Voice Processor Features High-density high-integration voice/data

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Voice Processor Features High-density high-integration voice/data

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CT-GWC2256
Voice Processor Features
High-density high-integration voice/data
convergence product that bridges circuit packet switched networks
voice channels chip Cascadable capacity beyond 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)
Echo cancellation
echo cancellation channels Provisionable echo cancellation Meets G.165 G.168 ITU-T standards
Vocoder selection per-call per-channel
basis
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
CENTILLIUM DELIVERABLE SOFTWARE CUSTOMER CALL PROCESSING SOFTWARE HOST CENTILLIUM DELIVERABLE SOFTWARE CENTILLIUM HOST SOFTWARE
SDRAM PROGRAM
SDRAM RISC PROGRAM
SDRAM CONTROLLER INTERFACE CIRCUIT SWITCHED NETWORK
SDRAM CONTROLLER
HOST INTERFACE UTOPIA INTERFACE
UTOPIA
ANETWORK
VOICE COMPRESSION, ECHO CANCELLATION, TELEPHONY FEATURES
RISC ATM, AAL2
CT-GWC2256
CENTILLIUM DELIVERABLE CHIP
CENTILLIUM DELIVERABLES
PRELIMINARY PRODUCT BRIEF
2000 VERSION
CT-GWC2256
Voice Processor
Overview
CT-GWC2256 first family products targeted gateways that bridge traditional circuit packet switched networks. single CT-GWC2256 supports full-duplex voice connections with ADPCM32 compression, 32ms echo cancellation side) well complete AAAL2 support. Future members this product family will provide support other packet types. main function CT-GWC2256 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 de-jittering, decompressed, terminated interface. CT-GWC2256 interfaces circuit switched networks through standard-compliant interface Anetwork through Utopia level interface. CT-GWC2256 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 processor Deliverable
CT-GWC2256 software
transmission Anetwork. Additionally, single CT-GWC2256 supports over subscription Ainterface, where type refresh messages from additional channels transported to-and-from host processor enable call setup tear-down functions. CT-GWC2256 closely controlled managed host processor that provides callcontrol functions. addition chip configuration management, host processor dynamically sets tears down connections within CT-GWC2256's switching fabric per-call basis. CT-GWC2256 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 16-Mbit 64-Mbit SDRAM devices optimum cost, power, area. CT-GWC2256 voice processor stacked higher capacity DS3) voice over AAL2 functionality. CT-GWC2XXX 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.
Format
432-pin EBGA 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 High-density high-integration voice/data

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