Model LS15, Battery-Operated, Hand-held and, International Telephone Line Simulator, CO Simulator Providing Ring Signal, Loop Current/Loop Voltage, Call Progress Tones, Programmable Telephone Numbers with Caller-ID Signals (US and ETS) and Random Noise Generators For Simulation of the Long-distance Telephone Lines




Micro Seven Model LS15, Hand-held International Telephone Line Simulator, provides battery operation as well as AC/DC adapter operation. The model LS15 with international power adapter option is intended to be used all around the world. The international power adapter option provides four different power plugs (US/Japan, BK, Australian, and European) in 90-250V AC. Because it is battery-operated unit, the application include modem and telephone sets testing in engineering, manufacturing, and fields, emergency telephone equipment, telephone line simulators for telephone line installers, and dedicated telephone lines for various outdoor activities including athletic events. The LS15 contains dual frequency call progress tones, 20Hz sine wave ring signal, programmable loop voltage, short primary or programmable secondary telephone number, caller-ID generation, caller-ID on call-waiting generation, stutter dial tone, Visual Message Display messages, 1kHz test tone, distinctive ring signals, and many other test tones. The LS15 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 40 V, and many CW-CID parameters. All the programmable parameters are restored back after the power to LS15 is turned. The model LS15 also includes the Sleep mode, a power-saving feature, where the power is shut down when both lines are on-hook for certain period. Therefore, the power switch of LS15 may be left on indefinitely consuming little power. The model LS15 is small and light that technicians may carry it on their shoulders or on waist belts with an optional case. The rechargeable battery inside LS15 provides several hours of battery-power operation, and the battery may be recharged overnight with a provided AC/DC adapter. The LS15 may also be operated by provided AC/DC Adapter or an external DC source with Car Battery Adapter. A carrying case, Car Battery Adapter, and international power adapter option providing four different power plugs (US/Japan, BK, Australian, and European) are available as options. The LS15 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. Programmed parameters are still restored for model LS15 without battery.
A lower cost model
LS15-C without caller-ID and other features is also available.



 Note: all programmed parameters are stored in non-volatile memory except for hot-line mode.

Dialing telephone numbers: 1. Primary telephone number as a factory default
2. Secondary telephone number: A secondary telephone number is same as a calling number in caller-ID. A telephone number can not start with 0.

Dialing Method:

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

Line Characteristics: Input impedance at 1 k Hz: 600 ohms +/- 5%
Signal Bandwidth: 150 HZ to 3.5 k HZ

Line Impairment Mode: 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.

Battery-feed voltage (loop voltage): Selection between -20 or -40 volts:

Ring Signal: 20 +/- 2% Hz sine wave. Normally the ring signal duration is 2 sec on 4 sec off. Programming of distinctive ringing signals are installed.
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.

Distinctive ring signal features:
(a). 2 sec on/ 4 sec off (default condition)
(b). 0.8 sec on, 0.4 sec off, 0.8 sec on, 4 sec off
(c). 0.4 sec on, 0.2 sec off, 0.4 sec on, 0.2 sec off, 0.8 sec on, 4 sec off
(d). 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%)
Secondary call progress tones with single frequency tone of 480 Hz may be selected instead of generating dual frequency call progress tones. The signal power is 18.5 dBm.

Stutter dial-tone: enabled/disabled

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

Power Switch

Built-in Battery: The battery is charged when the LS15 power switch is off.
Battery Capacity: 2.5 hours of battery operation with maximum load of both lines off-hook.
Recharging time: 24 hours
Charge/discharge cycles: 100 times minimum

Hot Line Mode: In hot Line mode lifting a handset at line 1 or line 2 calls the other line without dialing.

Network response delay: Time delay between the end of dialing and ring-signal application is programmable.

Forced called-party disconnect: When two lines are connected and one line hangs up, disconnect signal is generated to both calling and called lines.

Programmable disconnect signal: The disconnect signal, which is interruption of loop current at the end of call is programmable.

Sleep Mode (Automatic Power Shut-Down ): The Sleep mode is enabled as a factory default condition. When both lines are idle (on-hook) for more than thirty seconds, it enters into the Sleep mode by saving power consumption down to a minimum amount

AC/DC Adapter: 117VAC +/- 5%, or 220VAC +/- 5%(for 220V unit)

AC/DC Adapter or Car Battery Adapter input (also as a battery charger): 12VDC (unregulated voltage), 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, steady-blinking to indicate low-battery condition, dim-blinking to indicate that the battery charge is almost gone.

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.


Caller-ID Signals: Frequencies: 1200Hz +/- 2 Hz, 2200Hz +/- 5Hz
Signal power: -14dBm into 600 ohms
Dialing 048 repeats caller-ID sequences.


Programmable parameters for caller-ID:
Date + Time
Telephone number
Private status
Out-of-area status
Multiple-message format
Single-message format
Multiple-message format without name
Wrong check-sum generation
Visual message waiting ON
Visual message waiting OFF
Silence period right after the end of the first ringing period before a caller-ID sequence
Suppressing ring signal
Call qualifier (long distance indication) on/off
Telephone number digit
Name length is programmable by: 0 # 1 7 9 * n n n *
Enabling continuous caller-ID generation


Call-waiting caller-ID:

SAS duration, CAS duration, acknowledge period, Caller-ID Data Transmission Delay between DTMF reception and FSK data generation are programmable. The call-waiting CID sequence is started by dialing 0 5 *.
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. 

Other caller-ID programmable parameters:
1. Programming of marking period in caller-ID: In the on-hook and off-hook caller-ID, the marking period before the FSK data is programmable.
2. Channel Seizure Period Programming

Note: Programmed parameters memory and restoration of factory standard: All operating parameters are saved in LS15 memory when the power is turned off.

Factory Default Conditions: The restoration of following factory standard may be accomplished by dialing a special code:
-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 sleep mode is enabled.
-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: Line1: ABCDEFGHIJKLMNP, and Line 2: BCDEFGHIJKLMNOP
-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.

Test tones: The test-tones are produced after dialing the following:
051: 350 Hz, -18.5dBm
052: 440 Hz, -18.5dBm
053: 480 Hz, -18.5dBm
054: 620 Hz, -18.5dBm
055: 1200 Hz, -14dBm
056: 2200 Hz, -14dBm
057: Channel Seizure Signal (1200, 2200), -14dBm
058: 2130 Hz, -23dBm
059: 2750 Hz, -24dBm
050: CAS (2130+2750), -20dBm
05#: 1004 Hz, on/off by 5 Hz, -12dBm

Options and Accessories: Carrying case, Car Battery Adapter, and international power adapter option (117V input unit is a standard.)

Micro Seven, Inc., Hillsboro, OR, U.S.A. Phone: 503-693-6982, Fax: 503-693-9742 or if you have any questions or E-mail: