Altec AL2094S User Manual
AL2094S Designers Guide
Analog Socket Modem
AL2094S Series
Designer’s Guide
RELEASED 2. SEPTEMBER 2005
Doc. No. DG_2094A Altec Electronic AG 1 / 30
AL2094S Designers Guide
Information provided by Altec Electronic AG is believed to be accurate and reliable.
However, no responsibility is assumed by Altec Electronic for its use, nor any
infringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent rights of Altec
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reserves the right to change circuitry at any time without notice. This document is
subject to change without notice.
Product names or services listed in this publication are for identification purposes
only, and may be trademarks or registered trademarks of their respective companies.
All other marks mentioned herein are the property of their respective owners.
© 2003 Altec Electronic AG
Printed in Switzerland
All Rights Reserved
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AL2094S Designers Guide
Table of Contents
1. INTRODUCTION ..........................................................................................................5
1.1 Overview.......................................................................................................................5
1.2 FEATURES ..................................................................................................................6
1.2.1 General Modem Features.........................................................................................6
1.2.2 SmartDAA Features .................................................................................................6
1.3 TECHNICAL OVERVIEW.............................................................................................7
1.3.1 General Description ..............................................................................................7
1.3.2 MCU Firmware......................................................................................................7
1.3.3 Operating Modes ..................................................................................................7
1.3.4 V.44 Data Compression........................................................................................7
1.3.5 Synchronous Access Mode (SAM) - Video Conferencing ....................................8
1.3.6 Worldwide Operation ............................................................................................8
2. Technical Specifications ...............................................................................................9
2.1 Serial DTE Interface Operation ....................................................................................9
2.1.1 Automatic Speed/Format Sensing............................................................................9
2.2 Establishing Data Modem Connections........................................................................9
2.2.1 Telephone Number Directory....................................................................................9
2.2.2 Dialing.......................................................................................................................9
2.2.3 Modem Handshaking Protocol ...............................................................................10
2.2.4 Call Progress Tone Detection.................................................................................10
2.2.5 Answer Tone Detection ..........................................................................................10
2.2.6 Ring Detection ........................................................................................................10
2.2.7 Billing Protection.....................................................................................................10
2.2.8 Connection Speeds ................................................................................................ 10
2.2.9 Automode ...............................................................................................................10
2.3 Data Mode ..................................................................................................................11
2.3.1 Speed Buffering (Normal Mode).............................................................................11
2.3.2 Flow Control ...........................................................................................................11
2.3.3 Escape Sequence Detection ..................................................................................11
2.3.4 BREAK Detection ...................................................................................................11
2.3.5 Telephone Line Monitoring .....................................................................................11
2.3.6 Fall Forward/Fallback (V.90/V.34/V.32 bis/V.32)....................................................11
2.3.7 Retrain ....................................................................................................................11
2.3.8 Programmable Inactivity Timer...............................................................................11
2.3.9 DTE Signal Monitoring (Serial DTE Interface Only)................................................11
2.4 Modem-on-Hold..........................................................................................................12
2.5 Error Correction and Data Compression ....................................................................12
2.5.1 V.42 Error Correction..............................................................................................12
2.5.2 MNP 2-4 Error Correction.......................................................................................12
2.5.3 V.44 Data Compression .........................................................................................12
2.5.4 V.42 bis Data Compression....................................................................................12
2.5.5 MNP 5 Data Compression......................................................................................12
2.6 MNP 10 Data Throughput Enhancement ...................................................................12
2.7 Telephony Extensions ................................................................................................13
2.7.1 Line In Use Detection .............................................................................................13
2.7.2 Extension Pickup Detection....................................................................................13
2.7.3 Remote Hangup Detection .....................................................................................13
