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NexLog Recorder User Manual v2.2.0
indicate if the phone is on- or off-hook; the Min and Max will show the highest
(on-hook) and lowest (off-hook) voltages seen by the channel input. If the
current value fluctuates over a wide range when you are not using the
telephone, it probably means that the line is very noisy. This information can
help you set the TRV Thrsh value or diagnose problems such as spurious calls.
This setting is only available for analog channels.
Activity Timeout:
Timeout value in seconds. When set, alert #3001 (“Channel
was active for more than X seconds”) is issued if a channel is continuously
active for longer than the timeout value. The factory default is to disable this
function. This setting does not affect the actual recording of the call. It simply
issues an alert.
Activity Timeout is useful for calling attention to open or defective telephone
circuits. When a channel is set for TRV detection, a LOW voltage activates it. If
the circuit is open due to a broken wire, the voltage will always be LOW, and the
recorder will issue an alert if this condition persists. If you are going to use this
feature, then you should set this value to one that is longer than any reasonably
expected call or message to avoid nuisance alerts.
Inactivity Timeout:
Timeout value in seconds. When set, alert #3002 (“Channel
was inactive for more than X seconds”) is issued if there is no activity on the
channel for longer than the timeout value. The factory default is to disable this
function.
This setting does not affect the actual recording of the call. It simply issues an
alert.
Inactivity Timeout is useful for alerting you to circuits that should have signals
but do not. If you are monitoring a radio channel and the radio is turned off, the
inactivity timeout will eventually call this to your attention. Likewise, an unused
(but active and paid-for) telephone line can be identified with this feature. Of
course, legitimate inactivity can span weekends and holiday periods. Setting
periods too short can result in nuisance alerts.
GPIO Pin:
Specifies a value indicating the input pin pair on the GPIO board that
is used for triggering recording to start or stop. (This field is used with the detect
GPIO setting.)
For the NI PCI-6503 24-channel GPIO board, values are as follows:
0: specifies pin pairs 47+48 (PA0)
1: specifies pin pairs 45+46 (PA1)
2: specifies pin pairs 43+44 (PA2)
3: specifies pin pairs 41+42 (PA3)
4: specifies pin pairs 39+40 (PA4)
5: specifies pin pairs 37+38 (PA5)
6: specifies pin pairs 35+36 (PA6)
7: specifies pin pairs 33+34 (PA7)
8: specifies pin pairs 7+8 (PC4)
9: specifies pin pairs 5+6 (PC5)
