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Toshiba Strata Xii, Strata Xx General Description Manual

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    							1) Lock in the SET switch on the MCAU: 
    * The MCAU LED and MW/FL LED on 
    station 17 will go on. 
    2) Depress IFJ key on station 17: 
    l SPKR LED will light steadily. 
    3) Dial m 4 m on dial pad: 
    l SPKR LED will flash continuously. 
    4) Depress the following keys: 
    l II (1 m -1 -the correspond- 
    ing LEDs will light. 
    5) Depress the [I key: 
    l All station 17 LEDs (except MW/FL) 
    will go off. 
    6) Release the SET switch on the MCAU: 
    l The MCAU LED and MW/FL LED on 
    station 17 will go off. 
    10.14 To clear second optional Automatic 
    Dialing memory (CRDU on MDSU): 
    1) Lock in the SET switch on the MCAU: 
    l The MCAU LED and MW/FL LED on 
    station 17 will go on. 
    2) Depress El key on station 17: 
    l SPKR LED will light steadily. 
    3) Dial 
    q g q on dial pad: 
    l SPKR LED will flash continuously. 
    4) Depress the following keys: 
    l )I 1ZG-l /ZiZ’j fi] -thecorrespond- 
    ing LEDs will light. 
    5) Depress the i key: 
    l All station 17 LEDs (except MW/FL) 
    will go off. 
    6) Release the SET switch on the MCAU: 
    l The MCAU LED and MW/FL LED on 
    station 17 will go off. 
    10.15 
    To clear third optional Automatic 
    Dialing memory (CRDU on MCBU #2): 
    1) Lock in the SET switch on the MCAU: 
    l The MCAU LED and MW/FL LED on 
    station 17 will go on. SECTION 100-020-200 
    JUNE 1983 
    2) 
    Depress Ii key on station-17: 
    l SPKR LED will light steadily. 
    3) 
    Dial [T;I % B on dial pad: 
    l SPKR LED will flash continuously.- 
    4) Depress the following keys: 
    l ) ) ) Ico15j -the correspond- 
    ing LEDs will light. 
    5) 
    Depress the [=I key: 
    l All station 17 LEDs (Except MW/FL) 
    will go off. 
    6) 
    Release the SET switch on the MCAU: 
    l The MCAU LED and MW/FL LED on 
    station 17 will go off. 
    10.20 
    SMDR Real Time Clock Adjustment 
    10.21 
    One of the functions of the MSMU PCB 
    is to provide a calendar and clock for showing 
    time, date and duration of recorded calls. This 
    clock and calendar must be set when the system 
    is first placed into service. 
    * 10.22 
    The MSMU is equipped with a-battery’ 
    to protect the clock and calendar settings in event 
    of a power failure. Ensure that the MSMU battery 
    strap is in the ON position per paragraph 07.20. 
    10.23 
    The MSMU will automatically adjust 
    for 30- and 28-day months and leap year. 
    1024 
    The MSMU faceplate is equipped with 
    three switches and two LED displays (Figure 40). 
    Looking from top to bottom; the functions of the 
    switches are as follows: 
    STR 
    : Writes data into memory once it is properly 
    displayed. 
    MOD: Selects items to be adjusted. Multiple 
    depressions of the MOD switch will cause 
    item numbers to be displayed sequentially 
    by LED #l. The possible displays are: 
    Off 
    1 = year 
    2 = month 
    3 = day 
    4 = hour 
    5 = minute 
    6 = start 
    -27-  
    						
