Micro Seven, Inc.â, MINI-PBX SIMULATOR, model LS100-2JX, is inserted to PBX line to simulate various telephone line conditions for Incoming and outgoing calls.

Introduction

Micro Seven Model LS100-2JX, MINI-PBX SIMULATOR, is a programmable telephone line simulator that simulates various telephone line conditions in terms with insertion loss, frequency attenuation characteristics, random noise, and envelope delay distortion. Unlike model LS100-2J, which contains two central office telephone functions, LS100-2JX contains one central office telephone line function at line 1 and one CPE function like modem or telephone set at line 2. A PBX inside line may be directly connected to the CPE port at line 2. When LS100-2JX receives ring signal at line 2, it generates similar ring signal at line 1. When a modem or telephone set at line 1 answers the call, signal paths are established between line 1 and 2. Depending on selection of line impairment condition from the ideal case to the worst case, signals between line 1 and 2 are impaired for attenuating signals, or affecting frequency response, or adding random noise, or providing envelope delay distortion characteristics. There are total five different line conditions that are available as telephone line conditions with programmable random noise generator. Likewise, in outgoing calls from line 1 to line 2 and PBX port, rotary-pulse and DTMF dialing are available. When a modem or telephone set at line 1 goes off-hook, dial tone from PBX line is heard at line 1. When it completes dialing, selected line impairment conditions are inserted for signals between line 1 and 2. Line impairment parameters are programmable via RS232C port with Micro Seven control software. Line impairment conditions are dynamically changed while two modems are communicating through LS100-2JX. The control software is included as a standard accessory.

LS100-2JX is housed in a rugged aluminum case, Two RJ11-C connectors, fuse holder, and power connection are on the rear panel. A power indicator and RS232C connector are on the front panel. The ring signal is generated inside LS100-2JX, and its frequency is programmable. DTMF dialing monitor displaying dialed number is included.

220V version is also available as an option.

SPECIFICATIONS

Line 1: PBX SIMULATOR (central office simulator):

-Battery-feed: -22 volts@ 25 mA

-Ring signal frequency: 20 +/- 2% Hz sine wave (as a factory-default).

The frequency is programmable with control software, which is provided.

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%.

-Disconnect signal generated for 200ms

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

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

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

Signal Bandwidth: 150 HZ to 3.5 k HZ

Transmit Power Adjustment: A potentiometer for each line, accessible through a front panel hole, provides a control range of 0 to -40 dB(maximum at full clockwise).

Line 2: CPE port (to PBX port)
-ring signal detection
-loop current detection
-high voltage isolation between line 2 and instrument case

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

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

Transmit Power Adjustment: A potentiometer for each line, accessible through a front panel hole, provides a

control range of 0 to -40 dB(maximum at full clockwise).

Warning: do not adjust LINE 2 TRANS ADJ potentiometer because the adjustment lowers DTMF dialing signal

amplitude.

Random noise: amplitude is programmable by using control software to –32 dBm. Random noise is added when line impairment condition is enabled. The factory default condition is –55 dBm with random noise value is 17.

Line Impairment conditions that may be selected with the control software are:

Circuit number 1: Ideal line, 3 dB insertion loss

Circuit number 2: signal attenuation only with 20 dB insertion loss

Circuit number 3: 20 dB insertion loss, frequency attenuation characteristics (note 1), and random noise

Circuit number 4: 20 dB insertion loss, frequency attenuation characteristics (note 1), random noise, and partial envelope delay distortion (note 2)

Circuit number 5: 20 dB insertion loss, frequency attenuation characteristics, random noise, and full envelope delay distortion (note 3)

Note 1: Frequency attenuation characteristic relative to 1 kHz

+12 dB +/- 1.5 dB @300 Hz
+8 dB +/- 2.0 dB @ 500 Hz

+8 dB +/- 1.5 dB @2.5 kHz

+12 dB +/- 1.5 dB @ 3 kHz

Above Band (>3 kHz): 80 dB/octave roll-off to 50 dB holding to 10 kHz

Below Bank (<300 Hz): 24 dB/octave roll-off

Note 2: partial envelope delay distortion with reference to 1.7 kHz

800-2600 Hz: 1250 micro second nominal

300-3000 Hz: 2000 micro second nominal at both band edges.

Note 3: full envelope delay distortion with reference to 1.7 kHz

800-2600 Hz: 1750 micro second nominal

300-3000 Hz: 3000 micro second nominal at both band edges.

RS232C interface: connector on front panel, 1200 baud, no parity, 1 stop bit

An interface cable to PC is provided.

Programming control software is provided in a disk.

Line Status Display: red LED for each line to indicate off-hook status (continuous on) or ringing status (blinking) on rear panel

Power Switch: on rear panel

Power On Indicator: green LED display on front panel

Power Requirements: 100-130 VAC, 50/60 Hz, 36 watts maximum.

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.

Weight: 3.5lbs. (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.

Control software is provided on a disk.