2.8 Caller ID......................................................................................................................13
2.9 Worldwide Country Support........................................................................................13
2.10 Diagnostics .................................................................................................................14
Commanded Tests............................................................................................................14
2.11 Low Power Sleep Mode..............................................................................................14
3. Hardware Interface ..................................................................................................... 15
3.1 AL2094S Modem Hardware Pins and Signals ...........................................................15
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AL2094S Designers Guide
3.1.1 Phone Line Interface...................................................................................15
3.1.2 Call Progress Speaker Interface.................................................................15
3.1.3 Serial DTE Interface and Indicator Outputs ................................................15
3.1.4 External Reset Input ...................................................................................15
3.1.5 AL2094S Modem Pin Assignments and Signal Definitions ................................15
3.3 Electrical and Environmental Specifications...............................................................19
3.3.1 Operating Conditions, Maximum Ratings, Power Requirements........................19
3.3.2 Interface and Timing Waveforms............................................................................20
3.3.2.1 Serial DTE Interface................................................................................20
3.4 DAA Interface .............................................................................................................21
4. DESIGN CONSIDERATIONS ....................................................................................23
4.1 PC Board Layout Guidelines ......................................................................................23
4.1.1 General...................................................................................................................23
4.1.2 Electromagnetic Interference (EMI) Considerations...............................................24
4.2 Other Considerations..................................................................................................24
4.3 Manufacturing Considerations....................................................................................25
5. PACKAGE DIMENSIONS ..........................................................................................26
6. SOCKET MODEM APPROVALS ............................................................................... 27
6.1 Considerations for Telecom Approvals.......................................................................27
6.1.1 PSTN Connection...................................................................................................27
6.2 Considerations for Electrical Safety............................................................................27
6.2.1 Conditions for Maintaining Safety Compliance (European Countries)....................27
6.2.2 Power Supply [EN60950-1:2001, 1.6] ....................................................................28
6.2.3 Clearances, Creepage Distances and Distances through Insulation [EN60950-
1:2001, 2.10.3 and 2.10.4] ................................................................................................28
6.3 Considerations for EMC .............................................................................................30
6.3.2 Installation in Host Systems (European Countries) ...............................................30
List of Figures
FIGURE 3-1. AL2094S MODEM HARDWARE SIGNALS................................................................16
F
IGURE 3-5. WAVEFORMS - SERIAL DTE INTERFACE ................................................................20
F
IGURE 3-3. RECOMMENDED TELEPHONE LINE INTERFACE FOR U.S. SOCKET MODEM ..............21
F
IGURE 3-4. RECOMMENDED TELEPHONE LINE INTERFACE FOR WORLD CLASS SOCKET MODEM.22
F
IGURE 5-1. AL2094S SOCKET MODEM PHYSICAL DIMENSIONS ...............................................26
List of Tables
Table 2-1. +MS Command Automode Connectivity ...............................................................10
Table 3-1. AL2094S Modem DIL-40 Pin Signals....................................................................16
Table 3-2. Signal Descriptions ...............................................................................................17
Table 3-3. Signal Descriptions (Cont'd)..................................................................................18
Table 3-4. AL2094S Modem I/O Type Definitions..................................................................18
Table 3-5. AL2094S Modem DC Electrical Characteristics....................................................18
Table 3-9. Operating Conditions ............................................................................................19
Table 3-10. Absolute Maximum Ratings ................................................................................19
Table 3-11. Current and Power Requirements.......................................................................19
Table 3-7. DAA Part List.........................................................................................................22
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AL2094S Designers Guide
11.. IINNTTRROODDUUCCTTIIOONN
1.1 Overview
Altec’s AL2094S Socket Modem Family provides the OEM with a complete V.92, V.34 and
V.32bis data/fax/voice modem in a compact socket-mountable DIL-40 module. This designer's
guide describes the modem hardware. AT commands and S registers are defined in the AT
Command Reference Manual.
The compact size and high level of integration of the Socket Modem minimizes real estate and
cost for motherboard and box modem applications. Its low power consumption makes it ideal
for portable applications such as pocket modems or laptop, notebook and palmtop computers,
and for a wide variety of embedded control applications. The pin compatibility between the full
range of AL Series Socket Modems, ISDN and GSM Socket Modems allows upgrading and
production configurability without hardware changes.
