Instruction manual

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L5. Call Decoder: The Call Decoder takes in the 3 wire BCD discretes from the 6 ACU’s and
converts them back into decimal (6) call discretes. The call discretes are wired to the
appropriate panels to signal that they are being called.
L6. ICS Summing Amplifier: The ICS Summing Amplifier takes in the audio from up to 6
other operating positions and sends the summed output back to the positions. The amplifier is
required to drive the 6 100 Ohm Cat 5E cables back to the ACP’s at the operating positions.
M. RF Filters. RF filters are used on all inputs and outputs to keep RF out of the audio circuits.
LC and RC filters are used providing over 30 dBs of attenuation to HF frequencies and above.