Details • Standard interface for 4 PSTN lines or other 3rd-party telephony devices • Allows outside callers to access a Gemini intercom system • Enables internal users to make and receive outside phone calls • Auto-answer • Manual-answer • Line Access from Intercom Panel s• Line Access from Other Gemini users with DTMF Capability Item Code 700-26-23 Technical Specifications Line Interference Number of channels: 4 per card, Max of 4 option cards per Gemini unit DSP channel usage: 4 DSP IP channels per card Signalling: Loop start or ground DTMF: DTMF detection for DDOI routing Bypass phone operation: Phone is switched out of circuit whenever FXO channel is in use Line Impedance: CTR21, 600R, 900R or Japan – software selectable Return loss: >18dB 300-400Hz Protection: FCC pt 68 type B longitudinal surge, 1500V: FCC pt 68 type B metallic surge, 800V Ring equivalency number: REN <0.2 Longitudinal balance: >60dB (200-1000Hz); 40dB (1000-4000Hz) Common mode rejection ratio (CMRR): On hook >70dB 50-500Hz Vcm=60Vrms; Off hook >40dB 50-500Hz Vcm=60Vrms Common mode overload level (CMOL): On hook >300Vrms 50-60Hz; Off hook >250Vrms 50-60Hz Max trip/ring voltage: 300V (Correct operation not implied) Recommended max 120V Max loop current: 90mA Ringing voltage – detect: Typically 22V, min 26V, 17-68Hz Ringing voltage – no detect: Typically 14V, max 18V, 1768Hz THD: <1% at 0dBm, 1kHz Crosstalk: <-85dB (inter-channel and inter-card) Insertion Loss: 0dB Nominal line TX level: -9dBm ± 1dB Input level adjustment: Via software –9dB to +12dB in steps of 1.5dB Output level adjustment: Via software –34.5dB to +12dB in steps of 1.5dB. Mute option Freq response: 300Hz – 3200Hz ± 2dB ref to 1kHz (8kHz sampling) Connectors Line: RJ11 2 pin modular jack socket Bypass Phone: 1 per channel (4) Phone connector pinout: Pin 3 – tip (B), Pin 4 – ring (A), other pins - unused Ringing Ring Cadence: US Ringtone Echo Suppression General: DSP Based adaptive filter providing acoustic & network suppression Tail length (acoustic): 63.5ms ERLE: 30dB typical Environmental Operating temperature range: 32° to 122°F (0 to 50°C) Storage temperature range: -4° to 140°F (-20° to 60°C) Operating humidity: 20 to 90% at 104°F/40°C non-condensing