si pina la 25 la 2 mega. detalii la 033181603 numai dupa ora 23:30 ora romaniei
    Trimite-mi si mie te rog o oferta la [email protected]


    DM500S Offset Al 1.4m LNB Invacom 0.3dB + 1 X DIGI TV + 2 x DOLCE

  10. #10
    #/usr/sbin/remuser root Teacher
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    da-mi si mie te rog preturi la remuser @ gmail.com
    Am doar doua saituri (Jocuri Gratuite Online si Free flash games for girls and boys)
    -------------------------------------

  11. #11
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    Default

    o posibila legatura intre cele 2 puncte depinde de mai multi factori:
    -vizibilitate directa (asta implicit)
    - grad de ocupare a benzii de 2,4 GHZ in zona celor 2 puncte si pe traseu
    - tipul de echipament folosit (putere, stabilitate , etc.

    Miliwatii sunt necesari dar chiar ca nu ai ce face cu 500 mw sau 1 watt s-a speculat (eventual daca vrei sa prajesti tot spectrul radio de 2,4 Ghz din zona).

    Am realizat un link intre Cluj si Dej (cca. 40 km linie dreapta) si a mers la min 2 Mbps.

  12. #12
    Gold Member Expert
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    Default

    echipamentele WIMAX bat 50KM fara vizibilitate directa

  13. #13
    4x4 Expert
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    Default

    in banda de 2,54 Ghz este imposibil asa ceva.
    Te inseli amarnic.

  14. #14
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    Default

    E foarte adevarat ca pe tehnologia Wimax poti merge distante mari fara vizibilitate directa dar nu stiu daca chiar 50 km.
    Oricum problema se pune si de pret banuiesc .
    In schimb cu vizibilitate directa se poate merge pina peste 50km cu 2 cartele pcmcia (orinoco gold "testat de mine" sau legat la 2 mega la 53 km ) + 2 antene tip grid de 24 db (california amplifier sau ceva de genu ).
    Singura problema e inaltimea la care sunt puse .
    Timisoara, DM 500 HD + DM 500 , Ant 90cm.

 

 

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