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User Manual
8300 MkII Sound Reception System
5.3 Syslog Messages
When syslog network logging is enabled, syslog messages are sent to the network address specified in the web interface.
Refer to the network settings for more information.
The following table lists messages that are sent when there is a problem with the unit.
Message ID
Message Text
Additional Information
SURV_AUDIO_FAILURE
Surveillance failed for audio
channels: <Mask>
<Mask> is replaced with a bitmask in hex of
the channels that have failed audio surveillance.
Available channels:
•
0x1 Fore
•
0x2 Aft
•
0x4 Starboard
•
0x8 Port
For example, 0xC indicates a failure of port and
starboard microphones.
SURV_LED_FAIL
Bad health state of LED <LED id>
<LED id> is replaced with the ID of the LED that
failed.
SURV_WDOG_NOT_ FEEDING
Not feeding watchdog because
all required tests have not been
passed: <Mask>
Message informs that the unit will restart due to a
failing watchdog test. <Mask> is replaced with a
bitmask in hex that identifies the failing test. Tests
include:
•
0x1 Audio surveillance test
•
0x2 DSP surveillance test
•
0x4 Display response surveillance test
5.4 Audio Packet Stream
A proprietary audio packet stream is sent together with all other network traffic.
This stream contains the audio data from a detected foghorn signal. The master unit sends the data to the multicast group at
239.192.0.65 on port 5004 and 5005. This audio packet stream is a RTP stream with RTP data on port 5004 and RTCP data on
port 5005. The audio is sent as a single channel 24-bit signed PCM at a 24-kHz sampling rate. The RTP stream uses a packet
size of 20 ms.
An audio stream is only sent when a foghorn is detected and stops when the detection ends.
The maximum bandwidth used by this stream is 96 kB/s, with approximately 50 packets per second.
