ARA-1 Operations Manual
INTEROPERABILITY NOW
3-17
3.4.2.4
COR Cadence Min Duration
The
COR Cadence Min Duration
setting is the minimum duration of the detected squelch break
before an individual COR pulse is recognized. This usually corresponds with the amount of time
the user must hold the PTT button depressed. This also specifies the minimum time that must
elapse before the next squelch break pulse begins (how long the PTT switch must remain
inactivated between presses).
The factory default setting of 100 milliseconds should work well with most systems. One way to
determine if a change is needed is to use
COR Cadence Prompts
to provide quick feedback. The
minimum duration can be reduced and/or the maximum duration can be extended if the ARA-1
does not always detect each of the squelch breaks attempted.
NOTE:
Do not be concerned if the explanation of COR Cadence setup
parameters seems overly complicated. The ability to modify the settings and the
information that explains them is provided for the rare circumstances where
changes are needed. The factory default settings provide considerable leeway
and will work well with most systems and most users. If you feel that the settings
are not working properly, it is easy to get feedback through the
COR Cadence
Prompts
feature.
3.4.2.5
COR Cadence Max Duration
A detected squelch break pulse and the delay between individual pulses can be no longer than
the set max duration. For a two-step cadence, the ARA-1 considers that any delay longer than
the
COR Cadence Max Duration
, but less than the
COR Cadence Digit Timeout
, is a pause
between the two steps.
The factory default setting of one-half second (500 milliseconds) should work well with most
systems. One way to determine if a change is needed is to use
COR Cadence Prompts
to provide
quick feedback. The minimum duration can be reduced and/or the maximum duration can be
extended if the ARA-1 does not always detect each of the squelch breaks attempted. The more
loosely the criteria are set, the more likely that the unit could false on noise-induced squelch
breaks.
3.4.2.6
COR Cadence Digit Timeout
Once the ARA-1 detects a squelched condition that exceeds the set
COR Cadence Digit Timeout
,
the unit will consider that the COR Cadence sequence is complete. For a two-step COR Cadence
sequence, this is the maximum time you can wait between squelch break pulses.
3.4.3
Automated Dialing Methods
In addition to the methods described above that allow a radio user to initiate a call, the ARA-1
also supports methods to automate the initiation of a call.
3.4.3.1
Power On Dialing
When the
Power On Dialing
setting is configured with a valid extension, SIP URI, or IP address,
the ARA-1 will automatically dial it at power up. If the ARA-1 is set to register with a SIP proxy,
it will not dial until after it has successfully registered.