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 > 5MΩ
100-200 V DC > 30 KΩ
500V AC/50Hz > 20KΩ
100V AC/25Hz > 100KΩ
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/350Ω
Impedance (off-hook) 300-3400Hz 500-700Ω
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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