Host-Based Controller Modem

 

 

Data Addendum

AT Command Set

 

 

 

June 15, 1998

 

 

 

 

 

V.80 AT Commands (continued)

 

 

 

Table 10. V.80 AT Commands (continued)

 

 

 

Command

Sub-

 

Values

Description

 

parameters

 

 

 

 

 

 

 

 

+ESA=[<trans_idle>[,<framed

trans_idle

0

In transparent sub-

 

_idle>[,,,<crc_type>[,<nrzi_en

 

mode, DCE transmits

 

>]]]]

 

marks (ones) on idle.

 

 

framed_idle

0

In Framed sub-

 

 

 

mode, DCE transmits

 

 

 

HDLC flags on idle.

 

 

 

1

In Framed sub-

 

 

 

mode, DCE transmits

 

 

 

marks (ones) on idle.

 

 

crc_type

0

Disable CRC

 

 

 

generation and checking

 

 

 

1

In Framed sub-

 

 

 

mode, the 16 bit CRC

 

 

 

specified in V.42 is

 

 

 

generated by the DCE in

 

 

 

the transmit direction and

 

 

 

checked by the DCE in the

 

 

 

receive direction.

 

 

nrzi_en

0

Disable NZRI

 

 

 

encoding and decoding.

 

+ESA?

 

 

 

Read Syntax command to

 

 

 

 

query the current values of the

 

 

 

 

+ESA sub-parameters

+ESA=?

 

 

 

Test Syntax command to

 

 

 

 

obtain all supported values of

 

 

 

 

the +ESA sub-parameters

+ITF= [<off>[, <on>]]

<off>

Determines the threshold,

Transmit Flow Control

 

 

in octets, above which the

Thresholds. This command

 

 

DCE shall generate a flow

allows the DTE to determine

 

 

off signal.

the input buffer size in the

 

 

 

 

DCE for data on circuit 103

 

<on>

Determines the threshold,

from the DTE, to control the

 

 

in octets, below which the

thresholds used for flow

 

 

DCE shall generate a flow

control of such data.

 

 

on signal.

 

+ITF=?

 

 

 

The DCE shall transmit a

 

 

 

 

string of information to the

 

 

 

 

DTE consisting of : ITF: (list of

 

 

 

 

supported <off> values>),(list

 

 

 

 

of supported <on> values.

 

 

 

 

 

60

Lucent Technologies Inc.

Version 1.0

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Lucent Technologies Host-Based Controller Modem AT specifications Idle,,,crctype,nrzien, +Esa=?, +ITF= off, on, +Itf=?
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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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