126

Chapter 4 – Voice Commands

AT+VSM=128, 7200, 128, 0; +VEM=FFFFFFFF8; +VSD=128, 50

OK	The modem agrees.

AT+VSM=129, 7200, 0, 0 The PC changes its PC/modem interface rate to 38400 bps and selects a compression method with the least sensitive setting, with the goal of playing a message with less distortion, and at 7200 samples per second. (Assume that the PC issued a +VSM=? command earlier.)

OK	The modem agrees.
AT+VLS=4	The modem selects the speaker. The modem had earlier reported that a
	speaker was available.
OK	The modem agrees.
AT+VTX	The PC selects the Voice Transmit mode.
CONNECT	The modem agrees.
<Data>	The PC delivers <DLE> shielded and silence compressed voice data across the
	PC/modem interface.
<DLE> <ETX>	The PC indicates the end of the Voice data stream.
OK	The modem indicates it is in Voice Command mode.
AT+VLS=0	The PC deselects all devices.
OK	The modem agrees.
	The PC switches to Data mode, Command mode, and autobauding enabled:
	AT+VIT=0; +VPR=0; +FCLASS=0
OK	The modem agrees.

Answer Phone, Play Greeting Message, and Record Message Example

Command	Response
AT+FCLASS=8;	The DCE switches to Voice mode. The DTE selects a fixed
AT+VIT=60;	DTE-DCE interface rate. The DTE knows from the sample
+VPR=16	rate selected earlier and the bits-per-sample that the DTE-DCE interface rate
	should be 38400 bps. The DTE-DCE Inactivity Timer starts with 60 seconds.
OK	DCE agrees (to the old DTE/DCE interface rate).

AT+VSM=129, 7200, 0, 0 DTE changes its DTE/DCE rate to 38400 bps and selects a compression method with the least sensitive setting, with the goal of recording a message with less distortion, and at 7200 samples per second. Assume that the DTE issued a +VSM=? command earlier.

OK	The DCE agrees.
AT+VSD=127, 20 DTE selects a silence detection period of 2 seconds.
AT+VLS=0	DTE selects a silence detection period of 2 seconds with the least sensitive
	setting (for detecting the end of voice recording).
OK	The DCE agrees.
AT+VIT=0;	The DTE selects the Data mode with autobauding, and disables +VPR=0;
	automatic DCE answering. The DCE waits for a phone call.
+FCLASS=0	(not necessarily in Data mode).
S0=0
OK	The DCE agrees.
RING	At some time, a remote station calls.
AT+FCLASS=8;	The DCE switches to Voice mode. The DCE selects a fixed AT+VIT=60;
	DTE/DCE Interface Rate. The DTE knows from the sample AT+VPR=16; 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).
AT+VLS=0	The DTE selects all devices.

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

126 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.

Multi-Tech Systems MT5634SMI V.92, MT5634SMI V.34 manual 126

Models: MT5634SMI V.34 MT5634SMI V.92

AT+VLS=4

AT+VLS=0

Command

AT+FCLASS=8;

AT+VIT=0;

AT+FCLASS=8;

MT5634SMI V.34, MT5634SMI V.92 specifications