    							INSTALLATION 
    SECTION 100-020-200 
    JUNE 1983 
    INC: Selects the data (hour, minute, day, etc.) 
    for the item number selected by the MOD 
    switch and displayed by LED #l. LED #2 
    displays data selected by the INC switch. 
    i Depressing the INC switch once 
    increments data by 1. 
    l Depressing and holding the INC switch 
    causes data to increase continuously 
    until the INC switch is released. 
    :i 
    -I: Y! MSMU 
    : -7 .1 
    I 
    t. -, 
    FIGURE 40-MSMU FACEPLATE 
    10.25 To set clock and calendar: 
    1) Verify that the battery is connected on the 
    MSMU (Figure 17). 
    2) Depress the MOD switch once. 
    l LED #l will display 1 (year) 
    l LED #2 will display current data 
    3) Use the INC switch to correct data in LED 
    #2 display. 
    4) Depress the MOD switch once. 
    l LED #l will display 2 (month) 
    l LED #2 will display current data 
    5) Use the INC switch to correct data in LED 
    #2 display. 
    6) Depress the MOD switch once. 
    l LED #1 will display 3 (day) 
    l LED #2 will display current data 7) 
    8) 
    9) 
    10) 
    11) 
    12) 
    13) Use the INC switch to correct data in LED 
    #2 display. 
    Depress the MOD switch once. 
    l LED #l will display 4 (hour) . 
    l LED #2 will display current data 
    Use the INC switch to correct data in LED 
    #2 display. 
    Depress the MOD switch once. 
    l LED #l will display 5 (minute) 
    l LED #2 will display current data 
    Use the INC switch to correct data in LED 
    #2 display. 
    Depress the MOD switch once. 
    l LED #l will display 6 (start) 
    & LED #2 has no display 
    Slide 
    STR switch to ON and then back to 
    OFF. 
    l LEDs will go off 
    l Data is transferred to working memory and 
    time keeping starts. 
    NOTE: 
    If LED #I is changed to OFF before STR 
    is operated, existing data will not be changed 
    regardless of adjustments made in previous 
    steps. 
    10.30 
    Program Listing 
    10.31 The MSMU has the capability to retrieve 
    current customer data from memory and output 
    it to the SMDR printer. 
    10.32 See Section 100-020-300, Programming, 
    for printout method and format. 
    11 SYSTEM TEST PROCEDURES 
    11.00 E KT Functional Check 
    11.01 In order to verify basic system functions, 
    and confirm the proper functioning of the EKT 
    itself, perform the following test procedure at each 
    station beginning with station 10. 
    11.02 With handset on-hook: 
    a) Depress the I key: 
    . INT LED: 
    l-use flash 
    ? 
    -28-  
    						
    							b) 
    4 
    d) 
    4 
    f) 
    l SPKR LED: on steady 
    l Listen for intercom dial tone via EKT 
    speaker 
    Adjust speaker volume with the volume control 
    on the rear right side of the EKT. 
    Depress the [cl] key: 
    . CO 1 LED: l-use flash 
    .SPKR LED: on steadv 
    l Listen for CO/PBX d*ial tone via EKT 
    speaker 
    Dial any digit (2~9) on the dial pad and 
    dial tone will stop. 
    Depress the m key: 
    l Listen for circuit break followed by dial 
    tone after approximately 2 seconds. 
    Depress each a key in order on every EKT, 
    the following should occur: 
    l CO LED: l-use flash 
    .SPKR LED: on steady 
    l Listen for CO/PBX dial tone via EKT 
    speaker 
    NOTE: 
    If no CO/PBX facility is connected to a 
    CO key, dial tone will not be heard but the 
    LED is still functional. 
    g) Depress the m key: 
    l SPKR LED: off 
    l E KT speaker: off 
    h) Depress the m 
    .DND LED: key: 
    on 
    i) Depress the m 
    . DND LED: key: 
    Off 
    j) Depress the m key: 
    . CO 1 LED: l-use flash 
    .SPKR LED: on 
    l Listen for CO/PBX dial tone via EKT 
    speaker 
    k) Depress the m key: 
    . CO 1 LED: l-hold flash 
    l Speaker: off (no dial tone) 
    .SPKR LED: off 
    I) Depress the m key: 
    *CO 1 LED: l-use flash 
    n) 
    0) 
    PI 
    4) 
    r) 
    s) 
    t) 
    u) 
    v) 
    WI 
    x) 
    -29- 
    II”(i) 4J-%LLH, I”,” 
    SECTION 100-020-200 
    JUNE 1983 
    l SPKR LED: on _ 
    l Listen for CO/PBX dial tone via EKT 
    speaker 
    Depress the m key: 
    @CO 1 LED: 
    Conference call flash rate 
    I 
    l Dial tone continues 
    Depress the m and ‘YFF keys: 
    *CO 1 LED: 
    off 
    .SPKR LED: 
    off 
    l Dial tone: off 4 
    Call EKT from another station: 
    l Listen for voice via speaker after warning 
    tone 
    l Called station INT LED: l-called flash 
    Dial 
    q at calling station: 
    l Tone signalling heard via speaker 
    Adjust tone signalling volume with volume 
    control on the rear left-hand side of the EKT 
    being tested. 
    Depress the m key: 
    l INT LED: l-use flash ’ 
    l SPKR LED: on 
    l Listen for INT dial tone via EKT speaker 
    Lift handset: 
    .SPKR LED: off 
    l Speaker: off 
    l Listen for dial tone via handset receiver 
    Call another station and talk into the hand- 
    set transmitter: 
    l Verify that your voice can be heard via 
    called EKT speaker. 
    Hold down the [K] key, and set the hand- 
    set back on-hook: 
    l INT LED: l-use flash 
    l SPKR LED: on 
    Tap the EKT microphone and verify the 
    sound can be heard via the speaker on the 
    called EKT. 
    Depress the m key while tapping the 
    microphone and verify that the sound cannot 
    be heard via called EKT speaker. 
    Depress the m key: 
    .INT LED: off 
    l SPKR LED: off 
    . . 
    :  
    						
