n = 0
n = 1, 3, 6 Otherwise

Host-Based Controller Modem

Data Addendum

AT Command Set

June 15, 1998

 

 

AT Command Reference (continued)

 

&Sn

Data Set Ready (DSR) Option

This command selects DSR action.

&S0:

DSR always ON

(default).

&S1:

DSR comes on when establishing a connection and goes off when the connection ends.

Result Codes:

 

 

OK

 

n = 0, 1

ERROR

Otherwise

&Tn

Self-Test Commands

This command allows the user to perform diagnostic tests on the modem. These tests can help to isolate problems when experiencing periodic data loss or random errors.

 

&T0

Abort. Stops any test in progress.

 

&T1

Local analog loop. This test verifies modem operation, as well as the connection

 

between the modem and computer. Any data entered at the local DTE is modulated, then

 

demodulated, and returned to the local DTE. To work properly, the modem must be off-line.

&T3

Local digital loopback test.

&T6

Remote digital loopback test. This test can verify the integrity of the local modem, the communications

 

link, and the remote modem. Any data entered at the local DTE is sent to, and returned from, the

 

remote modem. To work properly, the modems must be on-line with error control disabled.

Result Codes:

OK

CONNECT

ERROR

16

Lucent Technologies Inc.

Version 1.0

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Lucent Technologies Host-Based Controller Modem AT Data Set Ready DSR Option, Self-Test Commands, Connect Error

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.