ARA-1 Operations Manual
3-16
INTEROPERABILITY NOW
the ARA-1. These pulses are also called
Squelch Breaks
. To minimize the possibility of falsing
on random noise, pulses that fall out of a specified duration are ignored by the ARA-1.
NOTE:
This method only works if:
(1) The radio cabled to the ARA-1 has a COR Output signal that is connected to
the ARA-
1’s COR Input pin. The COR signal line must be properly configured via
the
Radio Settings
page (Figure 3-5).
(2) The radio PTT has full control of the transmit function of the radio. This means
that whenever the PTT switch is pressed, the radio is transmitting, and it is not
transmitting at any other time. Full control is not available with most trunking
systems. When the PTT switch is initially depressed, the trunking controller
function has temporary control of when the radio is actually transmitting a carrier.
3.4.2.1
COR Cadence
In the
COR Cadence
field, enter a one or two-digit number. For a single-step cadence, enter a
single number between
2
and
9
. This number will specify how many times the radio user must
depress the PTT input “key clicks” to trigger the call initiation. For a two-step cadence, enter a
pair of digits. For example,
35
means that the COR Cadence is made up of three key clicks
followed by a pause, and then completed by five more key clicks. The key clicks must match the
criteria specified in the
COR Cadence Min Duration
,
COR Cadence Max Duration
, and
COR
Cadence Digit Timeout
fields.
In the
Number To Dial
field, enter the SIP Extension or IP address of the end-user device that
you want to call whenever this COR Cadence is detected. Be sure to also add the cadence that
you will use to terminate the call in the
Disconnect
field. This cadence must be different from
any listed
Number To Dial
cadence.
3.4.2.2
Call Progress Prompts
The ARA-1 provides voice prompts (automated voice messages) that allow the radio user to keep
track of the progress of the call (
connecting, disconnecting,
etc.). The factory default setting is
Enable
; if you do not want these prompts transmitted over the radio, set to
Disable
. This function
operates with both the DTMF and the COR Cadence call initiation modes.
3.4.2.3
COR Cadence Prompts
The ARA-1 also provides voice prompting (automated voice messages) during the COR Cadence
call initiation process. Whenever the ARA-1 detects one of the COR Cadences specified in the
COR Cadence
fields, a verification prompt is transmitted. For example, if the COR Cadence is
six squelch breaks in a row, the voice message prompt will be the word
six
. If the COR Cadence
is three squelch breaks followed by five more, the voice messages will occur after each portion
of the sequence, that is two prompts, the word
three
and then the word
five
.
Set this option to
Disable
if you do not want these prompts to be transmitted.