Chapter 4 – Voice Commands

Flow Control

XON/XOFF flow control is used by the SocketModem to match the PC-to-modem data rate to the line-signaling rate, as well as to the requirements of analog conversion of the voice signals and voice data.

In-band, uni-directional XON/XOFF flow control is mandatory. RTS/CTS (V.24 circuits 106 and 133) flow control is optional per the IS-101 standard.

Voice Mode Result Codes

In Voice mode, the modem can detect and report DTMF, detect call progress tone and cadence events, evaluate voice quality, and can monitor telco-related activities. Events can be reported as a single character (Simple or "Terse" reporting), a full-text message (Message or "Verbose" reporting), or as a repeating pattern (Pattern reporting).

Terse Verbose

0Caller ID Report

1DID Report

2Distinctive Ringing

3RING

4DTMF Received

5Receive Buffer Overrun

6Facsimile Calling (e.g., 1100 Hz)

7Data Calling (e.g., 1300 Hz)

8Local Phone On/Off Hook

9Presumed Hang Up (SILENCE) Time-out

10Presumed End of Message (QUIET) Time-out

11SIT Tone (CO Standard Information Tones, sent to pay phones)

12Bong Tone (Calling Card Tone)

13Loop Current Interruption

14Loop Current Polarity Reversal

15* Call Waiting Beep/Interrupt*

16* Distinctive Call Waiting*

17* TDD Detected (e.g., 1400/1800 Hz)*

18Ring Back/Remote Ring

19BUSY

20DIALTONE

21Reorder/Fast Busy

22V.21 Channel 2 7E Flags

23Transmit Buffer Under Run

24Extension Phone On/Off Hook

25Facsimile or Data Answer (e.g., 2100 Hz)

26Data Answer (e.g., 2225 Hz)

27Voice Detect

28Call Waiting Plus Caller ID

29Stuttered Dial Tone

30Invalid Voice Data Format

31Lost Data Detected Event

32Facsimile Answer

33-63 Reserved for future standard above 63 Manufacturer specific

_____

* Further study required for final specification.

The TIA/EIA-602 CONNECT result code is disallowed in voice mode.

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

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Multi-Tech Systems MT5634SMI V.34, MT5634SMI V.92 Flow Control, Voice Mode Result Codes, Terse Verbose, Busy Dialtone, 121
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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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