Tieline Bridge-IT XTRA, Руководство пользователя

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170 Bridge-IT XTRA Manual
© Tieline Pty. Ltd. 2015
connection you will be using. Following is a table displaying rule of thumb settings for configuring
jitter-buffer delays into your codec.
Connection Jitter-Buffer Recommendation
Private LAN 60 milliseconds
Local 100 - 200 milliseconds
National 100 - 300 milliseconds
International 100 – 400 milliseconds
Wireless Network 250 - 750 milliseconds
Satellite IP 500 - 999 milliseconds
Important Note: The preceding table assumes Tieline Music is the algorithm in use. Do not
use PCM (uncompressed) audio over highly contended DSL/ADSL connections without
enough bandwidth to support the high connection bit-rates required.
19.4 Configuring Forward Error Correction
Forward Error Correction (FEC) is designed to increase the stability of UDP/IP connections in the
event that data packets are lost. FEC works by sending a secondary stream of audio packets over
a connection so that if your primary audio stream packets are lost or corrupted, then packets from
the secondary stream can be substituted to replace them. The amount of FEC required depends on
the number of data packets lost over the IP connection.
Both the local and remote codec FEC settings can be configured in the codec before dialing. These
settings can also be changed ‘on the run’ while the codecs are connected. FEC should only be
used if link quality displayed on the codec is below
S:99 R:99 , as it is of no benefit otherwise.
Configuring FEC into the Codec
1. Press the HOME button to return to the Home screen.
2. Use the navigation buttons on the front panel to select Connect and press the button.
3. Select IP and press the button.
4. Select Tieline and press the button.
5. Use the down navigation button to select Setup and press the button.
6. Navigate to FEC and press .
7. Select the local codec FEC setting in the Local FEC screen and press .
8. Select the remote codec FEC setting in the Remote FEC screen and press .
9. Check that the settings are correct in the RTP Settings screen.
The four FEC settings in Tieline codecs are outlined in the following table with their bit rate ratios.