Data Addendum

Host-Based Controller Modem

June 15, 1998

AT Command Set

 

 

AT Command Reference (continued)

 

\Tn Inactivity Timer

 

This command specifies the length of time (in minutes) that the modem will wait before disconnecting when no data is sent or received. A setting of zero disables the timer. Alternatively, this timer may be specified in register S30. This function is only applicable to buffer mode.

 

\T0:

 

Inactivity timer disabled (default).

Result Codes:

 

 

 

 

OK

 

n = 0 - 255

 

ERROR

Otherwise

\Vn

Protocol Result Code

\V0:

Disable protocol result code appended to DCE speed.

\V1:

Enable protocol result code appended to DCE speed (default).

\V2:

Same as \V1.

 

Result Codes:

 

 

 

OK

n = 0, 1

 

 

ERROR

Otherwise

\Xn

XON/XOFF Pass Through

\X0:

 

Modem process XON/XOFF flow control characters locally (default).

\X1

 

Modem passes XON/XOFF flow control characters.

Result Codes:

 

 

 

OK

 

 

n = 0, 1

ERROR

Otherwise

-Cn

Data Calling Tone

Data Calling Tone is a tone of certain frequency and cadence as specified in V.25 which allows remote Data/FAX/Voice discrimination. The frequency is 1300 Hz with a cadence of .5 s on and 2 s off.

-C0:

Disabled (default).

-C1:

Enabled.

Result Codes:

 

 

OK

 

n = 0, 1

ERROR

Otherwise

-V90 = <n>

 

command to enable/disable V.90 and change downstream rate

-V90=0 will disable V.90

-V90=1 will enable V.90 Auto Rate (default value) -V90=X - controls the downstream rate

-V90? - Shows the current value -V90=? - Shows the range [0-21]

See next page for the values of n.

Version 1.0

Lucent Technologies Inc.

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Lucent Technologies Host-Based Controller Modem AT Tn Inactivity Timer, Vn Protocol Result Code, Xn XON/XOFF Pass Through

Host-Based Controller Modem AT specifications

Lucent Technologies Host-Based Controller Modem AT represents a significant advancement in modem technology, particularly in the realm of telecommunications and data transmission. This modem, renowned for its efficiency and versatility, is characterized by a host-based architecture, which differentiates it from traditional modems that rely heavily on dedicated hardware.

One of the main features of the Lucent Technologies Host-Based Controller Modem AT is its ability to leverage the processing power of the host computer. By utilizing the host's CPU for data encoding and decoding tasks, the modem can reduce the need for specialized hardware components, allowing for a more cost-effective solution. This design not only facilitates lower manufacturing costs but also enhances the overall performance due to the utilization of the host's computational capabilities.

Another notable characteristic is its compliance with the AT command set, which standardizes communications between the modem and the host system. This ensures compatibility with a wide range of software applications and operating systems. The AT command set allows users to control modem functions easily, making it simpler to configure settings, initiate connections, and manage data transfer processes.

The modem also supports various communication protocols, such as V.90 and V.92, enabling high-speed data transmission over traditional telephone lines. With download speeds of up to 56 Kbps and upload speeds of up to 48 Kbps, the Lucent Technologies Host-Based Controller Modem AT is particularly suitable for Internet browsing, email, and other online activities demanding robust data throughput.

Additionally, the modem features built-in error correction and data compression protocols, such as V.42 and V.44, further enhancing the quality and speed of data transmission. These protocols help minimize the impact of line noise and ensure efficient use of bandwidth, leading to improved connection stability and data integrity.

In terms of connectivity, the Lucent Technologies Host-Based Controller Modem AT typically interfaces via a standard serial or USB port, making it compatible with most modern computers. Its compact design and ease of installation make it an appealing choice for both personal and professional use.

Overall, the Lucent Technologies Host-Based Controller Modem AT showcases significant innovation in modem technology, offering users a reliable and efficient solution for high-speed data communications. Its host-based architecture, adherence to the AT command set, and support for advanced communication protocols position it as a vital tool in the ever-evolving landscape of digital connectivity.