Telos Zephyr Xstream User Manual page 107

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IMPORTANT TIP!
When referring to Transmit modes we use the Term "Mono 64" to refer to a mono signal
using a single B channel. Therefore, the audio stream may be at 56 or 64kbps since the call
could be placed at either rate.
Similarly, we use the term "Mono 128" to refer to a mono signal using the bandwidth from
both B channels. Therefore, the audio stream would be at either 112 or 128kbps.
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COMPATIBILITY TIP!
The AAC and AAC-LD standards are new, and are not supported by older codecs. When
communicating with older equipment, you must make some other choice.
The G.722 transmit mode is the most widely supported standard. The majority of codecs
support this mode. Since it has the lowest delay, it is frequently used for return feeds and IFB.
Receive
This instructs your Zephyr Xstream to decode a particular mode being transmitted from the far‐
end codec.
The easiest option here is to set Receive to the "Auto" setting. This mode will attempt to
determine the mode being sent from the far end and internally set the Receive mode to match.
As the auto mode takes several seconds to determine the correct mode, generally, we
recommend that you use a specific setting for Receive. In this case, your receive mode must be
set to decode the stream being sent from the far end. You will need to know the Transmit
("Xmt" or "Encoder") mode of the far end to set this correctly.
For a detailed explanation of the options for this menu item, see Section 6 (Audio Coding
Reference) and Section 11 (Detailed Menu Reference).
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IMPORTANT TIP!
When referring to Receive modes we use the Term " 64" to refer to any incoming bit stream
using only a single B channel. The actual audio stream may be at 56 or 64kbps since the call
could be placed at either rate. Note that in nearly all cases a 56 or 64kbps signal will be
mono.
Similarly, we use the Term "128" to refer to any signal using the bandwidth from both B
channels. Therefore, the audio stream would be at either 112 or 128kbps.
The only exception is the G.722 and L3 Dual/Mono modes. These modes can receive one or
two L3 "Mono 64" data streams. When one of these modes is used, you may have 2 sites
connected simultaneously and independently to your Xstream.
USER'S MANUAL
Section 5: GUIDED TOUR of the MENUS 95