Host-Based Controller Modem

Data Addendum

AT Command Set

June 15, 1998

 

 

AT DSVD Commands

In order to use the DSVD without a local phone, a ring 3 application can be used to simulate the local phone. In the absence of such an application, the voice connection needs to be auto enabled. This is accomplished by the following DSVD custom AT commands:

Command

Description

AT-SSE-OF

Simulates virtual offhook event.

 

 

AT-SSE-ON

Simulates virtual onhook event.

AT-SSE-AC

Enables auto call whereby the voice channel is established as soon as the connection

 

is made with the DSVD modem. There is a single request for each new call.

 

**Both sides can be programmed in this mode and the voice channel will be activated

 

by one of the modems. The voice channel will stay enabled until the line is dropped.

AT-SSE-AA

Enables Auto Answer mode allowing the modem to always accept and answer the

 

voice channel request.

 

 

AT-SSE-AM

Enables Auto Multiple Call mode allowing a new connection every 30 seconds with a

 

5 second delay between calls.

AT-SSE- A -

Cancels Auto mode

AT-SSE-&W

Writes system audio parameters into the VoiceEeprom registry.

AT-SSE-&R

Reads the current registry parameters from the VoiceEeprom registry.

AT-SSE-SN

Sets silence detection as default mode

AT-SSE-SF

Disables silence detection for the modem

 

 

AT-SSE-FN

Sets full duplex mode (with headset) as default

 

 

AT-SSE-FF

Disables full duplex mode (with speakerphone), reverting to half duplex mode as

 

default

AT-SSE+VGT=

Sets speakerphone gain level

 

= ?

Displays range available

 

?

Displays current setting

AT-SSE+VGR=

Sets microphone gain level

 

= ?

Displays range available

 

?

Displays current setting

 

 

Standard AT Commands

AT-SSE=

= 0 Disables DSVD

 

= 1 Enables DSVD

 

=? Displays range available

 

? Displays current setting

ATD

Initiates transition from voice to DSVD

ATH

Hang up modem

AT+VNH=

Used in conjunction with ATH command for hook control:

 

= 0

the DCE will hang up the line when it does not detect a carrier

 

= 2 the DCE will remain offhook when it detects no carrier to allow the DTE to switch

 

the DCE to another mode

 

 

AT+VIT=

= x to set the inactivity timer

56

Version 1.0

Lucent Technologies Inc.

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Lucent Technologies Host-Based Controller Modem AT specifications AT Dsvd Commands
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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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