Host-Based Controller Modem

Data Addendum

AT Command Set

June 15,

1998

 

 

 

AT Command Summary

The following tables summarize the commands implemented by the modem. Commands may be executed when the modem is in COMMAND mode. COMMAND mode is entered upon under one of the following conditions:

✟After power up

✟At the termination of a connection

✟After the execution of a command other than dial or answer commands (ATO or AT&T)

✟Upon the receipt of the ESCAPE SEQUENCE (three consecutive characters matching the contents of S register 2) while on-line mode

✟Upon the on-to-off transition of DTR if &D1, &D2, or &D3 has been set

Table 1. AT Command Set Summary

Command

Description

Command

Description

 

 

 

 

A/

Repeat last command

&J

Auxiliary relay options

A

Answer command

&K

Local flow control selection

B

Communication standard setting

&M

Asynchronous communications mode

 

 

 

 

C

Carrier control

&Q

Asynchronous communications mode

D

Dial command

&S

Data set ready (DSR) option

E

Echo command

&T

Self-test commands

F

On-line data character echo command

&V

View the active configuration

H

Hook control

&W

Store current configuration

I

Request ID information

&Y

Select stored profile for hard reset

L

Monitor speaker volume

&Z

Store telephone number

M

Monitor speaker mode

\A

MNP block size

 

 

 

 

N

Modulation handshake

\B

Send break

O

Return to on-line data mode

\G

Modem port flow control

P

Select pulse dialing

\J

Adjust bits/s rate control

Q

Result code control

\K

Set break control

T

Select tone dialing

\N

Error control mode selection

V

DCE response format

\Q

Local flow control selection

W

Result code option

\R

Ring indicator off after answer

X

Result code selection and call progress

\T

Inactivity timer

 

monitoring

 

 

Y

Long-space disconnect

\V

Protocol result code

Z

Reset and recall stored profile

\X

XON/XOFF pass through

&B

V.32 auto retrain

%B

View numbers in blacklist

 

 

 

 

&C

Data carrier detect (DCD) control

%C

Data compression control

&D

Data terminal ready (DTR)

%E

Automatic rate change

&F

Local factory settings

-C

Data calling tone

&G

V.22bis guard tone control

-V90

Enable/disable V.90 settings

2

Version 1.0

Lucent Technologies Inc.

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Lucent Technologies Host-Based Controller Modem AT specifications AT Command Summary, AT Command Set Summary Description
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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.
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