Host-Based Controller Modem

Data Addendum

AT Command Set

June 15, 1998

 

 

AT Commands for Homologation Testing and Debugging

This section lists the homologation testing and debugging commands and homologation parameter values for different countries.

Table 11. The Homologation Testing and Debugging Commands

Name

Description

Value

Comments

%Txx

Test Commands

¾

AT%T<val>.

 

 

01

Data voice relay on

 

 

02

Data voice relay off

 

 

03

Caller-ID relay on

 

 

04

Caller-ID relay off

 

 

05

Audio codec on

 

 

06

Audio codec off

 

 

07

Shunt relay on

 

 

08

Shunt relay off

 

 

09

ac off-hook relay on

 

 

10

ac off-hook relay off

 

 

11

Loop limit on

 

 

12

Loop limit off

 

 

13

Loop VI on

 

 

14

Loop VI off

 

 

15

Ring impedance on

 

 

16

Ring impedance off

 

 

17

—

 

 

18

—

 

Write to EEPROM

19

AT%T19, <loc>, <val> (<loc> and <val>

 

 

 

are in hex)

 

Read from EEPROM

20

AT%T20, <loc> (<loc> is in hex).

 

Modify homologation parameter

21

AT%T21, <param#>, <param_value>

 

 

 

(<param#> and <param_value> are in

 

 

 

hex as defined in the parameters table).

 

Read homologation parameter

22

AT%T22, <param#> (<param#> is in hex

 

 

 

as defined in the parameters table).

 

Generate DTMF 0 - 9

23¾32

—

 

Generate DTMF *

33

—

 

Generate DTMF #

34

—

 

Generate DTMF A - D

35¾38

—

 

V.25 answer tone (2100Hz)

39

—

 

V.25 data calling tone (1300Hz)

40

—

 

FAX calling tone (1100Hz)

41

—

 

1800Hz guard tone

42

—

 

V.21 channel 1 mark symbol originate

90

Set S37 = 3, ATB0

 

V.21 channel 1 mark symbol answer

91

Set S37 = 3, ATB0

 

V.21 channel 1 space symbol originate

92

Set S37 = 3, ATB0

 

V.21 channel 1 space symbol answer

93

Set S37 = 3, ATB0

 

V.23 originate channel mark symbol

90

Set S37 = 2

 

V.23 answer channel mark symbol

91

Set S37 = 2

 

V.23 originate channel space symbol

92

Set S37 = 2

 

V.23 answer channel space symbol

93

Set S37 = 2

61

Version 1.0

Lucent Technologies Inc.

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Lucent Technologies Host-Based Controller Modem AT specifications AT Commands for Homologation Testing and Debugging
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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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