    							INSTALLATION 
    SECTION 100-020-200 
    JUNE 1983 
    11.03 
    This completes the station functional 
    check; repeat the procedure for all stations in the 
    system. 
    11 .lO Off Premise Extension / Conventional 
    Telephone Functional 
    Check 
    11.11 Perform the following test procedure 
    at each Off Premise Extension/Conventional 
    Telephone (OPX) location: 
    a) Lift the OPX handset and listen for intercom 
    dial tone. 1120 
    OPL Circuit Functional Check 
    b) Dial the number of another station: 
    l Dial tone will stop when the first digit 
    is dialed. 1121 
    Perform the following test procedure 
    on each OPL/CO line pair: 
    l Ringing or voice paging will be heard at 
    the called station. 
    c) Lift the handset at the called station: 
    l Ringing stops. 
    d) Verify that a 2-way voice connection exists 
    between the OPX and the called station. 
    e) Go on-hook at both stations. 
    f) Lift the OPX handset and listen for intercom 
    dial tone. 
    g) Dial 
    q : 
    l An idle line, from the group defined by 
    Program 09, will be siezed. 
    l Listen for CO dial tone. 
    h) Dial a test call: 
    l Verify that a 2-way voice connection is 
    established. 
    i) Flash the hook-switch on the OPX and listen 
    for intercom dial tone. 
    j) Dial the number of another station: 
    l Dial tone will stop when the first digit 
    is dialed. 
    l Ringing or voice page will be heard at the 
    called station. 
    k) Lift the handset at the called station: 
    l Ringing stops. 
    I) Verify that a 2-way voice connection exists 
    between the OPX and the called station. 
    -3o- 
    m) 
    n) 
    0) 
    P) 
    4) Flash the hook-switch on the OPX. 
    Verify that a 3-way. conference is established. f _,, 
    Go on-hook at the OPX. 
    Verify that the CO line and called station 
    are connected. 
    Go on-hook at the called station. 
    .a 
    a) 
    b) 
    c) 
    d) 
    4 
    f) 
    9) 
    h) 
    i) 
    j) 
    k) Lift the OPL telephone handset and listen 
    for CO dial tone. 
    Verify that the corresponding CO line LED 
    lights on the system EKTs. 
    Dial a test call from the OPL telephone: 
    * Verify that a 2-way voice connection is 
    established. 
    Depress the corresponding line key on an 
    EKT: 
    l Verify that the privacy feature prevents 
    i, 
    access. 
    Go on-hook at OPL telephone. 
    Depress the OPL CO line key on an EKT and 
    listen for CO dial tone. 
    Dial a test call from the EKT: 
    l Verify that a 2-way voice connection is 
    established. 
    Lift the OPL telephone handset: 
    l Verify that a 3-way voice connection 
    is established. 
    Go on-hook at both stations. 
    Make an incoming call to the OPL CO line: 
    l Ringing will be heard at the OPLtelephone; 
    l Appropriate EKT(s) will ring. 
    l Appropriate EKT LED(s) will flash. 
    Lift the OPL telephone handset to answer 
    the call: 
    l Ringing stops. 
    l EKT LED(s) light steadily. il  
    						
