Layer na zahiri yana ƙasan ƙirar OSI, kuma babban aikinsa shine amfani da matsakaicin watsawa ta jiki don samar da haɗin jiki don layin haɗin bayanan don watsa rafukan bit. Layer na zahiri yana bayyana yadda kebul ɗin ke haɗa da katin cibiyar sadarwa, da abin da fasahar watsawa ke buƙatar amfani da shi don aika bayanai akan kebul ɗin, kuma yana bayyana hanyar samun damar saman Layer (data link Layer).
Yawancin lokaci, na'urorin da ke da wasu damar sarrafa bayanai da aikawa da karɓa ana kiran su da kayan aiki na bayanai (DTE), kuma kayan da ke tsakanin DTE da na'ura mai watsawa ana kiransa Data circuit terminating equipment (DCE). DCE tana ba da jujjuya sigina da ayyukan ɓoyewa tsakanin DTE da matsakaicin watsawa, kuma yana da alhakin kafa, kiyayewa da sakin haɗin jiki. Domin DCE tana tsakanin DTE da hanyar sadarwa, yayin aikin sadarwa, DCE tana watsa bayanan DTE zuwa cibiyar watsa bayanai a gefe guda, kuma a daya bangaren, tana buƙatar watsa bit stream da aka karɓa daga matsakaicin watsawa zuwa DTE a jere. , DCE yana buƙatar watsa bayanan bayanai da bayanan sarrafawa, kuma yana buƙatar yin aiki a cikin babban matsayi na daidaitawa, don haka ya zama dole don tsara ƙa'idodin ƙa'idodin DTE da DCE, waɗannan ka'idoji sune ƙa'idodin ƙirar jiki.
Kuma wannan ma'aunin yana bayyana halaye huɗu na Layer na zahiri:
1. Mechanical halaye: Ƙayyade halaye na haɗin jiki, ƙayyade ƙayyadaddun ƙayyadaddun bayanai, siffar dubawa, adadin jagora, lamba da tsari na fil da aka yi amfani da su a cikin haɗin jiki, da dai sauransu.
2. Lantarki Halayen: Lokacin da aka ƙayyade watsawar raƙuman binaryar, ƙimar ƙarfin lantarki, daidaitawar impedance, ƙimar watsawa da iyakar nisa na sigina akan layi, da dai sauransu.
3. Halayen aiki: suna nuna abin da ma'anar wani mataki akan wani layi yake nufi, da kuma manufar layin siginar wanda ba'a iya gani.
4. Halayen tsari (halayen tsari): ayyana hanyoyin aiki da alaƙar lokaci na kowane da'irar jiki
Abin da ke sama shi ne bayanin ilimin "OSI-Physical Layer Characteristics" wanda Shenzhen HDV photoelectric Technology Co., Ltd ya kawo. Kayayyakin sadarwa da kamfanin ke samarwa:
Rukunin Module: na gani fiber modules, Ethernet modules, na gani fiber transceiver modules, na gani fiber damar kayayyaki, SSFP Optical modules, kumaSFP Optical fibers, da dai sauransu.
ONUcategory: EPON ONU, AC ONU, fiber optic ONU, CATV ONU, GPON ONU, XPON ONU, da dai sauransu.
OLTaji: Farashin OLT, Farashin GPON OLT, Farashin EPON OLT, sadarwaOLT, da dai sauransu.
Samfuran samfurin na sama na iya ba da goyan baya ga yanayin cibiyar sadarwa daban-daban. Ƙwararrun R & D mai ƙwararru da ƙarfi na iya taimaka wa abokan ciniki tare da al'amurran fasaha, kuma ƙungiyar kasuwanci mai tunani da ƙwararrun za su iya taimaka wa abokan ciniki su sami ayyuka masu inganci yayin shawarwarin da suka gabata da aikin samarwa. Barka da zuwa tuntube mudominkowane irin tambaya.
