Best price pabx telephone system for small business

Main Functions: 

1.Outgoing message(3 sections 30S)

2.Hot-call dialing

3.IP Econnomical Routing.

4.Accompany password.

5.Double mode switch.

6.Interrupt,disconnect a call 

7.Do-not-Disturb.

8.Call forward.

CABLE REQUIREMENTS  

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  

 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 

 ENVIRONMENTAL LIMITS  
Operating temperatures: 0°C to 45°C (32°F to 113°F) 
Operating humidity: 10% to 95% without condensation