MT9300
Multi-Channel Voice Echo Canceller
Advance Information
Features
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Independent multiple channels 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
Conforms to ITU-T G.165 and G.168
Recommendations
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
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
V
DD
V
SS
DS5030
ISSUE 2
May 1999
Ordering Information
MT9300AL
160-Pin MQFP
-40°C to +85°C
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Applications
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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 MT9300 Voice Echo Canceller implements a
cost effective solution for telephony voice-band echo
cancellation
conforming
to
ITU-T
G.168
requirements. The MT9300 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 of the two
configurations. The MT9300 supports ITU-T G.165
and G.164 tone disable requirements.
ODE
Echo Canceller Pool
Rin
Sin
MCLK
Fsel
PLL
Serial
to
Parallel
Group 0
ECA/ECB
Group 1
ECA/ECB
Group 2
ECA/ECB
Group 3
ECA/ECB
Parallel
to
Serial
Rout
Sout
Group 4
ECA/ECB
Group 5
ECA/ECB
Group 6
ECA/ECB
Group 7
ECA/ECB
Group 8
ECA/ECB
Group 9
ECA/ECB
Group 10
ECA/ECB
Group 11
ECA/ECB
Group 12
ECA/ECB
C4i
F0i
Timing
Unit
Group 13
ECA/ECB
Group 14
ECA/ECB
Group 15
ECA/ECB
Note:
Refer to Figure 3
for Echo Canceller
block diagram
IC0
RESET
Microprocessor Interface
Test Port
DS CS R/W A10-A0 DTA
D7-D0
IRQ TMS TDI TDO TCK TRST
Figure 1 - Functional Block Diagram
1
MITEL [ MITEL NETWORKS CORPORATION ]
