Chapter 3 – Fax Class 2 Commands

Chapter 3 – Fax Class 2 and 2.0/2.1

Commands

Introduction

This chapter summarizes the fax Service Class 2 and Service Class 2.0/2.1 command sets as implemented in Multi-Tech Systems, Inc. modems. The Service Class 2.0 command set applies to facsimile communications at speeds up to 14 400 bits per second (bps). The Service Class 2.1 command set is a modification of the Class 2.0 command set for facsimile communications at V.34 speeds up to 33 600 bits per second (bps), as documented in ITU-T T.32 Amendment 1. Because the two command sets differ only in subparameter values for a few Class 2.1 commands, they are treated here as a single Class 2.1 command set with differences noted as appropriate.

The Multi-Tech implementation of Class 2.1 follows ITU-T Recommendation T.32 as amended, except for a few subparameter values. Again, differences are noted as appropriate.

This Chapter also summarizes the Multi-Tech implementation of the Service Class 2 command set, which was based on EIA proposed standard TIA-592 (August 1990). The complete Multi-Tech Class 2 Developer’s Kit can be downloaded from http://www.multitech.com/DOCUMENTS/manuals/82006502.pdf. EIA/TIA documents can be purchased from Global Engineering Documents at http://global.ihs.com/.

Please note that the Class 2 and Class 2.0 commands though similar in outline are sometimes quite different in detail. Class 2 is a proposed early version of Class 2.0 that was never approved, but was widely implemented by modem manufacturers. As a result, all implementations of Class 2 are non- standard and manufacturer-specific. Class 2.0 is the version of Class 2 that was approved by the ITU after substantial changes to the original proposal. Major changes include a shortening of command names to three characters, a change from decimal values to hexadecimal values, the elimination of some commands, and the addition of others.

This chapter is organized so that Class 2 commands are described with and compared to the equivalent Class 2.1 commands.

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C)

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Multi-Tech Systems MT5634SMI V.92, MT5634SMI V.34 manual Fax Class 2 and 2.0/2.1 Commands
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MT5634SMI V.34, MT5634SMI V.92 specifications

The Multi-Tech Systems MT5634SMI is a versatile and robust external modem designed to cater to a variety of communication needs. As a V.92/V.34 standard modem, it provides reliable and efficient data connections for both home and business users. Its unique blend of features and technologies makes it an excellent choice for users looking to achieve optimal performance in their data transmission.

One of the standout features of the MT5634SMI is its support for the V.92 standard, which offers faster throughput and enhanced performance compared to prior standards. With V.92, users can experience download speeds of up to 56 Kbps and upload speeds reaching 48 Kbps. This improved speed is particularly beneficial for users who frequently download large files or engage in data-intensive activities.

The modem also includes the V.34 technology, which further enhances its capabilities by improving connection reliability and data integrity over various line conditions. Utilizing advanced error correction and data compression techniques, the V.34 modem ensures a smoother and faster communication experience. This makes it ideal for users in areas with fluctuating line quality or those who require stable connections for online conferencing or telecommuting.

In terms of form factor, the MT5634SMI is an external modem, which allows for easy installation and portability. Its compact design ensures it can fit into any workspace without taking up much room or adding clutter. The modem connects to computers via standard serial ports, making it compatible with a wide range of devices, both modern and legacy.

Additional features of the MT5634SMI include built-in diagnostics to assist troubleshooting and ensure smooth operation. It supports multiple operating environments, catering to users operating on various systems, providing versatility for both home and office settings. The modem's compatibility with popular operating systems guarantees that users can easily integrate it into their existing setups without a hassle.

In conclusion, the Multi-Tech Systems MT5634SMI V.92/V.34 modem stands out as a reliable choice for anyone needing high-speed internet connectivity. With its strong feature set, enhanced technologies, and user-friendly design, it is an asset for enhancing communication and data transfer capabilities. Whether for personal use or business applications, the MT5634SMI delivers performance and reliability, making it a valuable addition to any technology arsenal.
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