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參數(shù)資料
| 型號： | MT8924 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | PCM Conference Circuit (PCC) Preliminary Information |
| 中文描述： | 會議的PCM電路（PCC）的初步信息 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 102K |
| 代理商： | MT8924 |
8-3
Features
Supports up to 10 independent conferences for
up to 32 PCM Voice Channels
ST-BUS compatible 2.048 Mb/s PCM Serial
Interface (also supports 1.536 Mb/s and 1.544
Mb/s data rates)
Per channel digital gain control (0/-3/-6 dB)
Parallel microprocessor port for device control
Programmable noise suppression
External Tone Input
Pin selectable A/
μ
-Law format
Low power CMOS technology
Available in 24 Pin PDIP and SOIC packages
Applications
Digital PBX / KTS
Conference bridges
Digital C.O. switches
Description
The MT8924 is designed to provide conference call
capability in digital switching systems. It allows up to
10 independent conferences to be set for up to 32
PCM voice channels.
A/
μ
-Law companded data from the PCM input port is
converted to linear format, processed by a dedicated
arithmetic unit, re-converted to companded format
and then sent to the PCM output port.The PCM
output signal contains all the information of each
channel connected in conference except its own.
Programmable attenuation and noise suppression
are provided for channels connected in conference
or transparent mode. Additionally, an input for an
external tone is featured that can be used as a signal
to indicate to connected parties that they are on a
conference call.
Figure 1 - Functional Block Diagram
ISSUE 1
April 1994
Parallel-to-Serial
Conversion
Conversion
Linear
to
μ
/A-Law
μ
/A-Law
to
Linear
Attenuation/Noise Suppression
Channel RAM
and
Adder
Serial-to-Parallel
DSTo
DSTi
Cki
F0i
Cko
D0-D7
TD
TF
OS
A/
μ
RESET
WR
RD
CS
C/D
Overflow
Timebase
PCM Tone
Generator
Control
Ordering Information
MT8924AE
24 Pin Plastic DIP (600 mil)
MT8924AS
24 Pin SOIC
0
°
C to +70
°
C
PCM Mode
Control
M
MT8924
PCM Conference Circuit (PCC)
Preliminary Information
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相關(guān)代理商/技術(shù)參數(shù) |
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| MT8924-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:PCM Conference Circuit (PCC) Preliminary Information |
| MT8924AE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:PCM Conference Circuit (PCC) Preliminary Information |
| MT8924AS | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:PCM Conference Circuit (PCC) Preliminary Information |
| MT8926 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY T1 Performance Monitoring Adjunct Circuit (PMAC) |
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