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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 5: GUIDED TOUR of the MENUS 95

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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se

veral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Trans

mit

(“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.

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