Manual do usuário Multi-Tech Systems MT2456SMI22

Manual para o dispositivo Multi-Tech Systems MT2456SMI22

Dispositivo: Multi-Tech Systems MT2456SMI22
Categoria: Modem
Fabricante: Multi-Tech Systems
Tamanho: 0.94 MB
Data de adição: 6/16/2014
Número de páginas: 58
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Resumo do conteúdo contido na página número 1

SocketModem
Embedded Modem
MT2456SMI–22
Serial Interface
Developer’s Guide

Resumo do conteúdo contido na página número 2

Copyright SocketModem MT2456SMI–22 Developer’s Guide PN S000281A, Version A Copyright This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi- Tech Systems, Inc. All rights reserved. Copyright © 2003, by Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Fur

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Contents Chapter 1 – Product Description and Specifications .................................................................................................4 Product Description....................................................................................................................................................4 Technical Specifications.............................................................................................................................................5 Chapt

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Chapter 1 – Product Description and Specifications Chapter 1 – Product Description and Specifications The Multi-Tech SocketModem supports analog data modem operation with V.22bis Fast Connect, V.42bis data compression, and V.80 synchronous access mode. The SocketModem is a space-efficient (1" × 2.5"), embedded modem that is ready-to-integrate into your applications; therefore, dramatically reducing development time and costs for system designers. The SocketModem also complies with telecom requir

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Chapter 1 – Product Description and Specifications Technical Specifications The SocketModem meets the following specifications: Client-to-Server Data Rates V.22 bis Client-to-Client Data Rates 2400, 1200, 0-300 bps Data Format Serial, asynchronous Modem Compatibility V.22bis, V.22; Bell 212A and 103/113; ITU-T V.21 & V.23 Error Correction ITU-T V.42 (LAP-M or MNP 2–4) Data Compression ITU-T V.42bis Speed Conversion Serial port data rates adjustable to 300, 1200, 2400, 4800, 9600, 19,200, 38,400,

Resumo do conteúdo contido na página número 6

Chapter 2  Mechanical Specifications Chapter 2 – Mechanical Specifications Physical Dimensions Figure 2–1. Maximum Component Height Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 6

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Chapter 2  Mechanical Specifications Pin Configurations The MT2456SMI SocketModem with a serial interface use a 16-pin interface to provide an on-board DAA with tip and ring connections, audio circuit for call-progress monitoring and serial interface via logic level signals. Figure 2–2. Serial SocketModem Pins Pin Descriptions Pin Signal I/O Description # Name Type 1 Tip I/O Tip Signal from Telco. Tip connection to the phone line (RJ11 Pin 3). SocketModem is Tip/Ring is polarity insensitive. 2

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Chapter 2  Mechanical Specifications 36 –RI O Ring Indicate. –RI output ON (low) indicates the presence of an ON segment of a ring signal on the telephone line. The modem will not go off-hook when – RI is active; the modem waits for –RI to go inactive before going off-hook. Data Set Ready. -DSR indicates modem status to the DTE. –DSR OFF 37 –DSR O (high) indicates that the DTE is to disregard all signals appearing on the interchange circuits except Ring Indicator (–RI). It reflects the statu

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Chapter 3  Electrical Characteristics Chapter 3 – Electrical Characteristics 3.3V and 5V Serial SocketModem 3.3V DC Characteristics (TA = 0°C to 70°C; VDD = 3.3 V ± 0.3 V) VDDMAX = 3.6 V 5V DC Characteristics (TA = 0°C to 50°C; VDD = 5 V ± 0.25 V) VDDMAX = 5.25 V Input High Input Low Inputs –DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0 V Max 0.8 V Outputs Output High Output Low –DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4 V Max 0.4 V 2mA, Z = 120 Ω INT 50pF Digital

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Chapter 4 - V.22bis Commands Chapter 4 - V.22bis Commands, S- Registers, and Result Codes The V.22bis Commands are covered in the following order in this chapter: Generic Modem Control Commands Z Soft Reset and Restore Profile +VCID Caller ID +VRID Report Retrieved Called ID \N Operating Mode - Error Correction I Identification +GCI Country of Installation &F Restore Factory Configuration (Profile) &T Local Analog Loopback Test ** Load to Internal RAM DTE/DCE Commands E Echo Q Quiet Result Code

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Chapter 4 - V.22bis Commands Error Control and Data Compression Commands +ESR Select Repeat \B Transmit Break to Remote \K Break Control Synchronous Access Mode Commands +ESA Configure Synchronous Access Submode +ITF Transmit Flow Control Thresholds Fast Connect Command $F Fast Connect Control Line Side Device Commands -TTE Threshold Adjustments for Telephony Extension -TRV Tip and Ring Voltage Measurement A Note About Compatibility Commands You may notice that some commands are available but do

