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    參數(shù)資料
    型號: P3500EBRP1
    英文描述: SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR
    中文描述: SIDAC的| 400V五(公報)最大| 800mA的我(縣)|對92VAR
    文件頁數(shù): 54/161頁
    文件大?。?/td> 986K
    代理商: P3500EBRP1
    Digital Transmission Equipment
    SIDACtor
    Data Book
    3 - 14
    Teccor Electronics
    (972)580-7777
    Pair Gain Circuit Protection
    A digital pair gain system differs from an ISDN circuit in that ring detection, ring trip,
    ring forward, and off hook detection are carried within the 64 kbps bit stream for each
    channel rather than using a separate D channel. The pair gain system also uses loop
    powering from 10V up to 145V with a typical maximum current of 75mA.
    Protection Circuitry
    In Figure 3-14, longitudinal protection is required at the Central Office Terminal (COT)
    interface because of the ground connection used with loop powering. This is
    accomplished using two P1800SC SIDACtor
    s for over voltage protection and two
    F1250T TeleLink fuses (one on TIP, one on RING) for over current protection. For the
    U-interface side of the coupling transformer, additional over voltage protection is
    shown using the P0080SA SIDACtor.
    For the Customer Premises (CP) and the Remote Terminal (RT) interfaces where an earth
    ground connection is not utilized, only metallic protection is required. Figure 3-15 shows
    metallic protection being satisfied using a single P3100SC across TIP and RING and a
    single F1250T on either Tip or Ring.
    Component Selection
    The
    SC
    SIDACtor and F1250T TeleLink were chosen because both components
    meet GR 1089 surge immunity requirements without the use of additional series
    resistance. The voltage rating of the P1800SC was selected to ensure coordination
    with loop powering up to 150V. The voltage rating of the P3100SC was selected to
    ensure coordination with POTS ringing and battery voltages.
    Figure 3-13 Pair Gain Overview
    Switching
    System
    Line powered
    DSL 2-Wire,
    160 kbps
    2B1Q
    POTS
    Line 1
    Line 2
    MDF
    Central Office
    Terminal (COT)
    VF
    1
    VF
    2
    HF
    VF
    1
    VF
    2
    HF
    Remote
    Terminal
    Remote Terminal (RT)
    building or pedestal
    mounted
    POTS
    Customer
    Premises
    (CP)
    Central Office (CO)
    相關PDF資料
    PDF描述
    P3500EBRP2 SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR
    P3500EC SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR
    P3500ECRP1 SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR
    P3500ECRP2 SIDAC|400V V(BO) MAX|800MA I(S)|TO-92VAR
    P3500SARP SIDAC|400V V(BO) MAX|800MA I(S)|DO-214AA
    相關代理商/技術參數(shù)
    參數(shù)描述
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