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)

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

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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.

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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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