Resumo do conteúdo contido na página número 12

Chapter 4 - V.22bis Commands V.22bis Generic Modem Control Commands Z Soft Reset and Restore Profile This command causes the modem to perform a soft reset and restore (recall) the factory default configuration (profile). If no is specified, zero is assumed. Syntax Z Defined Values Decimal number corresponding to the selected profile. 0 Soft reset and restore stored profile. 1 Same as 0; allowed for compatibility. Result Codes OK = 0 or 1 ERROR Otherwise +V

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Chapter 4 - V.22bis Commands 2 Selects reliable (error-correction) mode. The modem will first attempt a LAPM connection and then an MNP connection. Failure to make a reliable connection results in the modem hanging up. (Forces &Q5, S36=4, and S48=7.) 3 Selects auto-reliable mode. This operates the same as \N2 except failure to make a reliable connection results in the modem falling back to the speed buffered normal mode. (Forces &Q5, S36=7, and S48=7.) 4 Selects LAPM error-correction mode. Failu

Resumo do conteúdo contido na página número 14

Chapter 4 - V.22bis Commands &F Restore Factory Configuration (Profile) The modem loads the factory default configuration (profile). The factory defaults are identified for each command and in the S-Parameter descriptions. A configuration (profile) consists of a subset of S-Parameters. Syntax &F[] Defined Values Decimal number corresponding to the selected configuration. 0 Restore factory configuration 0. 1 Same as 0; allowed for compatibility. Result Codes OK ERROR If the mo

Resumo do conteúdo contido na página número 15

Chapter 4 - V.22bis Commands V.22bis DTE/DCE-Modem Interface commands The parameters defined in this section control the operation of the interface between the DTE/DCE and modem. E Command Echo The modem enables or disables the echo of characters to the DTE. The valid parameter value is written to S14 bit 1. Syntax E Defined Values Decimal number corresponding to the option. 0 Disables command echo. 1 Enables command echo. (Default) Result Codes OK = 0 or 1 ERROR Oth

Resumo do conteúdo contido na página número 16

Chapter 4 - V.22bis Commands X Extended Result Codes This command selects the subset of the result code messages used by the modem to inform the DTE of the results of commands. Blind dialing is enabled or disabled by country parameters. If the user wishes to enforce dial tone detection, a "W" can be placed in the dial string (see D command). The information below is based upon the default implementation of the X results table. Syntax X Defined Values Decimal number correspondin

Resumo do conteúdo contido na página número 17

Chapter 4 - V.22bis Commands n Value in ATXn Command Short Form Long Form 0 1 2 3 4 42 CARRIER 75/1200 X X X X X 46 CARRIER 1200 X X X X X 47 CARRIER 2400 X X X X X 67 PROTOCOL: V42 X X X X X 70 PROTOCOL: NONE X X X X X 83 LINE IN USE X X X X X 85 OFF-HOOK INTRUSION X X X X X 86 LINE REVERSAL DETECTED X X X X X 87 NO LINE X X X X X Note: An 'x' in a column indicates that the message (either the long form if verbose, or the value only for short form) will be generated when that particular value o

Resumo do conteúdo contido na página número 18

Chapter 4 - V.22bis Commands &R RTS/CTS Option This selects how the modem controls CTS. CTS operation is modified if hardware flow control is selected (see &K command). The parameter value, if valid, is written to S21 bit 2. Syntax &R Defined Values Decimal number corresponding to the selected option. 0 In sync mode, CTS tracks the state of RTS; the RTS-to-CTS delay is defined by S26. In async mode, CTS is normally ON and will turn OFF only if required by flow control. 1 In syn

Resumo do conteúdo contido na página número 19

Chapter 4 - V.22bis Commands +IBC In Band Commands This command provides a mechanism by which an in-band secondary channel may be implemented. This in-band secondary channel can be utilized to transparently exchange commands and responses to/from the modem during a data connection. This is an alternative approach to using the +++ escape sequence. The +IBC command also provides a mechanism to exchange V.24 signaling via the secondary channel. The primary reason the In Band Channel is implemented

Resumo do conteúdo contido na página número 20

Chapter 4 - V.22bis Commands Table of Supported V.80 Commands Command Hex Codes Description Supported V.80 DTE-to-DCE Commands <40h> The DCE decodes this as a sequence of 3 + (-1Fh). <42h> <105off> <42h> Circuit 105 is OFF. <105on> <43h> Circuit 105 is ON. <58h> The DCE decodes this as one <99h> in user data. <59h> The DCE decodes this as <99h><99h> in user data. <5Ch> The DCE decodes this as on <19h> in us


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