Silver Stream-In / Stream-Out - User Manual SR 1.0.4 – 10/2012
Page 50
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Main Menu – Status/Alarms Page (
continued
)
Audio Alarms Section
This section shows the status of the audio alarms. The alarms indicated in this section
are Silence Detections for Left and Right Input (Stream-In) or Output (Stream-Out) and
Sync alarm (on Stream-Out only).
1.
Audio Alarms (Silence Detection)
The Audio signal has decreased below the threshold and timeout specified in the audio
configuration menu. This alarm will be flagged if silence occurs on the inputs (Stream-In)
or on the outputs (Stream-Out) for any reason.
2.
Sync Failure (AutoSync Alarm) – Stream-Out only
This Alarm indicates a general sync failure in situation where an excessive amount of
packets were dropped or out-of-sequence that results in a gap to the audio stream sig-
nificant enough to generate the Sync alarm. The different audio algorithms or linear PCM
have their specific sync-failure sensitivity.
For Enhanced apt-X this alarm corresponds to the AutoSync Alarm. AutoSync is a bit pat-
tern sent embedded in the Enhanced apt-X audio stream that allows a very rapid re-
sumption of decoding after a gap in the bit stream. This alarm will be flagged if the fol-
lowing conditions occur (for network faults, usually along with other network specific
alarms too):
- Mismatch of audio algorithms on Transmit and Receive units
- Connection or transport errors
- A Call being dropped by the Transmit unit
Transport Alarms
This section covers IP alarms only such as IP Rx or Tx errors and audio mismatch.
1.
IP Tx Error – Stream-In
The packets from the Tx unit have not been confirmed as hitting the Rx unit – either the
Rx unit is stating in its RTCP stream that there has been no packets, the RTCP port has
been blocked, or there is another form of network fault resulting in no line of sight to the
Rx codec.
2.
IP Rx Error – Stream-Out
Packets are not arriving to the Decoder, and it is expecting to see traffic. This can be
caused by stream being dropped on the Encoder, a network fault or mismatch in audio
algorithm settings.
3.
Audio Mismatch
This is likely to be raised if the algorithm does not match on both sides of the link.
Connection Alarm (ETH)
Physical loss of connection to network directly (lead pulled)
