Chapter 3 – Fax Class 2 Commands

Session Message Report Responses

The modem may be commanded to report the T.30 Phase B and Phase D HDLC control frames as they are sent and received. This service supports session diagnostics and the debugging of host software. It is enabled by the +FBU parameter described in the Parameter Commands section of this chapter.

These messages are not generated in direct execution of host action commands; they are generated for each frame whenever the reported frame is sent or received. The host should not attempt to change serial port speed or parity with +FBU set. It is desirable to suppress echo of host commands, if the modem provides that facility.

The data will be reported with each T.30 command separated by <CR><LF>. The fill bits will be removed. The frame octets will be represented in hex notation, and separated by spaces. Flags and zero bits are removed. Frame octets are reported in the order sent or received. FCS bytes are deleted. Frame octets are presented with the LSB as the first bit sent or received.

The following is an example of a received DIS string report:

+FHR: FF 13 80 00 4E 78 FE AD<CR><LF>

Unless specified otherwise, the modem reports these frames before the corresponding responses are generated. For example, the above examples would occur before the standard +FIS: report was made.

Report Transmit HDLC Frames, +FHT:

Syntax: +FHT:<transmitted HDLC frame octets>

Reports the HDLC data that was sent by the modem.

Report Received HDLC Frames, +FHR:

Syntax: +FHR:<received HDLC frame octets>

Reports the HDLC data that was received by the modem.

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

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Multi-Tech Systems MT5634SMI V.34, MT5634SMI V.92 manual Session Message Report Responses, Report Transmit Hdlc Frames, +FHT

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.