    							l Verify that a 2-way voice connection 
    is established. 
    I) Depress OPL CO line key on an EKT: 
    l Verify that the privacy feature prevents 
    access. 
    m) Go on-hook at the OPL telephone. 
    n) Make another incoming call to the OPL CO line. 
    o) Answer the call using an EKT: 
    l Verify that a 2-way voice connection is 
    established. 
    p) Lift the OP L telephone handset: 
    l Verify that a 3-way voice connection 
    is established. 
    q) Go on-hook at both stations. 
    i) 
    11.30 SMDR Feature Functional Check 
    11.31 Perform the following test to verify 
    the proper functioning of the SMDR feature. 
    a) Connect the printer to the MSMU PCB. 
    b) Set data speed and select type of calls to be 
    recorded per Paragraph 07.20. 
    c) Make an outgoing call from any EKT. 
    MM/DD/W 
    01 10 HH:MM 00:30;51 7305000 
    02 I4 HH:MM 00:02;39 8531212 I23456 
    04 18 HH:MM 00:01;37 12135551212 654321 
    03 I5 HH:MM 00:04;51 I BOO24361 61 
    07 I9 HH:MM 00:02;25 2731750 
    FIGURE 41-SMDR EXAMPLE PRINTOUT (OUTGOING CALL RECORD) 
    MM/DD/W 
    01 10 HH:MM 00:01;13 00~02 
    02 14 HH:MM 00:02;30 00,04 
    02 I 1 HH:MM 00:03;36 0O;lO 665544 
    FIGURE 42-SMDR EXAMPLE PRINTOUT (INCOMING CALL RECORD) 
    ._ ,.. 
    L. 
    -3% : 
    . 
    d) 
    4 
    f) 
    9) 
    h) 
    j) 
    k) 
    1) 
    ml 
    IN3 IALLAI IUN 
    SECTION 100-020-200 
    _. 
    JUNE 1983 
    Enter an account code as follows: 
    l Dial access code ( 3 i?i x ). 
    l Dial the account co.de (6 digits). 
    Hang up after the call has been active-for at 
    least 10 seconds (calls of less than IO-sec. 
    duration will not be recorded). 
    l The call record will be output to the 
    printer in the format shown’in Figure 41. 
    Take the printer “off-line” (DT.R signal “off”). 
    Make an outgoing call. 
    Hang. up after the call has been active for at 
    least IO seconds. 
    l Call record will not be output. 
    Put the printer “on-line” (DTR signal “on”). 
    l Call record will be output. 
    Make an incoming call to the system and delay 
    answering it for several rings. 
    Answer the call. 
    Enter an account code as in step d. 
    Hang up: 
    l Call record will be output to the printer 
    in the format shown in Figure 42.  
    						
    							INSTALLAl IWN 
    SECTION 100-020-200 
    JUNE 1983 
    11.40 Feature Check 
    11.41 Verify that all system features function 
    properly per Section 100-020-400, Operating 
    Procedures. 
    12 MISCELLANEOUS 
    EQUIPMENT CONNECTIONS 
    12.00 Wiring Connections 
    12.01 All connections to miscellaneous equip- 
    ment are made via the barrier strip mounted on 
    the front of the MPRU PCB, as shown in Figure 43. 
    STU2 MINU 
    1 
    a 
    1 x 
    0 
    4MSTl . 
    I 
    L 
    MINU 
    0 MOU 0 
    Ol3Gh-l @ @@ 
    MOPU 
    
    TEL 
    0 
    #2 MOPU 
    FIGURE 43-MPRU CONNECTION STRIP 
    12.10 Music-on-Hold/Background Music Source 
    12.11 Connect the customer-provided MOH/ 
    BGM program source (tuner, tape deck or commer- 
    cial source) via the two MOH terminals on the 
    MPRU barrier strip. Input impedance is 600 ohms. 
    12.20 Music-on-Hold Volume Control 
    1 
    12.31 STRATA provides access to an external 
    paging system by dialing two digits (89). The single 
    output connection is made via the 8/600 terminals [ 
    on the front of the MPRU, and can be used in one 
    = 
    of three ways: 
    a) 
    b) 
    c) To operate customer-provided speaker directly, 
    via an internal 3-watt amplifier located on the 
    MPRU PCB. 
    If more than 3 watts are required, an external 
    customer-provided amplified can be connected 
    to operate the external speaker. 
    If talkback capability is required, a customer- 
    provided talkback amplifier/speaker can be 
    connected. 
    NOTE: 
    See Paragraph 12.80 for the correct volume 
    setting sequence. 
    12.40 Direct External Speaker Connection 
    12.41 
    The exact number of speakers that may 
    be connected to the 8-ohm, 3-watt output will 
    depend on type of speaker used, conductor resis- 
    tance, and desired volume. 
    12.42 
    t The B-ohm output impedance must 
    be selected with the SW2 switch on the MPRU 
    (Figure 44). Th e switch must be on the side labeled 
    “8”. 
    1221 Adjust the MOH volume with the MOH 
    volume control on the front of the MPRU PCB. 
    Maximum volume is limited by internal circuits 
    in order to comply with FCC regulations. See 
    Paragraph 12.80 for the correct volume setting 
    sequence. 
    12.30 External Paging Connections 
    FIGURE 44-IMPEDANCE SWITCH ON MPRU 
    12.43 Connect the external speaker to the 
    two 8/600 terminals on the MPRU. 
    12.44 
    Adjust the speaker volume with the 
    = 
    EX.SP volume control on the front of the MPRU. i 
    -32-  
    						
