INTEROPERABILITY NOW
4-1
4
Operation
4.1
General
This section contains information and instructions required for proper operation of the ARA-1.
4.2
Front Panel Indicators
All front panel indicator LEDs are explained below, starting at the left side of the unit. Refer to
Figure 2-2 for views of controls and connectors.
4.2.1
Power LED
The yellow Power LED is lit whenever DC power is applied to the unit.
4.2.2
Link Active LED
The green Link Active LED is illuminated whenever the ARA-1 has accepted a SIP invite or
when a SIP invite from the ARA-1 has been accepted. The LED goes out when the SIP call is
terminated.
4.2.3
Channel Active LED
The green Channel Active LED is lit whenever radio-side COR is active (the associated receiver
is unsquelched or the audio from the receiver has tripped the ARA-1 VOX function). This LED
also indicates that the ARA-1 is sending radio receive audio across the IP link.
4.2.4
Audio Input LED
The yellow Audio Input LED is provided as a visual aid in setting the proper input audio level
for optimal operation. See Section 2.8.3 for instructions.
4.3
ARA-1 Operation
Basic operation and control of the ARA-1 is discussed in this section. These instructions assume
the ARA-1 has already been correctly configured per Section 3.
4.3.1
Operation at Power-Up
When unit power is applied, all front panel LEDs will light for 10 to 15 seconds and then cycle
on and off, one after the other. During this time, the ARA-1 will register with a SIP Proxy server
if it has been configured to do so. Otherwise no action occurs and the unit will wait for the
initiation of an outgoing call (from the radio end) or an incoming call (from the SIP network).