● E1 Interface
Standard: comply with protocol G.703;
Rate: n*64Kbps±50ppm;
Line Code: HDB3;
E1 Impedance: 75Ω (unbalance), 120Ω (balance);
Jitter Performance: In accord with protocol G.742 and G.823
Input Port Attenuation Allowed: 0~6dBm
● FXS Phone Port
Ring voltage: 75V
Ring frequency: 25HZ
2-wire Impedance: 600 Ohm (off-hook)
Return loss: 40 dB
● FXO Trunk Port
Ring detection voltage: 35V
Ring detection frequency: 17HZ-60HZ
2-wire Impedance: 600 Ohm (off-hook)
Return loss: 40 dB
● EM 2/4 Wire
AD: 0dB
DA: 0dB
2/4-wire Impedance: 600 Ohm
Return loss: 20 dB
● Working Environment
Working temperature: -10°C ~ 50°C
Working Humidity: 5%~95 % (no condensation)
Storage temperature: -40°C ~ 80°C
Storage Humidity: 5%~95 % (no condensation)