Line gain
Default: 0 dB
You can adjust the gain of the line input (0...22.5 dB) to adapt it to the signal level of the
source.
Loop Input to Output
Default: No
You can select Yes to route the Audio Input signal immediately to the local Audio Output. This
is typically done for testing. Acoustical feedback (howling) may occur if a microphone and a
loudspeaker are connected.
Pilot tone super. (Pilot Tone Supervision)
Default: No
When Pilot tone supervision is enabled, the presence of a 20 kHz pilot tone on audio input 2 is
supervised and the result is shown on the status page. That status is also incorporated in the
header of any audio stream transmitted. A receiving device can use this information to control
its own pilot tone output.
By regenerating the pilot tone at the output of the receiving device, a pilot tone can be
“transferred” from the input of the transmitter to the output of the receiver, even though the
audio channel itself does not have a 20 kHz audio bandwidth.
Audio Output
– Output level
Default: 0 dB
You can select the output signal level (0...-70 dB) here. Audio Output 2 may have a fixed
level 20 kHz pilot‑tone signal.
– Output delay
Default: 64 ms
The default 64 ms is a practical minimum value. You can change this audio buffer size
setting to adjust the delay before the received audio stream is played. A too low value
may cause dropouts in the audio signal depending on the quality of the network
connection. Higher delay values can be used with the purpose of acoustically aligning
loudspeakers connected to different IP Audio Interfaces, e.g. in tunnel applications.
The maximum delay that can be selected depends on the chosen audio coding format and
whether the audio stream is full duplex or not. A more efficient coding scheme, lower
sample rate and half duplex mode allows for a longer delay. For G.711 (u-Law or A-Law)
at 8 kHz sampling rate and half-duplex, the delay can be set up to approximately 8 s.
– Output level
Default: 0 dB
You can select the output signal level (0...-70 dB) here. Audio Output 2 may have a fixed
level 20 kHz pilot‑tone signal.
– Output delay
Default: 64 ms
The default 64 ms is a practical minimum value. You can change this audio buffer size
setting to adjust the delay before the received audio stream is played. A too low value
may cause dropouts in the audio signal depending on the quality of the network
connection. Higher delay values can be used with the purpose of acoustically aligning
loudspeakers connected to different IP Audio Interfaces, e.g. in tunnel applications.
IP Audio Interface
Configuration | en 25
Bosch Security Systems B.V. Operating Manual 2013.03 | V2.0 |
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