Chapter 4 – Voice Commands

OK

The DCE agrees.

AT+VIT=0;

The DTE selects Data mode/Command mode with

+VPR=0;

autobauding, and disables automatic DCE answering. The +FCLASS=0; DCE

 

waits for a phone call (not necessarily in Data mode).

S0=0

 

AT+FCLASS=8;

The DCE switches to Voice mode. The DCE selects a fixed

 

DTE/DCEAT+VIT=60;

AT+VPR=16;

Interface Rate. The DTE knows from the sample rate selected earlier and the bits

 

per sample that the DTE/DCE Interface Rate should be 38400 baud. The

 

DTE/DCE Inactivity Timer starts with a value of 60 seconds.

OK

The DCE agrees (at the old DTE/DCE Interface Rate).

<DLE> <R>

The DCE selects another ring (at 38400 bps).

AT+VLS=2

The DCE answers the phone.

OK

The DCE indicates that it is in Voice Command mode.

AT+VTX

The DTE selects Voice Transmit mode.

CONNECT

The DCE agrees.

<Data>

The DTE plays the welcome message.

<DLE> <ETX>

The DTE indicates the end of the data stream.

OK

The DCE indicates that it is in Voice Command mode.

AT+VTS= {933, 0, 12} The DTE annotates the greeting message with a 1.2 sec. beep.

OK

The DCE is ready for another Voice command.

AT+VSM=132, 7200, 0, 0 The DTE selects a low bit compression scheme to save disk space.

OK

The DCE agrees.

AT+VRX

The DTE selects the Voice Receive mode.

CONNECT

The DCE agrees.

<Data>

The DCE delivers <DLE> shielded and silence-compressed voice data across

 

the DTE/DCE interface.

<DLE> <NUL>

The DTE strokes the Inactivity Timer.

<DLE> </>

The DCE reports the start of a possible DTMF tone.

<DLE> <5> <DLE> <5> The DCE reports a DTMF 5 detection for 140 milliseconds (within a 70 millisecond resolution).

<DLE> <->

The DCE reports the end of the DTMF 5 detection. For this example, DTMF 5

 

means "finish with the voice message, and switch to fax mode".

<DLE> <!>

The DTE wishes to end the record by sending an abort command.

<DLE> <ETX>

The DCE indicates the end of the Voice data stream, and returns to Voice

 

Command mode.

AT+VNH=1

The DTE selects to disable automatic hang-ups while in Service Class 2 +VIT=0

 

(+FSK command result codes in Telco on-hook). The DTE switches the

 

+FCLASS=2 DCE to Service Class 2 fax mode.

OK

The DCE agrees.

ATA

The DCE starts the fax receive process.

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

127

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Multi-Tech Systems MT5634SMI V.34, MT5634SMI V.92 manual 127
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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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