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AL2094S Designers Guide
Analog Socket Modem
AL2094S Series
Designer’s Guide
RELEASED 2. SEPTEMBER 2005
Doc. No. DG_2094A Altec Electronic AG 1 / 30
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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 Electronic other than for circuitry embodied in Al
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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.....................................
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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 Assignment
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AL2094S Designers Guide 1 1.. IIN NT TR RO OD DU UC CT TIIO ON N 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 bo
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AL2094S Designers Guide 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 proce
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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/
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AL2094S Designers Guide 1.3.5 Synchronous Access Mode (SAM) - Video Conferencing V.80 Synchronous Access Mode between the modem and the host/DTE is provided for host- controlled communication protocols, e.g., H.324 video conferencing applications. Voice-call- first (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, carri
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AL2094S Designers Guide 2 2.. T TE EC CH HN NIIC CA AL L S SP PE EC CIIF FIIC CA AT TIIO ON NS S 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:
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AL2094S Designers Guide 2.2.3 Modem Handshaking Protocol If a tone is not detected within the time specified in the S7 register after the last digit is dialed, the modem aborts the call attempt. 2.2.4 Call Progress Tone Detection Ringback, equipment busy, congested tone, warble tone, and progress tones can be detected in accordance with the applicable standard. 2.2.5 Answer Tone Detection Answer tone can be detected over the frequency range of 2100 ± 40 Hz in ITU-T modes and 2225 ± 40
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AL2094S Designers Guide 2.3 Data Mode Data mode exists when a telephone line connection has been established between modems and all handshaking has been completed. 2.3.1 Speed Buffering (Normal Mode) Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed different than the line speed. The modem supports speed buffering at all line speeds. 2.3.2 Flow Control DTE-to-Modem Flow Control. If the modem-to-line speed is less than the DTE-tomodem speed, the
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AL2094S Designers Guide 2.4 Modem-on-Hold The Modem-on-Hold (MOH) function (V.92 models only) enables the modem to place a data call to the Internet on hold while using the same line to accept an incoming or place an outgoing voice call. This feature is available only with a connection to a server supporting MOH. MOH can be executed through either of two methods: • One method is to enable MOH through the +PMH command. With Call Waiting Detection (+PCW command) enabled, an incoming cal
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AL2094S Designers Guide 2.7 Telephony Extensions The following telephony extension features are supported and can be typically be implemented in designs for set-top box applications and TAM software applications to enhance end-user experience: • Line In Use detection • Extension Pickup detection • Remote Hang-up detection 2.7.1 Line In Use Detection The Line In Use Detection feature can stop the modem from disturbing the phone line when the line is already being used. When an autom
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AL2094S Designers Guide • Calling tone is generated in accordance with V.25. Calling tone may be toggled (enabled/disabled) by inclusion of a “^” character in a dial string. It may also be disabled. • Frequency and cadence of tones for busy, ringback, congested, warble, dial tone 1, and dial tone 2. • Answer tone detection period. • Blacklist parameters. The modem can operate in accordance with requirements of individual countries to prevent misuse of the network by limiting repeated c
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AL2094S Designers Guide 3 3.. H HA AR RD DW WA AR RE E IIN NT TE ER RF FA AC CE E 3.1 AL2094S Modem Hardware Pins and Signals 3.1.1 Phone Line Interface The phone-line interface signals are: • TIP • RING 3.1.2 Call Progress Speaker Interface The call progress speaker interface signal is: • Digital speaker output (DSPKOUT); output DSPKOUT is a square wave output in Data/Fax mode used for call progress or carrier monitoring. This output can be optionally connected to a
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AL2094S Designers Guide FIGURE 3-1. AL2094S MODEM HARDWARE SIGNALS 1 40 GND RXD 2 39 GND TXD 3 38 VCC1 DTR 4 37 VCC2 DCD 5 36 RESET DCD 6 35 NC CTS 7 34 SPKOUT RTS 8 33 TDCLK RI 9 32 RDCLK NC 19 22 NC NC 20 21 RING TIP Table 3-1. AL2094S Modem DIL-40 Pin Signals Pin No NAME Pin No NAME 1 GND 40 RXD 2 GND 39 TXD 3 VCC1 38 DTR 4 VCC2 37 DCD 5 EXTRESET 36 DSR/DCD 6
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AL2094S Designers Guide Table 3-2. Signal Descriptions Label Pin I/O I/O Type Signal Name/Description VCC 3,4 P PWR Digital Supply Voltage. Connect to VCC (+3.3V, filtered). GND 1,2 G GND Digital Ground. Connect to digital ground (GND). Reset. . Open collector input/output. Drive only with open- collector circuit. The active low RESET# input resets the Modem logic and clears the internal SRAM. RESET# low holds the modem in the reset state; RESET# going high releases the modem from
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AL2094S Designers Guide Table 3-3. Signal Descriptions (Cont'd) Label Pin I/O I/O Type Signal Name/Description Request To Send (EIA CA/ITU-T CT105). RTS# input ON (low) indicates that the DTE is ready to send data to the modem. In the command state, the modem ignores RTS#. In asynchronous operation, the modem ignores RTS# unless RTS 34 I Ithpu RTS/CTS flow control is selected by the &Kn command. In synchronous on-line operation, the modem can be commanded by the &Rn command to ignor
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AL2094S Designers Guide 3.3 Electrical and Environmental Specifications 3.3.1 Operating Conditions, Maximum Ratings, Power Requirements. The operating conditions are specified in Table 3-9. The absolute maximum ratings are listed in Table 3-10. The current and power requirements are listed in Table 3-11. Table 3-9. Operating Conditions Parameter Symbol Limits Units Supply Voltage VDD + 3.0 to +3.6 VDC Operating Ambient Temperature T 0 to + 70 °C A Table 3-
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AL2094S Designers Guide 3.3.2 Interface and Timing Waveforms 3.3.2.1 Serial DTE Interface The serial DTE interface waveforms for 4800 and 9600 bps are illustrated in Figure 3-5. FIGURE 3-5. WAVEFORMS - SERIAL DTE INTERFACE Doc. No. DG_2094E Altec Electronic AG Seite 20 / 30
