25V COM GND Figure 1: Telephone Paging Amplifier Introduction This document describes the Lucent 250-watt Telephone Paging Amplifier.These are full-featured, wall-mounted amplifier that provides inputs for dry loop 600-ohm telephone page signal, background music source, and low impedance microphone. A set of control inputs allow an external contact closure to mute background music and open the telephone page channel.
Figure 2: Wall Mounting the Amplifier SCREW #8 x 5/8" (M4 x 16 mm) WITH TEFRON WASHER 1/8 x 5/16 (3 x 8 MM) TYP 4 PCS RACK MOUNTING SCREWS ARE NOT SUPPLIED Figure 3: Rack Mounting the Amplifier Installation Mounting The amplifier is designed for wall mount applications but can also be mounted in a standard 19"...
Tel page channel (see Figure 4). NOTE: In instances where the amplifier is to be placed permanently in the Tel page mode, a wire jumper must be installed between the TEL and COM terminals. Telephone Paging Amplifier Figure 4: Wiring for TEL Input MIC VOLUME...
22 AWG shielded, twisted pair speaker cable (Com Code: 401882956, PEC Code: 2734-SPK) will also work. When extending microphone cable, be sure to connect the shields of the microphone cable to the extension wire. Figure 5: Connect Microphone to Telephone Paging Amplifier MIC VOLUME TEL VOLUME...
Input Cover Replacement When all connections are made, remove an appropriate knockout on the input cover. Replace the cover and tighten the screws while dressing the wires through the knockout hole. TEL VOLUME LUCENT TECHNOLOGIES POWER PEAK LEVEL APHEX BRIDGING...
Output Wiring All output wiring connections are made to the terminal strip located under the right side access panel. Loosen the 2 Phillips-head screws on each side of the cover and remove the cover. IMPORTANT: Before making any connections or wiring changes to the amplifier or any equipment connected to the amplifier, make sure that the amplifier is NOT plugged into an AC outlet.
Figure 8 : LUWMT1A Connection to RCA Jack on Amplifier RCA Jack LUWMT1A Amplifier LUWMT1A Connector An RCA jack is provided near the output terminal strip for connection to an LUWMT1A impedance matching transformer (Com Code 405891680). A 600-ohm, telephone level output signal can be obtained by plugging the RCA connector of the LUWMT1A into this jack and taking the output signal off of the LUWMT1A screw terminals (see Figure 8).
Operation IMPORTANT: Before plugging the amplifier into an AC outlet, turn all volume controls to their full counterclockwise positions and all other controls to their reference position or to mid rotation. Indicators POWER IND The POWER IND LED illuminates whenever AC power is applied to the amplifier (there is no power switch on the amplifier).
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MUSIC VOLUME This control adjusts the level of the background music output. No reference level setting position is provided. The background music level should be set to an acceptable level without overdriving the system. When adjusting this level, the PEAK LEVEL indicator should be observed to ensure that the amplifier signal is not distorted.
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