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The SPS325 is a general purpose amplifier intended for use with telecommunication equipment. It can bridge a telephone tip and ring line. It's input includes direct current blocking and is ring tolerant.
Two LED’s are located on the front of the SPS325. The ON LED indicates the presence of 24vdc power. The SIGNAL LED indicates the presence of audio.
Power and signal are connected through an RJ14 modular jack on the back of the SPS325. A modular cord, power cord, jack block, and power supply are included with the SPS325.
 Show the wiring illustration. |
Connect the power cord to the terminals marked COM and +24V on the power supply.
Connect the other end of the power cord to pair 2 (marked YL and BK) on the jack block. The polarity does not matter.
Connect your input signal wire to pair 1 (marked GR and RD) on the jack block.
Connect one end of the modular cord to the jack block, and the other end to the jack on the SPS325.
Plug the power supply into a 120v 60hz wall outlet. Rotate the volume control clockwise to turn on the power. The green ON LED will illuminate. The yellow SIGNAL LED will illuminate and follow the strength of the audio signal if one is present. Continue rotating the volume control clockwise to increase the output level.
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