MICRO SEVEN, INC.® MODEL LS100TM, CO SIMULATOR, MINI-PBX
SIMULATOR, AND TELEPHONE LINE SIMULATOR PROVIDES ANALOG/DIGITAL SWITCHING
CIRCUITS, RING SIGNAL, LOOP CURRENT/LOOP VOLTAGE, CALL PROGRESS TONES,
PROGRAMMABLE TELEPHONE NUMBERS, RANDOM NOISE/20DB INSERTION LOSS FOR LABORATORY
TESTING OF TELECOMMUNICATION EQUIPMENT. MODEL LS100TM’S DIGITAL SWITCHING
CIRCUIT FOR TIME-DIVISION MULTIPLEXING CIRCUIT IS FOR TESTING TELECOMMUNICATION
EQUIPMENT IN LARGE PBX CIRCUIT. CALLER-ID SIGNAL IS AVAILABLE AS AN OPTION.
Micro Seven, Inc.
www.microseveninc.com
sales@microseveninc.com
INTRODUCTION
The
models LS100TM contains digital and analog switching circuit, which may be
selected for communication paths. The digital switching circuit provides
environment for testing telecommunication equipment in real PBX system. The
digital switching circuit mode in LS100TM is implemented with time division
multiplexing method. LS100TM is available for 2-line, LS100-2TM and 4-line,
LS100-4TM. The programmable features include telephone numbers, call progress
tones, pseudo-line impairment mode with random noise, simulated PBX mode,
stutter dial tone, programmable disconnect signal, programmable network
response delay, and distinctive ringing features. Programmed parameters
including telephone numbers are stored in non-volatile memory in LS100TM, and
they are restored upon powering up. LS100TM products are designed to let
engineers and technicians test modems and fax machines without obtaining extra
in-house telephone lines. Pseudo-line impairment mode provides 20 dB signal
attenuation and random noise generation to simulate a long distance
telecommunication line. Envelope delay and frequency attenuation
characteristics, which are standard features in model LS1002J, are not included
in LS100TM. Note that random noise generator is available in analog switching
mode only.
Each
line may be assigned a single-digit telephone number, corresponding to its line
number, or programmable telephone number. Both rotary pulse and DTMF (tone)
dialing are accepted for dialing. Features include dial tone, ring-back tone,
and busy tone at the calling station. The ring signal is generated at the
called line. A line connection is established between two stations when a call
is answered. Pseudo line impairment circuit is selected when dialing unique
numbers by providing additional 20 dB insertion losses for both signal
directions and generating random noise. A transmit-power adjust potentiometer
is provided for each line to lower signal output for testing telecommunication
equipment at much lower signal levels. Indicators are included for POWER ON
(front panel LED), and OH/BUSY for all lines (rear panel of LS100, front panel
of LS200).
SPECIFICATIONS
Signal
switching circuit selection between analog and digital
Analog:
dial 05
Digital: dial 08
Note: factory default condition is digital switching circuit.
Digital
or analog switching circuit mode
The
factory default or restored condition places LS100TM into digital switching
circuit mode. The front-panel green LED power indicator flashes at 30 Hz rate
when LS100TM is in digital switching circuit mode. The LED indicator turns on
steadily in analog switching circuit mode. In the digital switching circuit
mode, audio signal input at each line is routed through CODEC (coder/decoder)
circuit where the signal goes through low-pass filter section and A/D converter.
Then the digital value is transmitted to a common digital signal bus by
time-division multiplexing method where each line in LS100TM is assigned a
time-slot. The transmitted digital signal is captured at a receiver circuit.
For example, when line1 and 2 are connected each other by audio paths, receiver
circuit at line 1 would grab signal at time slot 2 for line 2. Then the line 1
receiver converts the digital signal value into analog signal by using D/A
converter. The analog signal is applied to a low-pass filter section because
converted analog signal contains high frequency component. Because signals are
converted to digital and converted back to analog, received analog signal
contains small random noise called quantityzing noise. Because signals are applied
through low-pass filters, the signal bandwidth is limited to 3400 Hz.
Enabling
programming:
When the
power to LS100TM is turned on, programming parameters in LS100TM is disabled to
enable dialing international telephone number starting 011--- and also to
disable changing pseudo-line impairment condition while testing
telecommunication equipment. By dialing five "#", programming
parameters in LS100TM is enabled.
Dialing:
Telephone
numbers: 1. Primary telephone number: A single-digit telephone number, which is
equal to a line number of a called line, selected by dialing 043 or line1 or 2
as a factory default. 2. Secondary telephone number: selected by dialing 044.
