Details Gooseneck microphone connector with VOX circuitry Talk/Listen from headset mic, telephone handset or push-to-talk microphone Four modes of operation that are internally programmable via dip switches Balanced local program input with separate level control Visual and audible call signaling Optional 4-wire daughter board for flexibility Wall or console mountable, or optional V-Box for portable or desktop use Built-in speaker Item Code KB-702GM Technical Specifications Panel Microphone Input Input Type: Electret Input Impedance: >=2K Mic Limiter Threshold: -2dBu ±3dB Mic Limiter Range: >= 15dB Headset Microphone Input Input Type: Dynamic Input Impedance: >= 1K Mic Limiter Threshold: -2dBu ± 3dB Mic Limiter Range: >= 15dB Program Line Input Maximum Level before Clipping: >= 20dBu Input Impedance: >= 5K Headset Output Load Impedance: >= 8 Output Impedance: <= 25 Output Limiter Threshold: +5dBu ± 3dB Maximum Output Level before Distortion: >= 17dBu Speaker Output Load Impedance: >= 4 Max Output Level before 1% Distortion: 20dBu ± 2dBu Partyline Output Off Noise: < -74dBu Output Impedance: >10K Partyline Input Crosstalk: < -60dB Max level before Clipping: >= 12dBu Sidetone Null Capability: > 25dB Frequency Response Panel Mic - Partyline: 300 - 16kHz ± 3dB Mic - Partyline: 300 - 15kHz ± 3dB Program Input - Headset Out: 200 - 18kHz ± 3dB Program Input - Speaker Out: 200 - 18kHz ± 3dB Partyline- Headset Out: 200 - 18kHz ± 3dB Partyline- Speaker Out: 200 - 18kHz ± 3dB Max Distortion Panel Mic - Partyline: <= 0.5% Headset Mic - Partyline: <= 0.5% Program Input - Headset Out: <= 0.2% Program Input - Speaker Out: <= 0.5% Partyline- Headset Out: <= 0.2% Partyline - Speaker Out: <= 0.5% Noise Panel Mic - Partyline: < -65dBu Headset Mic - Partyline: < -70dBu Program Input - Headset Out: < -60dBu Program Input - Speaker Out: < -60dBu Partyline - Headset Out: < -50dBu Partyline- Speaker Out: < -50dBu Max Gain Panel Mic - Partyline: >= 37dB Headset Mic - Partyline: 41dB ± 2dB Program Input - Headset Out: >= 18dB Program Input - Speaker Out: >= 24dB Partyline- Headset Out: >= 34dB Partyline- Speaker Out: >= 40dB Power Input Voltage Range: 20-30V DC Input Current (Idle): <= 90mA Input Current (Max): <=110mA Internal Adjustments and Connections Intercom: Line Five terminal connector Program Input: Three terminal connector Option Switches: Three DIP switches Call Signal Jumper 3: Three sets of options jumpers Call Alert Tone Level Control: Level adjustment control Environmental 32 - 122°F (0 - 50°C) Dimensions 4.5 x 8.25 x 1.75in (HxWxD) (114 x 210 x 44mm) Weight 1.1lbs (0.50kg)