INPUT MODULES   MIC1X - Microphone Transformer- Balanced (XLR) * Gain/Trim control * Bass & Treble controls * Noise gate w/ Threshold & Duration control * Limiter w/Threshold control * 24V Phantom power * Mute send & receive * XLR connector MIC1S - Microphone Transformer-Balanced (Screw Terminal) * Gain/Trim control * Bass & Treble controls * Noise gate w/ Threshold & Duration control * Limiter w/Threshold control * 24V Phantom power * Mute send & receive * Screw terminals       MIC2X - Microphone Electronic- Balanced (XLR) * Gain/Trim control * Hi-Cut/Lo-Cut controls * Voice Enhancement control * Noise gate w/Threshold control * Limiter w/Threshold control * 24V Phantom power * XLR connector MIC2S - Microphone Electronic- Balanced (Screw Terminal) * Gain/Trim control * Hi-Cut/Lo-Cut controls * Voice Enhancement control * Noise gate w/ Threshold control * Limiter w/Threshold control * 24V Phantom power * Screw terminals     MAX1R - Mono Auxiliary * Unbalanced input module * Gain/Trim control * Bass & Treble controls * Variable ducking level when muted * Fade back from mute * RCA connector SAX1R - Stereo Auxiliary * Unbalanced input module * Gain/Trim control * Bass & Treble controls * Variable ducking level when muted * Fade back from mute * Stereo-to-mono summing option * RCA connectors       TBL1S - Transformer Balanced Auxiliary * Transformer-isolated line level input * Gain/Trim control * Bass & Treble controls * Variable ducking level when muted * Fade back from mute * Screw terminals TEL1S - Telephone * Loop start or ground start trunk interfacing (requires external power supply) * Dry loop interface for paging ports * Audio-activated paging in dry loop * Gain/Trim control * Noise gate * Limiter * Screw terminals     TNG1S - Tone Generator * Select 4 of 8 tones to trigger * Burst/steady, slow whoop, siren, mechanical bell, Klaxon, night ringer, double chime, & doorbell tones * Momentary & continuous playback modes * Screw terminal trigger connections * Level control * Microprocessor-controlled operation * Screw terminals BRG1R - Bridging * Gain/Trim control * Ground isolated input * Input signal available at buffered output * Variable ducking level when muted * Fade back from mute * Buffered output not muted * RCA connectors
BAL2S - Dual-Balanced * Stereo, high-impedance, balanced inputs * Professional-quality, low noise performance * Selectable gain of 0 or 18 dB * Compatible with telephone system page ports * Variable ducking level when muted * Fade back from mute * Screw terminals SIGNAL- PROCESSING OUTPUT MODULES     ANS1R - Ambient Noise Sensor * Maximum gain control * Ramp speed * Activity threshold control * AUX level input control * Stereo unbalanced Aux inputs (electronically summed mono) * Connect up to 4 sensor mics (1 included) * RCA connectors CMP1R - Compressor/Limiter * Compressor ratio control * Threshold control * Make-up gain control * Bypass switch * Unbalanced input * Gradual fade back from mute for unbalanced input * RCA connectors                                                                   PEQ1R- Parametric Equalizer * Unbalanced input * 4-band equalizer; 2 full parametric bands * Frequency control * 'Q' bandwidth & gain controls * Bass & Treble controls * Bypass switch * RCA connectors RIO1S - Relay Input/Output * Transformer-isolated, balanced line-level input * 600-ohm or 10k jumper selectable input impedance * Transformer-isolated, balanced line-level output * 8-ohm, 750mW output * Input & output level controls * N.O. or N.C. relay contacts * Screw terminals