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ZL50212GB Datasheet

  • ZL50212GB

  • Telecomm/Datacomm

  • 40頁

  • ETC

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ZL50212
288 Channel Voice Echo Canceller
Data Sheet
Features
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ZL5012 has nine Echo Voice Processors in a
single BGA package. This single device provides
288 channels of 64 msec echo cancellation or
144 channels at 128 msec echo cancellation
Each Echo Voice Processor has the capability of
cancelling echo over 32 channels
Each Echo Voice Processor (EVP) shares the
address bus and data bus with each other
Fully compliant to ITU-T G.165, G.168 (2000) and
(2002) specifications
Passed all AT&T voice quality tests for carrier
grade echo canceller
The ZL5012 provides more than 63% board
space savings when compared with the nine Echo
Voice Processors packaged devices
Each EVP has a Patented Advanced Non-Linear
Processor with high quality subjective
performance
Each EVP has protection against narrow band
signal divergence and instability in high echo
environments
Each EVP can be programmed independently in
any mode e.g. Back-to-Back or Extended Delay to
provide capability of cancelling different echo
tails.
DS5030
ISSUE 1
July 2002
Ordering Information
ZL50212GB 535 - Ball BGA
-40擄C to +85擄C
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Each EVP has 0 to -12 dB level adjusters at all
signal ports (Rin, Sin, Sout and Rout)
Each EVP has the same JTAG identification code
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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 system
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Description
The ZL5012 Voice Echo Canceller implements a cost
effective solution for telephony voice-band echo
cancellation conforming to ITU-T G.168 requirements.
The ZL5012 architecture contains 144 groups of two
echo cancellers (ECA and ECB) which can be
configured to provide two channels of 64 milliseconds or
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ZL5012GB
Rin1...Rin9
Rout1..Rout9
Sin1....Sin9
D0....D7
CS1..CS9
A0..A12
EVP1
EVP2
EVP3
Sout1..Sout9
EVP4
EVP9
EVP5
IRQ1..IRQ9
RESET1..RESET9
EVP6
EVP7
EVP8
DTA1..DTA9
MLCK
ODE
Fsel
R/W
C4i
Figure 1 - ZL5012 Device Overview
DS
Foi
SEMICMF.019
1

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