Chapter 1 – AT Commands, S-Registers and Result Codes

V.92 Commands

 

 

 

Command:

+MS= Modulation Selection

 

 

 

Values:

 

See description.

 

 

 

Defaults:

 

See description.

 

 

 

Description:

 

This extended-format command selects modulation, enables or disables automode,

 

 

and specifies the highest downstream and upstream connection rates using one to

 

 

four subparameters.

 

 

 

 

 

The command syntax is

 

 

 

 

 

+MS=[mod][,[automode][,[0][,[max_rate][,[0][,[max_rx_rate]]]]]]<CR>

 

 

Subparameters that are not entered retain their current value. Commas separate

 

 

optional subparameters, and must be inserted to skip a subparameter. Example:

 

 

+MS=,0<CR> disables automode and keeps all other settings at their current

 

 

values.

 

 

 

 

 

+MS=? Reports supported options in the format (list of supported mod values),(list of

 

 

supported automode values),(0),(list of supported max_rate values),(0),(list of

 

 

supported max_rx_rate values). Example: +MS: (BELL103, V21, BELL212A, V22,

 

 

V22B, V23C, V32, V32B, V34, V90, V92), (0, 1), (0), (0-33600), (0), (0-56000)

 

+MS? Reports current options in the format mod, automode, 0, max_rate, 0, max_rx_rate.

 

 

Example: +MS: V92, 1, 0, 31200, 0, 56000.

 

 

Subparameters

 

 

 

 

mod Specifies the preferred modulation (automode enabled) or the modulation to use in

 

 

originating or answering a connection (automode disabled). The default is V92.

 

 

 

 

 

 

 

 

 

mod

Modulation

Possible rates (bps)1

 

 

 

 

 

 

 

 

 

V922

V92

56000, 54666, 53333, 52000, 50666, 49333,

 

 

 

 

 

 

48000, 46666, 45333, 44000, 42666, 41333.

 

 

 

 

 

 

40000, 38666, 37333, 36000, 34666, 33333,

 

 

 

 

 

 

32000, 30666, 29333, or 28000

 

 

 

V903

V.90

56000, 54666, 53333, 52000, 50666, 49333,

 

 

 

 

 

 

48000, 46666, 45333, 44000, 42666, 41333.

 

 

 

 

 

 

40000, 38666, 37333, 36000, 34666, 33333,

 

 

 

 

 

 

32000, 30666, 29333, or 28000

 

 

V34

V.34

33600, 31200, 28800, 26400, 24000,

 

 

 

 

 

 

21600,19200, 16800, 14400, 12000, 9600, 7200,

 

 

 

 

 

 

4800, or 2400

 

 

 

V32B

V.32bis

14400, 12000, 9600, 7200, or 4800

 

 

 

V32

V.32

9600 or 4800

 

 

 

 

V22B

V.22bis

2400 or 1200

 

 

 

V22

V.22

1200

 

 

 

 

V23C

V.23

1200

 

 

 

 

V21

V.21

300

 

 

 

 

Bell212A

Bell 212A

1200

 

 

 

 

Bell103

Bell 103

300

 

 

N o t e s :

1. See optional <automode>, <max_rate>, and <max_RX_rate> subparameters.

2. Selects V.92 modulation as first priority. If a V.92 connection cannot be established, the modem attempts V.90, V.34, V.32bis, etc.

3. Selects V.90 modulation as first priority. If a V.90 connection cannot be established, the modem attempts V.34, V.32bis, etc.

automode An optional numeric value that enables or disables automatic modulation negotiation using V.8 bis/V.8 or V.32 bis Annex A. Automode is disabled if values are specified for the max_rate and max_rx_rate parameters. The options are:

0Disable automode

1Enable automode (default)

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

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Multi-Tech Systems MT5634SMI V.92 manual Commands, Command +MS= Modulation Selection, Modulation Possible rates bps1
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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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