AT ACU

Using the

The escape state is entered by sending the escape character three consecutive times. The escape character is selectable as any ASCII character. Its value is stored in S-Register 2, and the default is “+” (decimal 43). To disable escape command detection, set S-Register 2 to a value greater than 127.

A guard time is used with the escape sequence. A guard time must precede and follow the sequence of escape characters to prevent the +++ characters from inadvertently placing the modem into command mode if they are transmitted in a message. If data is sent within the guard time, the escape sequence is not detected. The default guard time is one second.

The guard time specified by S-Register 12 also specifies the maximum time between the three consecutive escape characters. If more than the allowable time elapses between escape characters, the escape sequence is ignored. Setting S-Register 12 to zero disables the guard time, so that the rate at which you enter the escape sequence is not a factor.

To use the escape sequence with guard time:

1)Pause a bit longer than the guard time.

2)Send +++, ensuring the delay between +’s is less than the specified guard time.

When a valid escape sequence is detected, the modem responds with

OK

Do not send commands until the OK response has been received. A command that is sent too soon may not be interpreted correctly.

3)Pause again, a bit longer than the guard time.

4)Enter commands to the modem.

5)When you are ready to resume the call to the remote system, type ATO<CR>. The modem returns to the online state.

When using error correction, if you “escape” from the data state to the command state, the modem buffers any data received from the remote site. When you return online (to data state), the buffered data is sent to the DTE.

Non-Configuration AT Commands

Most AT commands cross-reference to a front panel option. Some AT commands are intended only for immediate modem action. These commands allow you to perform

anumber of the important day-to-day modem functions, such as:

•Re-execute your last command

•Answer an incoming call

•Dial a telephone number

•Hang up

•Exit command mode, return to data mode

•Redial the last telephone number

5-6 Using the AT Automatic Calling Interface

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Telenetics V.32bis Series, V.34-SDC, 326X V.34 Non-Configuration AT Commands, To use the escape sequence with guard time
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326X V.34, V.32bis Series, V.34-SDC specifications

Telenetics has been a key player in the field of telecommunications, offering advanced modem solutions that cater to diverse communication needs. Among their notable products are the V.34-SDC and V.32bis series, including the 326X V.34 modem. These modems have been designed to enhance data transmission reliability and speed in various applications.

The Telenetics V.34-SDC modem represents a significant leap in technology, supporting data rates of up to 28.8 Kbps. This modem utilizes the advanced V.34 modulation scheme, which optimizes the use of existing telephone lines to deliver impressive performance, especially for users requiring high-speed data transmission. The V.34-SDC model also features robust error correction and data compression techniques, ensuring that users receive accurate data even over less than ideal connections. With its extended line-conditioning capabilities, the V.34-SDC modem can efficiently handle long distances and poor line conditions.

Equally noteworthy is the V.32bis series, which provides backward compatibility with V.32 modems, enabling seamless integration into existing systems. Capable of speeds up to 14.4 Kbps, the V.32bis modems are ideal for businesses and environments where legacy systems remain in use. It features adaptive equalization and advanced echo cancellation, ensuring a clear signal is maintained throughout the data transmission process. This versatility allows users to connect with various devices across different infrastructures.

The 326X V.34 modem further exemplifies Telenetics' commitment to high performance. It combines the V.34 capabilities with enhanced security features, offering users encryption options for sensitive data. This is particularly crucial for businesses that need to safeguard their information against potential vulnerabilities during transmission. The 326X also supports various data communication protocols, making it adaptable for multiple platforms and applications.

In summary, Telenetics’ V.34-SDC, V.32bis series, and 326X V.34 modems stand out for their high-speed data transmission, compatibility, advanced error correction, and security features. These technologies make them excellent choices for both enterprise and networking applications where reliable communication is vital. Telenetics continues to innovate, delivering modem solutions that meet the evolving demands of the telecommunications landscape.
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