    							INS IALLAI ION 
    SECTION 100-020-200 
    JUNE 1983 
    See Paragraph 12.80 for the correct volume setting 
    sequence. 
    12.50 External Amplifier Connection 
    12.51 If more power is required than the 
    MPRU amplifier can deliver, a customer-provided 
    external amplifier may be connected to the 8/600 
    terminals on the MPRU (connect external speakers 
    to the external amplifier). 
    12.52 Determine which output impedance is 
    most suitable for the amplifier being used, and 
    make the selection with the SW2 switch on the 
    MPRU (Figure 44). 
    12.53 If 8-ohm impedance is chosen, the 
    EXSP volume control may be used to control 
    input level to the external amplifier. If 600-ohm 
    impedance is chosen, the level is fixed and input 
    must be controlled by the external amplifier. 
    See Paragraph 12.80 for the correct volume setting 
    sequence. 
    12.60 Talkback Amplifier 
    12.61 A customer-provided talkback amplifier/ 
    speaker may be connected to the external page 
    (8/600) terminals on the MPRU. 
    12.62 For talkback operation, the SW2 switch 
    on the MPRU must be set at “600”. The MPRU 
    amplifier is not used for the 600-ohm mode in 
    order to permit a 2-way voice path. 
    12.63 The EX.SP volume control on the front 
    of the MPRU will not function when the 600-ohm 
    mode is selected. 
    12.70 Background Music 
    12.71 Background music (BGM) can be pro- 
    vided in two ways through the STRATA system: 
    a) Internal to the system using the MOH source. 
    b) External to the system when an external 
    amplifier is used on the External Page feature. 
    12.72 Internal BGM uses the music-on-hold 
    program source that is connected to the MOH 
    input terminals on the MPRU. It is broadcast 
    through all EKT speakers (under the individual 
    control of each station user) 
    if the (1 key is operated 
    on-hook and no line selected. 
    ,. and will be heard 
    with the handset 12.73 As a programmable option, the BGM 
    from the MOH source can be heard via the external 
    speaker (see Section 100-020-300, 
    Programmhg). 
    12.74 BGM is automatically preempted when 
    a page or ringing signal must be output from an 
    EKT speaker or the external speaker. 
    12.75 
    Overall system BGM volume is set with 
    the BGM volume control on front of the MPRU 
    (see Paragraph 12.80 for the correct volume setting 
    sequence). The volume at individual stations is 
    set with volume control on the rear right-hand 
    side of the EKT involved. 
    12.76 If BGM is connected via an external 
    amplifier on the external page, it can be heard 
    from the external speaker(s) only. STRATA, 
    if required, can provide a dry contact control 
    signal for muting the external BGM when a page 
    is in progress. 
    12.77 To provide external 8GM control, 
    obtain and install the optional BR (Kl) relay on 
    the MPRU PCB, see Paragraph 05.11. Connect 
    the BR terminals on the MPRU to the control 
    terminals (mute, mike switch, etc) on the amplifier 
    (see Figure 45). 
    Mute 2 output 
    ’ Volume 
    Input 2 J Input 1 
    Level 
    1 ,, 
    I 
    7 Input 2 
    ( Level 
    Tuner 
    Amplifier 
    FIGURE 45 
    EXTERNAL AMPLIFIER HOOK-UP 
    12.80 
    Volume Setting Sequence 
    12.81 
    Refer to Figure 46. Adjust the volume 
    for MOH, BGM and External Page in the following 
    sequence: 
    -33- 
    .  
    						
