CX81801-7x/8x SmartV.XX Modem Data Sheet
Contents
1. Introduction..........................................................................................................................................1-1
1.1
1.2
1.3
Overview......................................................................................................................................................................... 1-1
Applications.................................................................................................................................................................... 1-2
Features .......................................................................................................................................................................... 1-4
1.3.1
1.3.2
1.3.3
General Modem Features................................................................................................................................ 1-4
SmartDAA Features ........................................................................................................................................ 1-5
Applications.................................................................................................................................................... 1-5
1.4
Technical Overview......................................................................................................................................................... 1-6
1.4.1
1.4.2
1.4.3
General Description........................................................................................................................................ 1-6
MCU Firmware................................................................................................................................................ 1-6
Operating Modes............................................................................................................................................ 1-6
1.4.3.1
1.4.3.2
1.4.3.3
1.4.3.4
1.4.3.5
Data/Fax Modes.......................................................................................................................... 1-6
V.44 Data Compression.............................................................................................................. 1-7
Worldwide Operation.................................................................................................................. 1-7
TAM Mode.................................................................................................................................. 1-8
Speakerphone Mode (S Models)................................................................................................ 1-9
1.4.4
Reference Designs.......................................................................................................................................... 1-9
1.5
1.6
Hardware Description..................................................................................................................................................... 1-9
1.5.1
1.5.2
1.5.3
1.5.4
CX81801 Modem Device................................................................................................................................ 1-9
Digital Isolation Barrier................................................................................................................................. 1-10
CX20493 SmartDAA Line Side Device.......................................................................................................... 1-10
CX20442 Voice Codec.................................................................................................................................. 1-10
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
2.3
Parallel Host Bus Interface Operation............................................................................................................................. 2-2
Establishing Data Modem Connections.......................................................................................................................... 2-2
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
2.3.9
Dialing ............................................................................................................................................................ 2-2
Telephone Number Directory.......................................................................................................................... 2-2
Modem Handshaking Protocol....................................................................................................................... 2-2
Call Progress Tone Detection ......................................................................................................................... 2-2
Answer Tone Detection................................................................................................................................... 2-2
Ring Detection................................................................................................................................................ 2-2
Billing Protection............................................................................................................................................ 2-3
Connection Speeds......................................................................................................................................... 2-3
Automode....................................................................................................................................................... 2-3
2.4
Data Mode ...................................................................................................................................................................... 2-4
102199B
Conexant
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CONEXANT [ CONEXANT SYSTEMS, INC ]
