Tieline Merlin PLUS User Manual page 275

2. Stage 2 (a2): A compatibility check occurs.
3. Stage 3 (a3): An analysis hold-off period during which the jitter buffer is held at a safe, fixed
value of 500ms while enough history is recorded before starting jitter buffer adaptation.
4. Stage 4 "live" (A): The auto-jitter buffer is engaged. 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 setting 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 set the jitter-buffer in your codec.
1. Press the HOME
2. Use the navigation buttons on the front panel to select Connect and press the
3. Select IP and press the
4. Select your preferred IP Session mode and press the
5. Use the down
6. Navigate to Jitter Buffer and press
7. Select Fixed Buffer Level and press
8. Use the numeric KEYPAD to enter the fixed buffer value in milliseconds and press
If you change the jitter buffer setting in a codec it will only adjust to the new level when link quality is
high (e.g. above 70%). This is done to ensure audio quality is not compromised. When manually
configuring the jitter-buffer delay in a codec it is necessary to think carefully about the type of
connection you will be using. Following is a table displaying rule of thumb settings for programming
jitter-buffer delays into your codec.
© Tieline Pty. Ltd. 2017
button to return to the Home screen.
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navigation button to select Setup and press the
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Merlin PLUS User Manual v2.0
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