    							INSTALLATION 
    SECTION 100-020-200 
    JUNE 1983 
    I- 
    (0 
    I 
    0 
    ( T 
    -J I 
    FIGURE 46-VOLUME SETTING CONTROLS 
    1 
    I 
    12.82 Adjust the MOH level first using the 
    following procedure: 
    1) 
    2) 
    3) 
    4) 
    5) 
    6) Set the MOH volume control on the front 
    of the MPRU to its lowest level (counter- 
    clockwise). 
    Lift the handset on one station and call another 
    station using 2 CO/PBX lines. 
    At the called station, put the incoming call 
    on hold, and listen on the handset (not the 
    speaker) of the 
    calling EKT. 
    Using the volume control on the MOH source, 
    adjust MOH to the most comfortable level 
    without distortion. 
    If a higher level is needed than can be provided 
    by the MOH source, turn the MOH volume 
    control on the MPRU slowly clockwise to 
    achieve the most comfortable level without 
    distortion. 
    Release the connection between the two CO 
    lines. 7) No further changes should be made using the 
    MOH control or the MOH source volume 
    control. 
    12.83 If an external speaker is to be used in 
    the system; adjust the external page and BGM 
    levels as follows: 
    1) 
    2) 
    Adjustments should be made while an actual 
    external page test is in progress. Adjust the 
    voice loudness to a comfortable level. The 
    procedure varies depending on the paging 
    system configuration and the setting of the 
    8/600-ohm switch (SW2) on the MPRU: 
    a) 8 ohms with no external amplifier-adjust 
    output level using the EX.SP volume 
    control on the front of the MPRU. 
    b) 8 ohms with external amplifier-adjust 
    output level using the EX.SP volume 
    control on the front of the MPRU along 
    with the controls on the external amplifier. 
    c) 600 ohms-the volume level through 
    STRATA is fixed in this mode;-adjustments 
    must be made using the external amplifier 
    controls. 
    i 
    If background music is to be heard over ex- 
    ternal speaker(s) 
    : 
    a) 
    Adjust voice page level per above procedure. 
    b) With music playing over the speaker(s), 
    adjust the volume to a comfortable level 
    using only the BGM control on the front 
    of the MPRU. Do not tamper with the 
    EX.SP control, external amplifier adjust- 
    ments, or MOH adjustments. 
    c) If background music is connected directly 
    to the external amplifier instead of through 
    the system, all adjustments must be made 
    on the external amplifier. 
    12.84 If no external speaker is to be used in 
    the system, adjust the BGM level as follows: 
    1) Using an EKT in speakerphone mode, make 
    a call on a CO line, and adjust the EKT speaker 
    to a comfortable level. 
    NOTE: i 
    This should be done in an area that has back- 
    ._ 
    -34-  
    						
    							ground noise that is about average for that 
    particular installation. 
    2) 
    3) Disconnect the CO call and activate BGM at 
    the EKT using the m key. 
    Using only the BGM volume control on the 
    front of the MPRU, adjust the BGM to a com- 
    fortable level. Do not use the EKT volume 
    control. 
    12.90 Night Relay Service 
    12.91 As an option, STRATA can provide a 
    dry contact for the purpose of controlling an 
    external loud ringing bell (or similar device) or 
    an answering machine when the system is in the 
    “Nite” mode. 
    --I 7 -J 
    SECTION 100-020-200 .. JUNE 1983 
    12.92 To provide this service,obtain and install 
    the optional NR (K2) relay on the MPRU PCB per 
    Paragraph 05.11. Connect the external device to 
    the N R contacts on the front of the MPRU (see 
    Figure 47). 
    IMPORTANT: 
    The NR and BR relay contacts are rated at 
    24 VDW7.0 Amp and are not intended to 
    operate high power devices directly. If the 
    power required for the device being con- 
    trolled exceeds the contact ratings, an 
    external slave relay must be used. 
    12.93 The W3 strap option on the MPRU 
    allows the NR relay to function in one of two 
    modes: 
    a) 
    b) Answering Machine .Control-if the W3 strap 
    remains intact, the relay is operated contin- 
    uously when the system is in night service. 
    This mode is intended for indirect control 
    of an answering machine. 
    Night Bell Control-if the W3 strap is cut, 
    the relay pulses at a l-sac. on, ‘3~secLoff rate 
    when the system is in night service and an 
    incoming call is ringing the system. The mode 
    is intended to be used for indirect control 
    of an external night bell. 
    FIGURE 47-NR CONTACTS 
    -35-  
    						
    							TOSHIBA SYSTEM PRACTICES 
    ELECTRONIC KEY TELEPHONE SYSTEM TOSHIBA PUBLICATIONS 
    SECTION 100-020-250 
    JUNE 1983 
    Strata 
    XII&XX 
    POWER SUPPLY 
    (EPSA-104) INSTALLATION  
    						
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