Technical Parameters - 2N Helios Uni Installation Manual

4. Technical Parameters

Telephone Parameters
Parameters
Minimum required off-hook line current
Minimum required on-hook line voltage
DC voltage drop (off-hook)
Lead current while hang-up
Off-hook AC impedance
Return loss
Bandwidth
Ringing impedance
Ringing detector sensitivity
Time of response to ringing
Pulse dialling
DTMF level
DTMF detector sensitivity
Dial tone detector sensitivity
CIE-Group Ltd, www.cie-group.com
Value
15 mA
20 V
< 8 V < 16 V
< 25 μA
220 Ω + 820 Ω 115 nF parallel
> 10 dB
300 to 3500 Hz
> 2 kΩC = 1 μF
10 to 20 V
Variable
40/60 ms
−6 and −8 dB ±2 dB
Min. −40 dB
Min. −40 dB
Conditions
Off-hook
Hang-up
I = 25 mA
I = 50 mA
U = 60 V
20 to 60 mA
20 to 60 mA
20 to 60 mA
25 to 50 Hz
25 to 50 Hz
20 to 60 mA
20 to 60 mA
20 to 60 mA
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