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參數(shù)資料
| 型號(hào)： | PEB2445N |
| 廠商： | SIEMENS AG |
| 英文描述： | LTM4600 Evaluation Kit |
| 中文描述： | ？多點(diǎn)交換和會(huì)議股-衰減？ |
| 文件頁(yè)數(shù)： | 10/70頁(yè) |
| 文件大?。?/td> | 1236K |
| 代理商： | PEB2445N |
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PEB 2445
Overview
Semiconductor Group
10
02.96
The PCM samples of each input channel first pass through an input processing stage.
In this stage, an input attenuation level (0, 3, 6 or 9 dB) and a noise suppression
threshold can be programmed individually for each channel. Following the input
processing the PCM data is expanded according to the A- or
μ
-law encoding rules and
written to the Data Memory (DM). Additionally the PCM data of each input channel is
added to the Conference Sum Memory (CSM). The DM location (1 out of 64) is specified
by the Conference Control Address (CCA) and the CSM location (1 out of 21) is specified
by the conference number when writing to the Conference Control Memory (CCM).
The PCM data then passes through a substractor stage such that the resulting output
channel for a given subscriber contains the contribution of all the other channels in the
conference except its own. Finally the PCM data is forwarded to the output channel after
PCM compression and an optional output attenuation of 3 dB.
Attenuation
Attenuation is a new requirement for PBX switching systems. The purpose is to avoid
echo and noise problems on a PBX network for voice connections with access to the
public network. Further a certain loudness rating on a definite point for different terminals
and phones could be fixed (see
figure 3
).
Figure 3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PEB2447 | Memory Time Switch Extended Large MTSXL |
| PEB2447H | Memory Time Switch Extended Large MTSXL |
| PEB2466 | Four Channel Codec Filter with PCM- and m-Controller Interface SICOFI4-mC |
| PEB2466-HV1.2 | Four Channel Codec Filter with PCM- and m-Controller Interface SICOFI4-mC |
| PEB24902 | Quad ISDN Echocancellation Circuit Analogue Front End Quad IEC AFE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PEB2445-N | 制造商:INFINEON 制造商全稱(chēng):Infineon Technologies AG 功能描述:Multipoint Switching and Conferencing Unit - Attenuation MUSAC-A |
| PEB2445P | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:PCM， Other/Special/Miscellaneous |
| PEB2447 | 制造商:INFINEON 制造商全稱(chēng):Infineon Technologies AG 功能描述:Memory Time Switch Extended Large MTSXL |
| PEB2447H | 制造商:INFINEON 制造商全稱(chēng):Infineon Technologies AG 功能描述:Memory Time Switch Extended Large MTSXL |
| PEB2447HV1.2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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