FXO Line Testing

The device can test the telephone lines connected to its FXO ports through SNMP using the SNMP acAnalogFxoLineTestTable table. The tests provide various line measurements. In addition to the tests, a keep-alive test is also done every 100 msec on each of the analog ports to detect communication problems with the analog equipment:

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Line Current (mA)

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Line Voltage (V)

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Hook (0 = on-hook; 1 = off-hook)

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Ring (0 - Off; 1 - On)

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Line Connected (0 = Disconnected; 1 = Connected)

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Polarity state (0 = Normal; 1 = Reversed, 2 = N\A)

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Line polarity (0 = Positive; 1 = Negative)

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Message Waiting Indication (0 = Off; 1 = On)

You can also view the above information through the Web interface (see Viewing Port Information).