Telos Zephyr Xstream - Manual (Page 90)

USER’S MANUAL
Section 4: BASIC OPERATION & INSTALLATION 78
If you choose not to use the "Auto" setting, you will need to know the Transmit (“Xmt” or
“Encoder”) mode of the far end to determine the correct setting.
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HOT TIP!
You can determine the correct setting for the Receive mode by first using the Auto mode. Once
the Xstream gets a receive lock simply press the <CODEC> button and check what Receive
mode was found. Then press <CODEC> again and change the Receive selection to this
option.
For a detailed explanation of the options for this menu item, see Section 5 (Guided Tour of the
Menus). Section 6 (Audio Coding Reference) provides additional information about the features
and advantages of each the different transmission schemes.
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IMPORTANT TIP!
It is important to understand that the Transmit and Receive settings on two connected units
may very well NOT match. This is because there are frequently times when it is appropriate
to use a different coding mode coming versus going.
The important thing to remember is that the local Transmit mode must be compatible with the
Receive settings and capabilities of the far end unit.
Whereas the local Receive mode must be compatible with the Transmit settings of the far
end unit.
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COMPATIBILITY TIP!
Some brands of codecs have proprietary protocols implemented. These codecs require that
they be placed in "Independent mode" or bi-directional communication with ISO/MPEG
compliant codecs is not possible.
Bit Rate
This setting determines the per‐channel bit rated used for digital audio transmission. This
setting sets up the codec section and tells the ISDN interface what rate call to place the call over
the network.
This parameter must be matched between the Zephyr and the far end codec(s).