Micro Seven, Inc., model LS15-1-ETS




Micro Seven Model LS15-1-ETS, Telephone Line Simulator, provide simulated CO functions of modem and telephone sets testing in engineering, manufacturing, and fields, and emergency telephone equipment. The LS15-1-ETS contains dual frequency call progress tones, 20Hz sine wave ring signal, programmable loop voltage, short primary  or programmable secondary telephone number, caller-ID generation and caller-ID on call-waiting generation for both Bellcore and ETS standards, stutter dial tone, Visual Message Display messages, 1kHz test tone, distinctive ring signals, and many other test tones. The LS15-1-ETS also contains line-impairment mode with extra insertion losses and random noise added for long-distance telephone lines. The programmable parameters include caller-ID name and telephone numbers, privacy/out-of-area, single/multiple message format, date and time, battery voltage of 20 or 40V, and many CW-CID parameters. All the programmable parameters are restored back after the power to LS15-1-ETS is turned. The LS15-1-ETS may also be operated by an external DC source with Car Battery Adapter.  A carrying case, Car Battery Adapter, and 220V version of AC/DC adapter are available as options. The LS15-1-ETS is also equipped with a forced-disconnect feature where disconnect signals are sent to calling and called lines. The duration of the disconnect signal is also programmable. Programmable network response delay simulates time delay after completion of dialing. Simulated PBX mode returns dial tone after dialing 9. The secondary call progress tone generates a single-frequency tone instead of dual-frequency call progress tone. Switching between ETS and Bellcore modes is possible by using control software provided. Caller-ID data transmission during and prior to ringing with CAS and ringing alert signal is supported. DTMF caller-ID transmission during ringing period and prior to ring is also included.





     Telephone numbers:

          1. Primary telephone number: selected by dialing 043 or line1 or 2 as a factory default.

          2. Secondary telephone number: selected by dialing 044.

              A secondary telephone number is same as a calling number in caller-ID.

             Warning: Using secondary telephone number in a privacy mode is prohibited.

              Please read section 4.3 Programming of Caller-ID Parameters for details.

     DTMF dialing signal power: -13dBm to +5dBm per a frequency with no more than 4dB

                                                 difference between frequencies.

     DTMF dialing detection time: 45 ms

     Pulse dialing: Break period: 45 to 75 ms (60 ms nominal)

                            Make period: 30 to 60 ms (40 ms nominal)


Simulated PBX Mode:

     By dialing "9", dial tone returns when the Simulated PBX Mode was selected.

     Dialing "0#252*004*" for Simulated PBX Mode with dual frequency call progress tone or

     0#252*012* for Simulated PBX Mode with secondary call progress tone.

     Note that the regular dialing methods work as well here. For example, if the secondary  

     dialing method with a telephone number of  3456789012and the PBX mode are enabled,

     dialing of 3456789012 or 93456789012 would ring the other line. To return to non-PBX

     mode, dial 0#252*000* with dual frequency call progress tone or dial 0#252*008* with

     secondary call progress tone.


Line Characteristics:

    Input impedance at 1 k Hz: 600 ohms +/- 5%

    Signal Bandwidth: 150 HZ to 3.5 k HZ


Line Impairment Mode:

    When a number of 00 and line-number is dialed, line impairment circuit with additional 20dB

    of insertion loss and -55dBm of random noise are added to signals between line 1 and 2.

    Random noise amplitude is also programmable. Frequency attenuation characteristics and

    envelope delay distortion of signals are not affected.


Random noise amplitude programming:


    The random noise amplitude is set at –55 dBm as a factory default value, but it may be

    changed by the above dialing method. The factory default value is obtained with nnn=011.

    The smaller number, the lower signal power.

     i.e. nnn=176 for –31 dBm, nnn=088 for -37 dBm, nnn=044 for -43 dBm,

     nnn=022 for -49 dBm, nnn=005 for -61 dBm , nnn=000 for -67 dBm of random noise.


Non-impairment mode:

    When a number of 09 and a line number is dialed, the insertion loss between

    lines becomes only 1 dB, and the random noise is removed. This is the factory default



Battery-feed voltage (loop voltage):

    Selection between -20 or -40 volts:

    1. -20 volts mode is selected by dialing 041, and it is a factory default condition.

