Voice Processor Features Second member family high-density h

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Voice Processor Features Second member family high-density h

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CT-GWT2048
Voice Processor Features
Second member family high-density
high-integration voice/data convergence products that bridges circuit packet switched networks
voice channels chip Cascadable higher capacities Fully compliant ITU-T standards Aforum specifications Comfort noise generation (CNG) channel A-law µ-law support conversion Automatic detection fax/data modem calls revert kbps relay support (future)
Networking features
Complete user plane AAAL2 support Support control plane traffic (AAL2 type messages, cells, etc.) Split merge AAL2 control management traffic with user plane traffic over-subscription support Ainterface Support SSSAR SSTED
Performs telephony networking
functions chip
power dissipation Watts
channels
Voice compression
channels ADPCM32 channels G.729 (future)
Vocoder selection per-call per-channel
basis
Echo cancellation
echo cancellation channels Provisionable echo cancellation Meets G.165 G.168 ITU-T standards
Host provides easy system integration Extensive management performance
monitoring
Telephony features
Voice activity detection (VAD) Silence insertion descriptor (SID) support
Support in-operation standby system
diagnostics including self tests
Support redundancy
System Block Diagram
CUSTOMER CALL PROCESSING SOFTWARE HOST
SDRAM RISC PROGRAM
CENTILLIUM DELIVERABLE SOFTWARE
CENTILLIUM HOST SOFTWARE
SDRAM CONTROLLER INTERFACE CIRCUIT SWITCHED NETWORK
HOST INTERFACE UTOPIA INTERFACE
UTOPIA
ANETWORK
VOICE COMPRESSION, ECHO CANCELLATION, TELEPHONY FEATURES
RISC ATM, AAL2
CT-GWT2048
CENTILLIUM DELIVERABLE CHIP
CENTILLIUM DELIVERABLES
PRELIMINARY PRODUCT BRIEF
2000 VERSION
CT-GWT2048
Overview
CT-GWT2048 second member family products targeted gateways that bridge traditional circuit packet switched networks. single CT-GWT2048 supports full-duplex voice connections with compression, 32-ms echo cancellation side) well complete AAAL2 support. Future members this product family will provide support other packet types. main function CT-GWT2048 provide format conversion switching between individual voice streams, flowing across packetized voice conventional circuit switched voice highways. Each voice channel from side echo canceled, compressed, packetized transmission over Anetwork. reverse direction, each packetized voice channel from Anetwork buffered dejittering, decompressed, terminated interface. CT-GWT2048 interfaces circuit switched network through standard-compliant interface Anetwork through Utopia level interface. CT-GWT2048 supports layer 2/layer control plane traffic transport over Anetwork (for example, signaling voice over AAL2). Control plane messages received from Anetwork split routed host processor, while user plane traffic scheduled voice processing then routed highway. Voice traffic from highway merged with control plane traffic from host proces-
transmission Anetwork. Additionally, single CT-GWT2048 supports over subscription Ainterface, where type refresh messages from additional channels transported toand-from host processor enable call setup tear-down functions. CT-GWT2048 closely controlled managed host processor that provides call-control functions. addition chip configuration management, host processor dynamically sets tears down connections within CT-GWT2048's switching fabric per-call basis. CT-GWT2048 also reports call statistics per-call basis well periodic basis. Off-chip local memory needed store switching fabric tables, received cells packets, voice samples, echo cancellation contexts, programs, networking programs. local memory implemented with 64-Mbit SDRAM device optimum cost, power, area. CT-GWT2048 voice processor stacked higher capacity voice over AAL2 functionality. CT-GWT2XXX family devices designed with future upgradeability mind. Voice compression, echo cancellation, telephony features performed Centillium Communications' proprietary programmable DSP. Networking functionality (AAL2) performed embedded RISC processor. This enables easy field upgradeability future software releases.
Deliverable
CT-GWT2048 software
Format
executable code
Functions
Comments
Loaded power Loaded power This code integrated with customer software running customer host processor.
Hardware functions Voice compression, echo cancellation, telephony functions On-chip RISC software RISC executable code AAL2 other networking functions Host software source code Host API, chip drivers, switch fabric management, chip resource management
Contact Information
Centillium Communications, Inc. 47211 Lakeview Blvd. Fremont, 94538
Tel: (510) 771-3700 Fax: (510) 771-3500 Web: www.centillium.com Email: info@centillium.com
Disclaimer: This document contains information product under development Centillium Communications, Inc. This information intended help evaluate this product. Centillium Communications reserves right change discontinue work this proposed product without notice. Trademarks: company product names mentioned this document trademarks registered trademarks their manufacturers.
PRELIMINARY PRODUCT BRIEF VERSION

Voice Processor Features Second member family high-density h

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