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參數資料
| 型號： | MT9300B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Multi-Channel Voice Echo Canceller(多通道話音回聲消除器) |
| 中文描述： | 多通道語音回聲消除器（多通道話音回聲消除器） |
| 文件頁數： | 1/37頁 |
| 文件大小： | 179K |
| 代理商： | MT9300B |
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1
Features
Independent multiple channels of echo
cancellation; from 32 channels of 64ms to 16
channels of 128ms with the ability to mix
channels at 128ms or 64ms in any combination
Independent Power Down mode for each group
of 2 channels for power management
ITU-T G.165 and G.168 compliant
Field proven, high quality performance
Compatible to ST-BUS and GCI interface at
2Mb/s serial PCM
PCM coding,
μ
/A-Law ITU-T G.711 or sign
magnitude
Per channel Fax/Modem G.164 2100Hz or
G.165 2100Hz phase reversal Tone Disable
Per channel echo canceller parameters control
Transparent data transfer and mute
Fast reconvergence on echo path changes
Non-Linear Processor with high quality
subjective performance
Protection against narrow band signal
divergence
Offset nulling of all PCM channels
10 MHz or 20 MHz master clock operation
3.3 Volts operation with 5-Volt tolerant inputs
No external memory required
Non-multiplexed microprocessor interface
IEEE-1149.1 (JTAG) Test Access Port
Applications
Voice over IP network gateways
Voice over ATM, Frame Relay
T1/E1/J1 multichannel echo cancellation
Wireless base stations
Echo Canceller pools
DCME, satellite and multiplexer systems
Description
The MT9300B Voice Echo Canceller implements a
cost effective solution for telephony voice-band echo
cancellation
conforming
requirements. The MT9300B architecture contains
16 groups of two echo cancellers (ECA and ECB)
which can be configured to provide two channels of
64 milliseconds or one channel of 128 milliseconds
echo cancellation. This provides 32 channels of 64
milliseconds to 16 channels of 128 milliseconds echo
cancellation
or
any
combination
configurations. The MT9300B supports ITU-T G.165
and G.164 tone disable requirements.
to
ITU-T
G.168
of
the
two
Figure 1 - Functional Block Diagram
RESET
Rout
IC0
Sout
DS CS R/W A10-A0 DTA
D7-D0
Test Port
Microprocessor Interface
Timing
Unit
Echo Canceller Pool
V
SS
V
DD
TDI TDO TCK TRST
TMS
Rin
IRQ
C4i
F0i
MCLK
Fsel
ODE
Sin
Serial
to
Parallel
Parallel
to
Serial
PLL
Group 0
ECA/ECB
Group 4
ECA/ECB
Group 8
ECA/ECB
Group 12
ECA/ECB
Group 1
ECA/ECB
Group 5
ECA/ECB
Group 9
ECA/ECB
Group 13
ECA/ECB
Group 2
ECA/ECB
Group 6
ECA/ECB
Group 10
ECA/ECB
Group 14
ECA/ECB
Group 3
ECA/ECB
Group 7
ECA/ECB
Group 11
ECA/ECB
Group 15
ECA/ECB
Note:
Refer to Figure 4
for Echo Canceller
block diagram
Ordering Information
MT9300BL
MT9300BV
-40
°
C to +85
°
C
160-Pin MQFP
208-Ball LBGA
DS5385
ISSUE 1
June 2000
MT9300B
Multi-Channel Voice Echo Canceller
Advance Information
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