Specifications | 247
Signalling
Pulse dialing Transparent decadic signalling at 7 - 14 PPS with break
period limits of 60 - 73 %
Pulse distortion 4:1 multiplexed < 2.250 ms
Non-multiplexed
≤ 250 µs
Reversals Line polarity reversal detection
Metering level sensitivity 12 kHz / 16 kHz billing tone detection with a selectable level
sensitivity of -17dBm to -40 dBm in 1dB steps into 200
(60 mV rms to 5 mV rms into 200 ).
Metering level maximum The maximum level of metering signal the DFXO can tolerate
without voice band interference is 0.8 Vrms into 200 .
Loop resistance on-hook >1 M
Ringing detection threshold Options of 16 Vrms, 26 Vrms or 49 Vrms
Ringing detection frequency 15 to 50 Hz sine wave
Ringing input impedance Option of >10 M or 30k
Ringing DC offset range
tolerance
0 to -75VDC
Ringing input voltage
maximum
up to 100 Vrms
Physical
Physical interface Dual RJ-45 per port (1 line port, 1 monitor port)
Diagnostics
Green LED On: Normal operation
Solid: Off-hook
Flashing: Ringing
Yellow LED On: Alarm
Flashing: Loopback
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