CX81801-84 Просмотр технического описания (PDF) - Conexant Systems

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производитель

CX81801-84

SmartV.XX Modem

Conexant Systems 

CX81801-7x/8x SmartV.XX Modem Data Sheet

Contents

1. Introduction..........................................................................................................................................1-1

1.1 Overview ......................................................................................................................................................................... 1-1

1.2 Applications .................................................................................................................................................................... 1-2

1.3 Features .......................................................................................................................................................................... 1-4

1.3.1 General Modem Features................................................................................................................................ 1-4

1.3.2 SmartDAA Features ........................................................................................................................................ 1-5

1.3.3 Applications.................................................................................................................................................... 1-5

1.4 Technical Overview......................................................................................................................................................... 1-6

1.4.1 General Description ........................................................................................................................................ 1-6

1.4.2 MCU Firmware................................................................................................................................................ 1-6

1.4.3 Operating Modes ............................................................................................................................................ 1-6

1.4.3.1 Data/Fax Modes.......................................................................................................................... 1-6

1.4.3.2 V.44 Data Compression.............................................................................................................. 1-7

1.4.3.3 Worldwide Operation.................................................................................................................. 1-7

1.4.3.4 TAM Mode.................................................................................................................................. 1-8

1.4.3.5 Speakerphone Mode (S Models)................................................................................................ 1-9

1.4.4 Reference Designs.......................................................................................................................................... 1-9

1.5 Hardware Description ..................................................................................................................................................... 1-9

1.5.1 CX81801 Modem Device ................................................................................................................................ 1-9

1.5.2 Digital Isolation Barrier................................................................................................................................. 1-10

1.5.3 CX20493 SmartDAA Line Side Device.......................................................................................................... 1-10

1.5.4 CX20442 Voice Codec .................................................................................................................................. 1-10

1.6 AT Commands .............................................................................................................................................................. 1-10

2. Technical Specifications .......................................................................................................................2-1

2.1 Serial DTE Interface Operation........................................................................................................................................ 2-1

2.1.1 Automatic Speed/Format Sensing .................................................................................................................. 2-1

2.2 Parallel Host Bus Interface Operation............................................................................................................................. 2-2

2.3 Establishing Data Modem Connections .......................................................................................................................... 2-2

2.3.1 Dialing ............................................................................................................................................................ 2-2

2.3.2 Telephone Number Directory.......................................................................................................................... 2-2

2.3.3 Modem Handshaking Protocol ....................................................................................................................... 2-2

2.3.4 Call Progress Tone Detection ......................................................................................................................... 2-2

2.3.5 Answer Tone Detection................................................................................................................................... 2-2

2.3.6 Ring Detection................................................................................................................................................ 2-2

2.3.7 Billing Protection ............................................................................................................................................ 2-3

2.3.8 Connection Speeds......................................................................................................................................... 2-3

2.3.9 Automode ....................................................................................................................................................... 2-3

2.4 Data Mode ...................................................................................................................................................................... 2-4

102199B

Conexant

iii

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