    2. -40 volts mode is selected by dialing 042. The battery-feed voltage is changed to -20 volt

        mode when called line is ringing or in its off-hook state (answered). When the called line

        hangs up the line, the battery-feed voltage is returned to -40 volts.


Ring Signal:

    20 +/- 2% Hz sine wave. Normally 2 sec on 4 sec off with exception of distinctive ringing

    features programmed.

   Amplitude: 67V RMS into open circuit. It is 66 V RMS into RN=0.1, 56 V RMS into RN=0.5,

        48V RMS into RN=1, and 40V RMS into RN=1.7.

        According to the FCC-part 68 rule, the RN=7000/(equivalent resistive value in ohms)

       for ring signal of 20Hz +/- 3%.

   The ring signal at a called line is disabled by dialing *0. To enable back to ringing at a called

   line, dial *0 again.


Distinctive ring signal features:

    The following distinctive ringing pattern is enabled instead of standard 2 sec on/ 4 sec off

    ringing pattern:

    (a). Dialing 0 * 1 + (line number): 2 sec on/ 4 sec off   (default condition)

    (b). Dialing 0 * 2 + (line number): 0.8 sec on, 0.4 sec off, 0.8 sec on, 4 sec off

    (c). Dialing 0 * 3 + (line number): 0.4 sec on, 0.2 sec off, 0.4 sec on, 0.2 sec off, 0.8 sec on,

          4 sec off

    (d). Dialing 0 * 4 + (line number): 0.3 sec on, 0.2 sec off, 1 sec on, 0.2 sec off, 0.3 sec on,

           4 sec off


Off-hook impedance requirement: 400 ohms maximum DC, 600 ohms nominal AC


Call Progress Tones:

    Standard dual-frequency call progress tones: nominal -16 dBm.

        Dial Tone: 350 Hz + 440 Hz, continuous unless programmed for stutter dial tone

        Ring-back Tone: 440 Hz + 480 Hz, 2 sec ON/4 sec OFF.

        Busy Tone: 480 Hz + 620 Hz, 0.5 sec ON/0.5 sec OFF.

        Accuracy in frequency component: +/- 1%.


    Secondary Call Progress Tones: (480 Hz +/- 1%)

        Dialing 07 enables the secondary call progress tones. Instead of generating dual

        frequency call progress tones, single-frequency tone of 480 Hz is produced with signal

        power of –18.5 dBm. Dialing 07 switches back to the dual frequency call progress tones.


Stutter dial tone:

    Dialing 046 enables stutter dial tone with three of 0.1 seconds on/off period following with

    continuous dial tone.

    Dialing 045 disables the stutter dial tone. It is a factory default condition.


Line Input Jacks: USOC-RJ11-C, standard modular phone jacks


Power Switch: on when the switch is pushed in, off when the switch is pushed out.


Hot Line Mode:

    Dialing 06 enables the Hot Line mode, which calls the other line without dialing a number. To

    return to non-hot-line mode, dial 06 during the first 0.5 seconds right after off-hook.


Network response delay:

    Time delay between the end of dialing and ring-signal application is programmable by the

    following dialing:

         0#170*nnn*, where nnn is a 3-digit decimal number between 1 and 255. The time delay is

         determined by 8.6 ms x (nnn-1). The number, nnn, should not be zero.

         The factory default is 0 seconds.


Forced called-party disconnect:

    When two lines are connected and one line hangs up, disconnect signal is generated to both



Programmable disconnect signal:

    The disconnect signal, which is interruption of loop current at the end of call when one line

    hangs up is programmable by the following dialing:

         0#169*nnn*, where nnn is a 3-digit decimal number between 1 and 255. The time delay is

         determined by 8.6 ms x (nnn). The number, nnn, should not be zero.

    The factory default is 320 ms.


