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2.2.3 Maximum Data Rates
These are the maximum data rates as required by 61162-450, section 4.3.2:
Description
Maximum received per second, intended for target
Maximum received per second, not intended for target
Maximum received per second, not intended for target at 50% of the maximum load.
Table 5: Maximum Data Rates
2.3 Syslog Messages
When Syslog network logging is enabled, Syslog messages are sent to the network address specified in the web
interface (seeTable 6: Syslog Messages on page 20. Refer to the network settings for more information.
Message ID
SURV_AUDIO_FAILURE
SURV_LED_FAIL
SURV_WDOG_NOT_
FEEDING
Table 6: Syslog Messages
2.4 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 fog horn signal. A master device sends the data to the multicast
group at 239.192.0.65 on port 5004 and 5005. This audio packet stream is an 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 fog horn 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.
20 | Operation
Message text
Surveillance failed for audio
channels: <Mask>
Bad health state of LED <LED
id>
Not feeding watchdog
because all required tests
have not been passed:
<Mask>
Additional information
<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.
<LED id> is replaced with the ID of the LED that failed.
Message informing 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
Amount
50/sec
2000/sec
1000/sec
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