Micro Seven Inc.®, model
ST200, NEW, automatic telephone line tester, for digital measurement of loop
voltage, loop current, ring signal, call progress tones, and frequency
attenuation characteristic, distortion characteristics and random noise
amplitude of audio signals between two telephone lines.
Copyrights Micro Seven, Inc.®, 2018
ST200 is the same
size as our model LS15 in the above picture.
PRELIMINARY INFORMATION
Features:
-two
RJ11 jacks to input FXS interface
-measurement
of loop voltage
-measurement
of loop current
-measurement
of ring signal amplitude and frequency with load and without load
-measurement
of dial-tone amplitude
-testing
DTMF/rotary-pulse dialing capability
-frequency
attenuation characteristics of signal connection between two phone lines
-insertion
loss measurement between two phone lines
-harmonic
distortion and random noise amplitude measurement
-RS232
interface
-automatic
test software
-ST200 is a custom instrument to fit your application. One of custom feature
include alarm message option where ST200-1 for sending Contact-ID alarm message
at line 1 and receiving its Contact-ID alarm message at line 2 and vice versa.
Custom configuration fee is required.
Specification
Automatic test software via RS232
interface:
Software: compatible to Windows
Automatic test sequence 1:
1. check loop voltage over Vmin
2. check loop current over Imin
3. check ring signal for minimum amplitude and within frequency
range
4. check dial-tone for Vmin
5. check for minimum DTMF dialing amplitude
6. check signal insertion characteristics between two phone
lines and check frequency attenuation characteristics of several frequencies
and minimum amplitude
7. check for random noise amplitude-the end of automatic test
sequence 1
Automatic test sequence 2: (2-line back-to-back
basic calling test)
1. Call from line 1 to line 2. Send “Automatic test sequence
2-(date) (time) start” at RS232 interface.
2. Line 2 answers the incoming ring signal and goes off-hook.
Transmit answer tone. Send “receive ring signal at line 2, answer with
off-hook, and transmit answer tone.” at RS232 interface.
3. Receive answer tone and check within its range and amplitude
at line 1. Send “ receive the tone at line 1 Ok”.
4. Transmit answer tone at line 1. Receive answer tone and
check within its range and amplitude at line 2. Send “Send answer tone
back-----“
5. Both lines go on-hook, send “signal transmission/reception
success” at RS232 interface.
6. Pause time of between 0 and 2 minutes”
7. go through the same sequence of 1 and 5 originating a call
at line 2 to line.
8. Pause time of between 0 and 2 minutes
Screen of preliminary software is shown
below:
Operating power input: 117V AC nominal,
230V AC custom build
Micro Seven, Inc. ®
1095-K N.E. 25th
Hillsboro, OR, U.S.A.
phone: 503-693-6982
fax: 503-693-9742
Home Page: www.microseveninc.com
Email: sales@microseveninc.com