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參數(shù)資料
| 型號(hào)： | TECO3264 |
| 廠商： | Lineage Power |
| 英文描述： | 32-Channel Echo Canceller(32通道回波清除器) |
| 中文描述： | 32通道回聲消除器（32通道回波清除器） |
| 文件頁數(shù)： | 49/128頁 |
| 文件大?。?/td> | 2328K |
| 代理商： | TECO3264 |
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Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
49
Lucent Technologies Inc.
Register Architecture
(continued)
Registers, Functions, Symbols
—
Information Presentations
The 186 TECO3264 functional parameters vary from single-bit functions that enable/disable a particular function
like soft NLP to 14-bit variables that control the soft NLP level increments. These functions have a name, like soft
NLP increment, and a symbol, like ELOSS. These 186 functions are distributed among the 128 page 0 read/write
registers. A given function may be stored in a single register, or in as many as three registers for the 14-bit func-
tions. A given register may hold values for a single function or values for up to eight different functions.
As aids to finding the necessary functions to adjust for a particular task in the system design stage or for different
network conditions, the register, function, symbol, and function definition information is presented in several ways
in this document:
1.
Function list grouped by main echo canceller task, such as echo cancellation, masking, nonlinear processing,
tone disabling, and transmission parameters. See Table 11—Table 18, per-channel control parameters.
Page 0 registers 000—01F and page 1 registers 100—10E tables with the functions appearing in each register
with recommended values and discussions for key parameters. This is the main reference for function defini-
tions. See Table 24—Table 128.
Page 0 and page 1 registers address map with compact, detailed, bit-by-bit lists for each register. See Table
19, Parameter Address Map, on page 45.
Index of function names to symbols and register addresses. See Table 22, Function Name to Symbol and Reg-
ister Address Index, on page 53.
Index of symbols to register addresses and function names. See Table 23, Symbol to Register Address and
Function Name Index, on page 59.
Tables of recommended values for page 0 registers for DS1/μ-law and E1/A-law applications. See Table 20,
Recommended Register Values for DS1 (μ-Law) and 2.048 Mbits/s Rate, on page 51 and Table 21, Recom-
mended Register Values for E1 (A-Law), on page 52, respectively.
2.
3.
4.
5.
6.
When changing function values to adjust for different system options like μ-law or PCM timing, or for new network
conditions, it is more natural for the engineer to work in terms of the individual functions and not in terms of whole
register values. Changing one function value can change as many as three register values. A minor 1-bit change in
a function can appear to be a major change in a register value, depending on the location of the bit between most
significant and least significant positions. However, an efficient way to download new parameter values to the
TECO3264 is to download changes in whole register values by the RS-232 link. The user-interface software
between a controlling computer and the TECO3264 and its associated microprocessor can bridge this human-
machine difference in setting up the echo canceller system.
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