AC/DC Adapter: 117VAC +/- 5%, or 230VAC +/- 5%(for 220V power option), or 90-250V (international power supply option)


AC/DC Adapter or Car Battery Adapter input (also as a battery charger): 12VDC

    unregulated, 800mA maximum


Line Status Display: red LED for each line to indicate off-hook status (continuous on)

    or ringing status (blinking)


Calibration: not required


Power On Indicator: green LED display on front panel


Dimensions: 19 cm (4") W x 4.5 cm (1.75") H x 10 cm (7.5") L


Weight: 500g (1.1 lbs.)


Environmental: Operating temperature: 0 to 35 degree C, Humidity: 85% RH at 35 degree C


Warranty/Service: 6 months limited warranty. No warranty if any factory seal is broken.

    Service is performed at the factory, usually within 5 working days.


On-hook and off-hook (call-waiting caller-ID) caller-ID FSK Generation:

    Single message and multiple message-format caller-ID FSK generations are supported.

    Programming parameters includes telephone number, name, date and time, telephone

    number length, name length, privacy/out-of-area, call qualifier on/off, visual message on/off,

    marking period before FSK data, silence period after the first ring, continuous caller-ID

    generation on/off, and wrong checksum generation on/off.  No ring signal is

    produced for the visual messages. It also includes an FSK data expansion capability of

    caller-ID data. CAS and ringing alert signal originated FSK data transmission is included.


Caller-ID Signals:

Signal power: -14dBm into 600 ohms

Dialing 048 repeats caller-ID sequences. Running control software, LS15G.EXE, is required to switch caller ID mode between Bellcore and ETS modes.


1. Bellcore mode: Frequencies: 1200Hz +/- 2 Hz, 2200Hz +/- 5Hz

2. ETS mode: Frequencies: 1300 Hz +/- 2 Hz, 2100Hz +/- 5Hz


DTMF caller-ID signals:

During ringing and prior to ringing transmission in ETS standard is supported. The DTMF transmission starts “D (caller’s telephone number) C”. The timing of DTMF on period and off period is programmable.


Programmable parameters for caller-ID:


    01 + Date + Time, i.e. 0106011230 for 12:30 A.M., June1.


    02 + (line number) + (telephone number), i.e. 0225035551212 to assign 5035551212 for

       line 2. The programmed number is the same as the secondary telephone number.

       A caller-ID display with a re-dial feature can dial a calling line.


    02 + (line number) + *, to assign private status.

        Caution: The caller-ID number, which is secondary telephone number, will be destroyed by

           setting privacy mode; therefore, the caller-ID number must be reprogrammed again.


    02 + (line number) + #, to assign out-of-area status.

        Caution: The caller-ID number, which is secondary telephone number, will be destroyed by

            this action; therefore, the caller-ID number must be reprogrammed again.



    03 + (line number) + (3-digit ASCII)*(3-digit ASCII)*------

        i.e. 0 3 1 0 7 7 * 0 7 3 * 0 6 7 * 0 8 2  * 0 7 9 *0  ------- to assign MICRO--- for line 1 name.

        All characters must be entered to program a complete name. ASCII equivalent of

        characters are found in Appendix C, ASCII TABLE.


    Multiple-message format: * 1


    Single-message format: * 2


    Multiple-message format without directory number: * 3


    Wrong check-sum generation: * 4

        Reset by the above *1, *2, or *3


    Visual message waiting ON : * 5

        Reset by the above *1, *2, or *3


    Visual message waiting OFF : * 6

        Reset by the above *1, *2, or *3


    Silence period right after the end of the first ringing period before a caller-ID sequence: * 7 n,

        where total time is n times 100 ms. “0” is considered as a decimal number of ten. The

        factory default is 500 ms.


    The ring signal may be turned on/off by dialing * 0.


    Call qualifier (long distance indication) on/off: *#


    Telephone number digit: 0 # 1 7 8 * n n n *, where nnn forms a 3-digit decimal number.

        The default value is 10 digit. The maximum number is 18.


    Name length is programmable by: 0 # 1 7 9 * n n n * 


    Continuous caller-ID generation may be enabled by dialing  0 4 8. To disable continuous

         caller-ID generation, dial 0 4 7.