Data compression (V.44/V.42 bis/MNP 5) and error correction (V.42/MNP 2-4) modes are
supported to maximize data throughput and data transfer integrity. V.44 is a more efficient
data compression than V.42 bis that significantly increases downstream throughput thus
reducing the download time for the types of files associated with Internet use, such as Web
pages and uncompressed files such as graphics, image, audio, and document files. V.44 data
compression can achieve compression rates of more than 25% over V.42bis. Typical
compression ratio for V.44 on Web type data is approximately 6-1 resulting in overall effective
data throughput rate up to 300 kbps for a 56 kbpsconnection. Non-error-correcting mode is
also supported.
In V.22 bis fast connect mode, the modem can connect at 2400 bps with a very short training
time, which is very efficient for small data transfers.
The SmartDAA system-powered DAA operates reliably without drawing power from the line,
unlike line-powered DAAs which operate poorly when line current is insufficient due to long
lines or poor line conditions. Enhanced features, such as monitoring of local extension status
without going off-hook, are also supported.
CX86500
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1.2 FEATURES
1.2.1 General Modem Features
• Data modem
- QuickConnect and Modem-on-hold functions
- ITU-T V.92 , V.34 , V.32bis, V.32,
- V.22 bis, V.22, V.23, and V.21; Bell 212A and Bell 103
- V.250 and V.251 commands
• V.22 bis fast connect
• Data compression and error correction
- V.44 data compression
- V.42 bis and MNP 5 data compression
- V.42 LAPM and MNP 2-4 error correction
• Hardware-based modem controller
• Hardware-based digital signal processor (DSP)
• Worldwide operation
- Complies to TBR21 and other country requirements
- Caller ID detection for many countries
- Call progress, blacklisting
- Internal ROM includes default values for 29 countries
- Additional modified country profiles can be stored in internal SRAM
• Caller ID detect
- On-hook Caller ID detection
- Off-hook Call Waiting Caller ID detection during data mode in V.90, V.34,
V.32bis, and V.32
• Distinctive ring detect
• Built-in DTE interface
• Serial ITU-T V.24 (EIA/TIA-232-E) logical interface up to 115.2 kbps
• Direct mode (serial DTE interface)
• Flow control and speed buffering
• Automatic format/speed sensing
• Serial async/sync data
• +3.3V operation with +5V tolerant digital inputs
• Typical power use
- 220 mW (Normal Mode)
- 56 mW (Sleep Mode)
1.2.2 SmartDAA Features
• System side powered DAA operates under poor line current supply conditions
• Modem Wake-on-Ring
• Ring detection
• Line polarity reversal detection
• Line current loss detection
• Pulse dialing
• Line-in-use detection during on-hook operation
• Remote hang-up detection for efficient call termination
• Extension pickup detection
• Call waiting detection
• Digital PBX line protection
• Meets worldwide DC VI masks requirements
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AL2094S Designers Guide
1.3 TECHNICAL OVERVIEW
1.3.1 General Description
Modem operation, including dialing, call progress, telephone line interface, telephone
handset interface, and host DTE interface functions are supported and controlled through the
V.250, V.251, and V.253-compatible command set.
1.3.2 MCU Firmware
MCU firmware performs processing of general modem control, command sets, data modem,
error correction and data compression (ECC), fax class 1, fax class 1.0, voice/audio/TAM,
worldwide, V.80, and serial DTE host interface functions according to modem models (Table
1-1).
1.3.3 Operating Modes
In V.90 data modem mode (V.92 models), the modem can receive data from a digital source
using a V.92-compatible central site modem at line speeds up to 56 kbps. Asymmetrical data
transmission supports sending data at line speeds up to V.34 rates. This mode can fallback
to full-duplex V.34 mode and to lower rates as dictated by line conditions.
The following modes are also supported in V.92 models:
• QuickConnect which allows quicker subsequent connection to a server using stored line
parameters obtained during the initial connection. The server must support quick connect
profiles.
