Cheap Telephone System Pbx WS824-M416 Intercom System for Hospital Pabx

Function Information

Power Supply

Power supply voltage: 110VAC or 220 VAC,50/60 Hz 

Maximum power consumption: 30W 
Cross-talk attenuation: >70db 
Internal feeding voltage: +28VDC, 30mA 
Internal ringing voltage:75VAC/50Hz 
External line port voltage: <60VDC 
External line port ringing voltage: 35VAC/25Hz or >35VAC/50Hz 

Enviromental Limits  

Operating temperatures: 0°C to 45°C (32°F to 113°F) 

Operating humidity: 10% to 95% without condensation 

Cable Requirement   

Feature phone: Maximum 100m(2 pairs twisted wire 0.5@) 

Single line phone: Maximum 1,000m(1 pair twisted wire 0.5@)

Outgoing call: DTMF 
Cross lose: > 70dBII