Programmable parameters for Call-waiting caller-ID:

    SAS duration (0#161*nnn*), CAS duration (0#162*nnn*), acknowledge period (0#163*nnn*),

    Caller-ID Data Transmission Delay between DTMF reception and FSK data generation

    (0#164*nnn*) are programmable. The call-waiting CID sequence is started by dialing 0 5 *.

    Dialing 048 repeats call-waiting caller-ID sequences.

    Subscriber Alert Signal (SAS): 440Hz +/-2 Hz, -19dBm into 600 ohms

    CPE Alert Signal (CAS): 2130 Hz +/- 10Hz, 2750 Hz +/- 10 Hz, -20dBm into 600 ohms, tone

    level tolerance of +/- 1 dB per frequency.


Programming of marking period in caller-ID:

    In the on-hook caller-ID, the marking period before the FSK data is programmable by

    0#166*nnn*. In the off-hook caller-ID (caller-ID on call-waiting), the marking period is

    programmable by 0#167*nnn*.


Programming of Channel Seizure Period:   0#165*nnn*


Programmed parameters memory and restoration of factory standard:

  All operating parameters are saved in LS15-1-ETS memory when the power is turned off.


  Caution: The maximum number of changing LS15-1-ETS programmed parameters is limited to   

                  two million operations; therefore, continuous programming of LS15-1-ETS parameters

                  should be avoided.


  The restoration of memory to the following factory standard is done by dialing 04#:


       -Bellcore mode instead of ETS mode

       -Select primary (short) dialing method.

       -Battery-feed voltage of -20V

       -No line impairment mode is selected.

       -The random noise amplitude is set at -55dBm for the line impairment mode.

       -Continuous dial tone, not stutter dial tone.

        -The programmable telephone number and caller-ID telephone numbers if enabled, are set

           as the following ten digits: line 1: 1234567890, and line 2: 2345678901

       -Selects multiple message format display for caller-ID.

       -The names of caller-ID parameters are the following in 15 digits:


       -The time and date are set as 12:30 p.m., January 1.

       -The call qualifier is turned off.

       -Marking period before FSK data: 160 ms (on-hook caller-ID generation),

           70 ms (off-hook caller-ID display)

       -Silence period after the ring: 500 ms

       -Disable continuous caller-ID display

       -Enable caller-ID generation with ring-signal.

       -SAS duration of 300 ms

       -CAS duration of 80 ms

       -Acknowledgement timeout period of 160 ms

       -Wait time between DTMF reception and start of FSK data generation of 50 ms

       -Channel Seizure Signal Length of 30 characters of hex55

       -No network response delay

       -Disconnect signal of 320 ms

       -No Hot-line mode.

       -Dual frequency call progress tones are selected instead of secondary call progress tones.


Options and Accessories:

    Polarity reverse relay option for line 2.

    Carrying case

    Car Battery Adapter

    230V input AC/DC Adapter (117V input unit is a standard.

    International power supply option for 90-250V input with four different power plugs (US, UK, Europe and 



Caller-ID transmission methods


LS15-1-ETS supports the following caller-ID transmission methods, and each transmission method may be selected by the control software:

1.FSK Data Transmission during ringing (standard feature that is described throughout this manual). (ETS 300 659-1, 6.1.1)

2. FSK Data Transmission prior to ringing

(a)   Dual Tone Alerting Signal (DT-AS) (ETS300 659-1, 6.1.2 (a))

Tone consisting of 2130 Hz and 2750 Hz is generated in front of FSK data followed by ringing.

(b)   Ringing Pulse Alerting Signal (RP-AS) (ETS300 659-1, 6.1.2 (b))

     Short ringing is generated in front of FSK data followed by regular ringing.


In addition to the above transmission method, FSK Data Transmission not associated with ringing with DT-AS signal, ETS300 659-1, 6.2 (a) may be produced by selecting the above FSK Data Transmission prior to ringing by using control software and disable ring signal by using control software also.


PC Interface:

9-pin D-sub connector with PC/LS15-1-ETS cable, control software for programming caller-ID parameters and other telephone parameters are included.
Please contact Micro Seven, Inc., 1095-K NE 25th Hillsboro, OR 97124



phone: (US) 503-693-6982

fax: (US) 503-693-9742