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)
Note:
simultaneous dialing from multiple lines is prohibited by suppressing
generation of dial tones to more than one line because there is one DTMF
receiver circuit in a box.
Programming secondary telephone number: 022 (telephone number)
The factory default condition is 123456789+(line number).
Telephone number digit: 0 # 178 * n n n *, where nnn forms a 3-digit decimal
number.
The default value is 10 digit. The maximum number is 18.
Simulated
PBX Mode:
By
dialing "9", dial tone returns when the Simulated PBX Mode was
selected. Dialing "0#175*004*" for Simulated PBX Mode with dual
frequency call progress tone or 0#175*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 3456789012 and the PBX mode are enabled, dialing of 3456789012 or
93456789012 would ring the other line. To return to non-PBX mode, dial
0#175*000* with dual frequency call progress tone or dial 0#175*008* with
secondary call progress tone.
Line
Characteristics:
Input
impedance at 1 k Hz: 600 ohms +/- 5%
Signal bandwidth for analog switching mode: 150 HZ to 5 k HZ
Signal bandwidth for digital switching mode: 150 Hz to 3.4 kHz
Transmit
Power Adjustment: A potentiometer for each line, accessible through a rear panel
hole, provides a control range of 0 to -40 dB (maximum at full clockwise).
Pseudo-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. Note: Generic Line Impairment Options
are also available for frequency attenuation characteristics and envelope delay
distortion. In digital switching circuit mode, random noise generation is
disabled in pseudo-line impairment mode. Note that LS100TM does not contain
circuits for envelope delay distortion nor frequency attenuation
characteristics that are available in other models such as LS100-2J.
Random
noise amplitude programming: 0#168*nnn*
The random noise amplitude is set at –55 dBm as a factory default value, and it
is programmable by the above dialing method. The factory default value is
obtained with nnn=017. 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-pseudo-Line
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
condition.
Battery-feed
voltage (loop voltage) and loop current: -20 volts and 25 mA
Ring
Signal: 30
Hz square wave. Normally 2 sec on 4 sec off with exception of distinctive
ringing features programmed.
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:
1. Dual-frequency call progress tones
Signal
power: nominal -20 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%.
Caution: When dual-frequency call progress tones are selected, dial tone to
a line will not be generated until a called line is answered or a calling line
aborts a call.
2.
Secondary Call Progress Tones: Frequency: 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
. Dialing 07 switches back to the dual-frequency call progress tones.
Note: The secondary call progress tone is a factory-default condition.
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
Hot-line
mode: dial 06
Dialing
06 places LS100TM into hot-line mode. Lifting a receiver of a telephone set at
line 1 would ring line 2. And also lifting a receiver of a telephone set at
line 2 would ring line 1. In LS100-4TM, lifting a receiver of a telephone set
at line 3 would ring line 4. And also lifting a receiver of a telephone set at
line 4 would ring line 3. The hot-line mode does not restore upon turning off
power and back on.
Power
Switch: on
rear panel
Network
response delay:
Time
delay between the end of dialing and ring-signal application is programmable by
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, must be
non-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 lines.
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.
Power
Requirements: 100-130 VAC, 50/60 Hz, 18 watts maximum, 220V power supply option
is available.
Fuse:
0.15A,
3AG, SLO-BLO
Dimensions:
8.35
in (21.2 cm) Wide x 2.5 in (6.35 cm) High x 7.25 in (18.4 cm) Long.
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 LED display for analog
circuit, and flashing LED display for digital circuit.
Weight:
3.5
lbs. (1.6 kg.)
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.
Programmable
parameters: Programmable parameters are restored in non-volatile memory.
Caution: The maximum number of changing programmable parameters is
limited; therefore, continuous changes of programmable parameters should be
discouraged.
The
restoration of factory default is done by dialing 04#:
The
factory default conditions are as follows:
-digital switching circuit
-primary (short) dialing method (single digit).
-No pseudo-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.
-Secondary telephone number is set for123456789+(line number), ten digits.
-No network response delay
-Disconnect signal of 320 ms
-Secondary call progress tone instead of dual frequency call progress tones
Available
options:
1.
Serial Interface Option (for programming telephone numbers, call progress
tones, pseudo-line impairment mode, random noise, network delay, disconnect
signal, PBX mode, all parameters)
2. Caller-ID Option
3. 230V AC power input option
4. Select 2-line LS100-2TM or 4-line LS100-4TM
Micro Seven, Inc.
www.microseveninc.com
sales@microseveninc.com