Host-Based Controller Modem

Data Addendum

AT Command Set

 

June 15, 1998

 

 

AT Voice Commands Reference (continued)

 

AT+VSD=128,0

DTE selects normal silence detection sensitivity, and a silence detection interval

 

of 0 seconds. Disable silence detection.

 

OK

DCE responds.

 

<DLE>-R

DCE detects another ring, and notifies DTE.

 

AT+VLS=1

The modem answers the call.

 

OK

DCE is off-hook.

 

The TAD next plays its greeting message, issues a beep, and records the caller's message.

Command

Description

AT+VTX

DTE selects voice transmit mode.

CONNECT

DCE responds.

<Data>

DTE plays greeting through modem to remote caller.

<DLE><ETX>

DTE indicates end of voice transmit data.

OK

DCE acknowledges switch back to voice command state.

AT+VTS=[933,0,120]

DTE annotates greeting message with a 1.2 second beep.

OK

DCE responds.

AT+VSD=128,50

DTE selects normal silence detection sensitivity and a silence detection interval

 

of 5 seconds. Enable silence detection.

OK

DEC responds.

AT+VLS=5

The speaker is attached to the system, and the modem is off-hook.

OK

DCE is off-hook.

AT+VRX

DTE selects voice receive mode.

CONNECT

DCE agrees.

<Data>

DCE delivers <DLE> shielded voice message to DTE.

The caller leaves a message, and hangs up. The modem detects silence for a specified period of time, and then notifies the DTE that the message being recorded has ended.

Command

Description

<DLE>-s

DCE issues presumed end of message after silence detection interval has

 

elapsed.

<DLE>-!

DTE signals end of voice receive state.

<DLE><ETX>

DCE ends voice transmission to DTR, with this code, and returns back to voice

 

command state.

ATH

DTE issues standard command to terminate call. Speakerphone goes on-hook,

 

speaker and microphone are detached from system, and modem returns to data

 

mode (+FCLASS=0).

OK

DCE responds.

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Lucent Technologies Inc.

Version 1.0

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Lucent Technologies Host-Based Controller Modem AT specifications Dle-R, AT+VLS=5

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.