Telephone-Line
Boosters, Micro Seven's model LS15-A3 and LS15-A4
INTRODUCTION
Micro
Seven's Telephone Line Boosters, models LS15-A3 and LS15-A4 provide isolation
between two telephone lines with higher loop current, higher loop voltage, and
powerful ring signal (only for LS15-A3). When PBX equipment does not have
capability to drive long distance telephone cables to telephones, modems, and
fax machines because of lower loop voltage and low-power ring signal, models
LS15-A3 and LS15-A4 are inserted at PBX equipment. There are two RJ11-C
connectors on LS15-A3 and LS15-A4. The line 1 is connected to CPE, and line 2
is connected to PBX.
The
models LS15-A3 and A4 are operated by different types of AC/DC adapters. A 220V
version of AC/DC adapter is available as an option for LS15-A3. The LS15-A3 and
-A4 are caller-ID compatible so that caller-ID data is passed to CPE.
SPECIFICATIONS
Dialing
from Line 1 (CPE interface) to Line 2 (PBX interface):
Rotary-pulse and DTMF dialing
Input
characteristics at PBX (Line 2):
Input impedance at 1 k Hz: 600 ohms
Signal Bandwidth: 300 HZ to 3 k HZ
Signal Range: -45 to +5 dBm
Component: Telephone coupling transformer, relay, and
optical-coupler
Battery-feed
voltage (loop voltage) at Line 1, CPE interface: -42 volts nominal
Loop current at Line 1 (CPE interface): 25 mA
Ring Signal at Line 1 (CPE
interface):
LS15-A3: 20 +/- 2% Hz sine wave. 250 Volt peak-to-peak with
source resistor of 1.6k ohm
Note: model LS15-A4 passes same ring signal from Line 2 (PBX
interface) to Line 1 (CPE interface).
Line Input
Jacks for Line 1 and 2: USOC-RJ11-C, standard modular phone jacks
Power
Switch: on when the switch is pushed in, off when the switch is
pushed out.
Power
Indicator: green LED display
AC/DC
Adapter: 117VAC +/- 5%, or 230VAC +/- 5%(for optional 230V AC/DC Adapter
available for LS15-A3). Models LS15-A3 and LS15-A4 use different types of AC/DC
adapters.
DC input
for LS15-A3: 12VDC unregulated, 800mA maximum
DC input for LS15-A4: 48VDC unregulated, 150 mA
maximum
Caller-ID compatibility: Caller-ID signal that is
received from PBX side is passed to CPE side for both Bellcore and ETS modes.
Line
Status Display for Line 1 (CPE interface) and Line 2 (PBX interface): red LED
for each line to indicate off-hook status (continuous on) or ringing status
(blinking). There is no blinking LED display for model LS15-A4 at Line 1.
Calibration: not
required
Dimensions: 19 cm
(4") W x 4.5 cm (1.75") H x 10 cm (7.5") L
Weight: 400g (0.8 lbs.)
Environmental: Operating
temperature: 0 to 40 degree C, Humidity: 85% RH at 40 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.
Options
and Accessories:
230V input AC/DC Adapter (117V input unit is a standard.)
Country of
Origin: Manufactured in United States of America
Front-panel
Description
The front panel of LS15-A3 or A4 is shown in Figure 3-1.
1. J1 (RJ11-C): Line 1 Input Jack for connection to CPE
2. Line 1 OH/BUSY
Indicator: LED to indicate "Off Hook" status or "Line busy" condition. It
blinks when it is ringing.
3. J2 (RJ11-C): Line
2 Input Jack for connection to PBX
4. Line 2 OH/BUSY
Indicator: steady LED on to indicate continuous loop current. It blinks when it
receives ring signal.
5. Power ON (when
the switch is in.) or OFF (when the switch is out).
6.Power LED: on when the power is on.
Figure
3-1 Front Panel of LS15-A3 and LS15-A4
Rear Panel Description
The rear panel of LS15-A3 is shown in Figure 3-2. Connect
AC/DC Adapter or Car Battery Adapter to a DC Input connector on the rear panel.
The rear panel of LS15-A4 shows power input requirement of 48V DC input, 150
max.
Figure
3-2 Rear Panel of LS15-A3