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12. Technical Parameters
12.1. Telephone Parameters
Parameter
Value Conditions
Minimum required off-hook line current
15 mA Off-hook
Minimum required on-hook line voltage
20 V Hang-up
DC voltage drop (off-hook) < 8 V
< 16 V
I = 25 mA
I = 50 mA
Lead current while hang-up
< 25 μA U = 60 V
Off-hook AC impedance 220 Ω + 820 Ω
115 nF parallel
20 to 60 mA
Return loss
> 10 dB 20 to 60 mA
Bandwidth 300 to 3500 Hz 20 to 60 mA
Ringing impedance > 2 kΩ
C = 1 μF
25 to 50 Hz
Ringing detector sensitivity
10 to 20 V 25 to 50 Hz
Time of response to ringing Variable
Pulse dialling 40 / 60 ms 20 to 60 mA
DTMF level -6 and -8 dB
± 2 dB
20 to 60 mA
DTMF detector sensitivity Min. -40 dB 20 to 60 mA
Dial tone detector sensitivity Min. -40 dB 350 - 500 Hz
Busy tone detection speed Variable 350 - 500 Hz
Continuous tone detection speed Variable 350 - 500 Hz
Ringing tone detection speed Variable 350 - 500 Hz
Overvoltage protection – common mode 1000 V 8 / 20 μs
Overvoltage protection – between A, B
conductors
1000 V 8 / 20 μs
12.2. Other Parameters
Switch – max. voltage 48 V AC, DC
Switch – min., voltage 9 V AC, DC
Switch – max. current 2 A AC, DC
Backlight – rated voltage 12 V
Backlight – max. voltage 24 V
Backlight – current
consumption
up to 1 A
Operational temperature
range
-20 to + 60 ºC
Coverage
IP 53
Dimensions (1 module)
210x100x29 mm (h x w x d)
Weight
up to 500 g
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