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Prima LT USERS GUIDE

6-176-17

6.1.4.3 Decoder Line Format

The available decoder line formats depend on the algorithm selected.

For G.722, the only available line formats are Single Line (1 Ln)

Independent Mono (Ind. Mono). For normal operation, select 1 Ln, and

for use when connecting to two different far-end encoders, use Ind.

Mono. If single line is selected, you must enter which line (1 or 2) you

will be framing (connecting) to. If independent mono is selected, you

must enter which lines to use for the left and right channels.

When using any MPEG algorithm, Single Line and Dual Line (CCS 2 Ln)

modes are available. The Single Line mode supports all allowed bit

rates only when using a non-terminal adapter type digital interface,

otherwise, only 56 and 64 kb/s is supported. The Dual Line mode

supports only 112 and 128 kb/s bit rates.

Select the line format at the Line Fmt prompt or use the DLI command

from a terminal.

6.1.4.4 Decoder Bit Rate

Under most circumstances, the combination of encoder bit rate, decoder

algorithm and line format will determine the decoder bit rate. The only

exception is when the 1-line decoder line format is selected and a non-

terminal adapter digital interface is used. If this is the case, select the

appropriate bit rate at the Bit Rate prompt or use the DBR command

from a terminal. You will be prompted to enter the decoder bit rate

only for ambiguous situations.

6.1.5 Advanced Encoder and Decoder Configuration

The encoder and decoder configurations, either using Quick

Configurations or the manual configuration method, will enable the bi-

directional transmission of audio for most applications. The Prima LT

has many exclusive features that add to the utility and flexibility, and

these are discussed here.

At this point, the encoder and decoder sections of the Prima LT are

completely configured for normal operation. The next section

discusses advanced features that set the Prima LT apart from other

codecs. If you will not be using any advanced encoder or decoder

features, you can skip to Section 6.2

If you will not be

using any

advanced encoder

or decoder

features, such as

error concealment,

gain adjustment,

digital I/O, etc.,

you can skip to

section 6.2

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