2N Helios Vario, Installation Manual

Page: 68 / 74

68
2N TELEKOMUNIKACE a.s., www.2n.cz
®
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 kΩC = 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 to 500
Hz
Busy tone detection speed Variable
350 to 500
Hz
Continuous tone detection speed Variable
350 to 500
Hz
Ringing tone detection speed Variable
350 to 500
Hz
Overvoltage protection – common mode 1000 V 8/20 μs
Overvoltage protection – between A, B
conductors
1000 V 8/20 μs
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 : 14 V
Backlight – current consumption : Up to 1 A
Working temperature : −20 °C to +60 °C
Coverage : IP 53
Dimensions (1 module) : (210 × 100 × 29) mm
Weight : up to 500g