2 . T E C H N I C A L P A R A M Eters; Telephone Parameters; Other Parameters - 2N Helios User And Service Manual

12. Technical Parameters

Telephone Parameters

12.1.
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
Ringing impedance
Ringing detector sensitivity
Time of response to ringing
DTMF detector sensitivity
Dial tone detector sensitivity
Busy tone detection speed
Continuous tone detection speed
Ringing tone detection speed
Overvoltage protection – common mode
Overvoltage protection – between A, B

Other Parameters

12.2.
Switch – max. voltage
Switch – min., voltage
Switch – max. current
Backlight – rated voltage
Backlight – max. voltage
Backlight – current
Operational temperature
Dimensions (1 module)
Parameter
Return loss
Bandwidth
Pulse dialling
DTMF level
conductors
consumption
range
Coverage
Weight
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 kΩ
C = 1 μF
10 to 20 V
Variable
40 / 60 ms
-6 and -8 dB
± 2 dB
Min. -40 dB
Min. -40 dB
Variable
Variable
Variable
1000 V
1000 V
48 V AC, DC
9 V AC, DC
2 A AC, DC
12 V
24 V
up to 1 A
-20 to + 60 ºC
IP 53
210x100x29 mm (h x w x d)
up to 500 g
41
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
350 - 500 Hz
350 - 500 Hz
350 - 500 Hz
350 - 500 Hz
8 / 20 μs
8 / 20 μs