Micro Seven, Inc.
LS300 Advanced Telephone
line simulator
Advanced
Telephone Line Simulator, model LS300, provides a 2-line simulated
telephone-line station with displays of dialed numbers, loop voltage, and loop
current in a 19-inch rack-mount configuration. The loop voltage and loop
current are adjustable for wide ranges by panel-mounted potentiometers. Ring
signal frequency and amplitude and random noise amplitude are adjustable by
potentiometers through front panel holes. Random noise and frequency
attenuation characteristics are enabled or disabled by dialing unique numbers
to test telecommunication products for their frequency responses. It also
contains an RMS voltmeter for measurement of DTMF signal amplitude, signal
levels, and ring signal amplitude. The Caller-ID option provides caller-ID
signals that transmit caller's names, directory numbers, date, time, and
private/out-of-area information. Alarm panel testing option is also available.
Models LS300, Advanced Telephone Line
Simulator
Various
models: LS300-1, LS300 with Caller-ID & RS232C interface
LS300-2,
basic LS300
LS300-3,
LS300 with true Line Impairment Options
LS300-4,
LS300 with true Line Impairment Option and Caller-ID & RS232C Interface
LS300-5,
LS300 with alarm panel testing option and true Line Impairment Option and
Caller-ID & RS232C Interface
FOB:
Hillsboro, OR
Term:
VISA/MC, COD, or net30(for credit-approved customers)
Features
-
Testing of Ademco contact-ID alarm panels under the worst case telephone line
conditions
-
Display of dialed numbers, loop current, and loop (line) voltage
-
Easy adjustment for loop current and loop voltage
-
Adjustable Ring Signal Frequency, ring signal amplitude and random noise level
-
Programming of frequency attenuation characteristics and inserting random noise
-
Ring Switch to generate ring signal at line 2 without dialing a number
- 16
digit-dialing or user programmable phone numbers
-
Dual frequency call progress tones
-
Distinctive ringing features (total four different ringing patterns)
- RMS
voltage display
-
Caller-ID generation (option)
Application
and benefit
-
Useful tool to test telecommunication products for many criteria including dial
numbers, loop current responses, and loop voltage responses.
-
Measurement of DTMF amplitude level, or signal amplitude by using RMS option.
-
Testing for frequency responses
-
Testing distinctive ringing receiver
-
Testing Caller-ID receivers (Caller-ID Option)
SPECIFICATIONS
Front Panel Displays and Controls
Numerical
LED displays: loop current, loop voltage, and dialed number (or RMS voltage
display)
4x7
segment LED (total 20 segments), hexadecimal, 0.3 inches character height.
Loop
current for Line 2: 2-digits, 20-60 ma +/- 1 ma
Loop
voltage (line voltage across tip and ring) for line 2: 2-digits, 20-60 V, +/- 1
V
Dialed
Number for line 1 and line 2: 4-digits with leading zeros blanked
LED Indicators:
Power:
green LED
Ring
Indicator for Line 2: Red LED is on when ring signal is applied at line 2.
OH/BUSY
LED for line 1 and line 2: Red LED to indicate presence of loop current. When
high current is drawn during the ring cycle, the LED is also turned on dimly.
Panel-mount Potentiometers:
To
adjust loop current for line 2 within a range of 20-60 ma and loop voltage for
line 2 within a range of 20-60V. The loop voltage may be measured as line
voltage at line 2 with on-hook condition.
Potentiometers adjustment through front
panel holes:
Noise
adjustment: Random noise is inserted to both line 1 and line 2 when frequency
attenuation mode is enabled after dialing 0 0 and line number.
Ring
signal amplitude adjustment: 40 to 100 VRMS
Ring
signal frequency adjustment: 16 to 68 HZ
Transmit
power adjust potentiometers: 0 to 40 dB
Note:
The minimum insertion loss between line 1 and 2 is 2 dB.
Front-Panel-Switches:
Ring
Switch to start a ring cycle at line 2. When it is pushed again, it stops the
cycle.
Aux.
Switch: It indicates that the RMS display of loop voltage is selected.
RS232 interface:
Programmable features: telephone number, line impairment option,
call progress tones, disconnect signal, PBX mode, caller-ID etc. The control
software for MSDOS is provided.
Dialing:
Telephone
Numbers: primary telephone number for 1 or 2 as a factory default condition.
Secondary
telephone number: (programmable telephone number)+(line number)
For
example, 18005551211 for line 1 and 18005551212 for line 2.
DTMF
dialing: -13 dBm to +5 dBm per a frequency, and no more than 4 dBm 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)
Line characteristics:
Input
impedance at 1 kHz: 600 ohms +/- 5%
Signal Range: -45 to +5 dBm
Bandwidth noise: 2mV P-P max. (-60 dBm) (full bandwidth mode)
Signal Bandwidth: 150 HZ to 5 kHz (full bandwidth mode)
Frequency attenuation characteristics for both signal directions:
-Dial
0 0 to get the frequency attenuation characteristics and random noise enabled.
Relative Attenuation Characteristics to 1 kHz:
+12 dB @ 300 HZ
+ 8 dB @ 500 HZ
+ 8 dB @ 2500 HZ
+12 dB @ 3000 HZ
-Dial
0 9 to return to full bandwidth mode.
Off-hook impedance requirement:
400
ohms maximum DC, 600 ohms nominal AC
Disconnect Signal:
There
is interruption of loop current for 0.5 sec when the other line terminates a
call. For example: assuming that the line 1 and 2 are connected. The loop
current of line 1 is interrupted for 0.5 sec when the line 2 hangs up.
Dual Frequency Call Progress tones:
Dial
Tone: 350 Hz + 440 HZ continuous.
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.
Signal Power: - 20 dBm nominal.
Ring Signal:
Amplitude: 40 to 90 VRMS sine wave
Frequency: 16 to 68 HZ
Interval: nominally 2 sec ON/4 sec OFF
Distinctive Ring Features: User programmable for four different ringing
patterns.
It is set as 2 sec on/4 sec off as a power-up default condition.
Transmit Power Adjustment Potentiometers:
It
attenuates the signal output from the line between 0 to -40 dB range.
RMS Voltage Measurement
RMS
Measurement Mode is entered by pushing Aux. Switch once to display AC RMS
voltage of line voltage at line 2. It goes back to the normal DC voltage
display by pushing the Aux. Switch again.
Caller-ID Option:
Caller-ID
Option simulates Caller-ID signals that are provided by telephone companies. It
transmits date, time, name and calling line's phone numbers. It supports both
single and multiple message formats for U.S. and Canada. The privacy or
out-of-area code instead of transmitting phone numbers and names is also
enabled. It contains a battery-backed real-time clock, and most of caller-ID
parameters are programmable by entering special DTMF codes. It is also
programmable by RS232C interface.
Line Input Jacks: USOC-RJ11-C, standard modular phone
jacks
Power: Requirement: 100-130 VAC, 50/60 HZ
Note: 230V power unit is also available.
Fuse: .3A, 3AG, SLOBLO
MISC.
Dimensions: 19"W x 3.5" H x
13" L
Weight:
13 lbs.
Environmental:
Operating temperature: 0 to 45 degree C Humidity: 85% RH at 45 degree C
Warranty/Service:
Six month limited warranty. Service is performed at the factory, usually within
10 working days.
LS300-5,
which includes alarm receiver, model CT10, is shown in the above picture.
Micro
Seven, Inc., Hillsboro, OR, U.S.A.