• Modem-on-Hold which allows detection and reporting of incoming phone calls on the
PSTN with enabled Call Waiting. If the incoming call is accepted by the user, the user has
a pre-defined amount of time of holding the data connection for a brief conversation. The
data connection resumes upon incoming call termination. The server must support
Modem-on-Hold functionality.
In V.34 data modem mode (V.90+ and V.34 models), the modem can operate in 2-wire, fullduplex, asynchronous modes at line rates up to 33.6 kbps. Data modem modes perform
complete handshake and data rate negotiations. Using V.34 modulation to optimize modem
configuration for line conditions, the modem can connect at the highest data rate that the
channel can support from 33600 bps down to 2400 bps with automatic fallback. Automode
operation in V.34 is provided in accordance with PN3320 and in V.32 bis in accordance with
PN2330. All tone and pattern detection functions required by
the applicable ITU or Bell standards are supported.
In V.32 bis data modem mode, the modem can operate at line speeds up to 14.4 kbps.
In V.22 bis fast connect data mode, the modem can connect at 2400 bps with a very short
training time, which is very efficient for small data transfers.
1.3.4 V.44 Data Compression
V.44 provides more efficient data compression than V.42 bis that significantly decreases the
download time for the types of files associated with Internet use. This significant
improvement is most noticeable when browsing and searching the web since HTML text files
are highly compressible. (The improved performance amount varies both with the actual
format and with the content of individual pages and files.)
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1.3.5 Synchronous Access Mode (SAM) - Video Conferencing
V.80 Synchronous Access Mode between the modem and the host/DTE is provided for hostcontrolled communication protocols, e.g., H.324 video conferencing applications. Voice-callfirst (VCF) before switching to a videophone call is also supported.
1.3.6 Worldwide Operation
The modem operates in TBR21-compliant and other countries. Country-dependent modem
parameters for functions such as dialing, carrier transmit level, calling tone, call progress
tone detection, answer tone detection, blacklisting, caller ID, and relay control are
programmable.
SmartDAA technology allows a single PCB design and single BOM to be homologated
worldwide. Advanced features such as extension pickup detection, remote hang-up
detection, line-in-use detection, and digital PBX detection are supported. Country code IDs
are defined by ITU-T T.35.
Internal ROM includes default profiles for 29 countries including TBR21-compliant profiles.
Additional country profiles can be stored in internal SRAM (request additional country
profiles from a Conexant Sales Office). Duplicate country profiles stored in internal SRAM
will override the profiles in internal RAM firmware. The default countries supported are listed
in Table 1-2.
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AL2094S Designers Guide
22.. TTEECCHHNNIICCAALL SSPPEECCIIFFIICCAATTIIOONNSS
2.1 Serial DTE Interface Operation
2.1.1 Automatic Speed/Format Sensing
Command Mode and Data Modem Mode. The modem can automatically determine the
speed and format of the data sent from the DTE. The modem can sense speeds of 300, 600,
1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800,
38400, 57600, and 115200 bps and the following data formats:
The modem can speed sense data with mark or space parity and configures itself as follows:
Fax Modem Mode. In V.17 fax mode, the modem can sense speeds up to 115.2 kbps.
2.2 Establishing Data Modem Connections
2.2.1 Telephone Number Directory
The modem supports four telephone number entries in a directory that can be saved in a
serial NVRAM. Each telephone number can be up to 32 characters (including the command
line terminating carriage return) in length. A telephone number can be saved using the
&Zn=x command, and a saved telephone number can be dialed using the DS=n command.
2.2.2 Dialing
DTMF Dialing. DTMF dialing using DTMF tone pairs is supported in accordance with ITU-T
Q.23. The transmit tone level complies with Bell Publication 47001.
Pulse Dialing. Pulse dialing is supported in accordance with EIA/TIA-496-A.
Blind Dialing. The modem can blind dial in the absence of a dial tone if enabled by the X0,
X1, or X3 command.
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