4. Specifications
Power supply (external)
12V DC 1.6A (supplied with unit)
Line voltage
24-72V DC
DC leakage
< 10
μA
On-hook insulation
(resistance between line
terminal and ground)
0-100V DC > 5M
Ω
100-200 V DC > 30 K
Ω
500V AC/50Hz > 20K
Ω
100V AC/25Hz > 100K
Ω
Ring capacitor
0.47
μF
±10%
On-hook impedance
@50V DC, 40V AC/25Hz>3000
Ω
Ring detect
27-100 V AC/16-60 Hz
DC resistance (off-hook)
24-66V DC @ 20-100mA/350
Ω
Impedance (off-hook)
300-3400Hz 500-700
Ω
Imbalance ratio
300-3400Hz > 46dB
Return loss
300-3400Hz > 18dB
Current during break
< 700
μA
DTMF transmission frequency tolerance:
frequency level (high)
frequency level (low)
±1.5% -6 to –8dBm
-8 to –10dBm
Inter-digit pause time
70-80ms
Relay switching current
2A max
Dimensions outdoor unit
19.4cm x 10.2cm/7.6inch x 4.0inch
Dimensions indoor unit
18.5cm x 9.5cm/7.3inch x 9.5inch
Operating temperature outdoor
-20ºC to +50ºC/4ºF to 122ºF
Operating temperature indoor
0ºC to +35ºC/32ºF to 95º
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