6. Technical Parameters

Minimum line current

15 mA

off-hook

Minimum line voltage

22 V

on-hook

Off-hook DC voltage drop

< 9 V

< 12 V

I = 20 mA
I = 50 mA

On-hook resistance

>1 MΩ

U = 25..100 V

Off-hook impedance

220 Ω + 820 Ω paral. 115 nF

15 to 60 mA

Return loss

> 14 dB

15 to 60 mA

Bandwidth

300 to 3500 Hz

15 to 60 mA

Ringing impedance

> 2 kΩC = 0.47 μF

25 to 50 Hz

Ringing detector sensitivity

10 to 20 V

25 to 50 Hz

Pulse dialling

40 / 60 ms

DTMF dialling level

-9.0 +2.0/-2.5 dB and -11.0 dB +2.5/-2.0 dB

15 to 60 mA

Overvoltage protection – between A, B

1000 V

8 / 20 μs