Lucent Technologies Host-Based Controller Modem AT AT+FCLASS=0, Connect, AT+VLS=1, Dleetx

Models: Host-Based Controller Modem AT

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Data Addendum

Host-Based Controller Modem

June 15, 1998

AT Command Set

 

 

AT Voice Commands Reference (continued)

 

Example # 5: Receiving an incoming data call in speakerphone or TAD mode and switching to data mode

In this example, the sequence begins at the point of the user or telephone answering device (TAD) taking the speakerphone off-hook and detecting a data calling tone from the other end.

Command

Description

<DLE>-e

DCE detects data calling tone from the remote modem and informs the

 

application by sending DLE-e sequence.

AT+FCLASS=0

Application switches modem out of voice mode, and into data mode.

OK

DCE responds. Now in data mode, still off-hook and connected to incoming call.

ATA

Application instructs modem to answer data call using standard AT commands.

CONNECT

DCE responds. The call is answered, and modem continues with procedures to

 

establish connection.

Example # 6: Switching from speakerphone mode to TAD mode

In this example, the sequence begins at the point of the user in speakerphone mode and at some point in time wants to put the other end in hold. The application may switch to TAD mode in hold state and play some music wave file to the line.

Command

Description

AT+VLS=1

Applications switches modem out of speakerphone mode and into TAD mode.

OK

DCE responds. Now in TAD mode.

AT+VTX

DTE selects voice transmit mode.

CONNECT

DCE responds.

<Data>

DTE plays music through modem to remote caller.

<DLE><ETX>

DTE indicates end of voice transmit data.

OK

DCE acknowledges switch back to voice command state.

The Application may switch back to speakerphone mode by following the example to switch from TAD mode to speakerphone mode.

Example # 7: Call screening & recording a message using TAD - IS101 <dle> shielded method.

The TAD application is loaded. The modem is initially idle, in data mode (+FCLASS=0).

Command

Description

RING

DCE reports ringing from remote station.

AT+FCLASS=8

The modem enters voice mode.

OK

DCE responds.

AT+VGT=128

Set speaker volume to normal.

OK

DCE responds.

AT+VSM=132,8000

DTE selects IMA ADPCM with 8.0 kHz sampling rate.

OK

DCE responds.

Version 1.0

Lucent Technologies Inc.

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Lucent Technologies Host-Based Controller Modem AT specifications AT+FCLASS=0, Connect, AT+VLS=1, Dleetx

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.