2N Lift emergency phone 2N SingleTalk - Manual, 1514 v6.3.0 - Manual (Page 67)

Technical parameters 5.1
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5.1 Technical parameters
Electric Parameters
Parameter Value Conditions
Minimal off-hook line current 15 mA Off-hook
Minimal on-hook line voltage 22 V Off-hook
DC voltage drop (off-hook)
< 8 V
< 16 V
I = 25 mA
I = 50 mA
Off-hook resistance >1MΩ U = 25..100 V
Off-hook AC impedance 220 Ω + 820
Ω paral. 115
nF
20 to 60 mA
Return loss > 14 dB 20 to 60 mA
Bandwidth 300 to 3500
Hz
20 to 60 mA
Ringing impedance > 2 kΩ
C = 0.47 μF
25 to 50 Hz
Ringing detector sensitivity 10 to 20 V 25 to 50 Hz
Pulse dialing 40 / 60 ms
DTMF dialing level -9.0 +2.0/-2.5
dB a
-11.0 dB
+2.5/-2.0 dB
20 to 60 mA
Overvoltage protection – between A,
B
1000 V 8 / 20 μs
Notes:
1) Whichever ringing form is accepted.
Switch Parameters
Minimum voltage 9 V AC or DC
Maximum voltage 24 V AC or DC
Maximum current 1 A AC or DC
Resistance – breaking min. 400 kΩ
Resistance – closing cca 0,5 Ω
Fuse resettable