Tieline ViA User Manual page 156

156 ViA User Manual v2.0
The first four stages are observed in "auto" jitter buffer mode.
1. Stabilization period (a1): A few seconds at the start of a connection where no action is
taken at all while the establishment of a stable connection means analysis of jitter data is
not valid.
2. Stage 2 (a2): A compatibility check to ensure the RTP connection is compliant and RTP
clocks are synchronized enough to perform jitter analysis.
3. Stage 3 (a3): If the compatibility check is successful, this is the analysis hold-off period.
During a minute, the jitter buffer is held at a safe, fixed value of 500ms while enough history
is recorded to start jitter buffer adaptation.
4. Stage 4 "live" (A): This is where the codec determines it is safe enough to start
broadcasting using the auto-jitter buffer level. We recommend running the codec for a few
more minutes to obtain a more comprehensive history of the connection's characteristics.
5. Fixed (F): This state is displayed if the jitter buffer is fixed.
Configure the Jitter Buffer on the Answering Codec
Session data is exchanged when a Tieline codec dials another Tieline codec and this configures the
answering codec algorithm, bit-rate and jitter buffer etc. Depending on the capability of your network
infrastructure, you may want to independently configure the jitter buffer settings on the answering
codec. To do this:
1. Create a new answering program on the answering codec.
2. Configure preferred jitter buffer settings in this answering program.
3. Lock the answering program in the codec.
This ensures the answering program jitter buffer settings will be used when answering a call from a
Tieline codec.
Fixing Jitter Buffer Settings
The default jitter-buffer latency in Tieline codecs is 500 milliseconds. This is a very reliable setting
that will work for just about all connections. However, this is quite a long delay and we recommend
that when you set up an IP connection you test how low you can configure the jitter-buffer in your
codec before the broadcast.
1. Press the HOME
2. Tap Jitter Buffer to configure a fixed buffer setting in milliseconds (maximum 5000 ms).
button to return to the Home screen, then tap Dialer .
© Tieline Pty. Ltd. 2017