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Lucent Technologies Host-Based Controller Modem AT specifications

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 # 2: Initiating a stored number speakerphone call

The speakerphone application is loaded. The modem is initially idle, in data mode. The user then decides to place a speakerphone call either by entering the number without going off-hook first or selecting a number previously stored in the application. When the user tells the application to dial, the following events occur:

Command

Description

ATD5551234;

Provide a dial string appended with a semicolon (;) for the DCE to place the call

 

and go to command mode.

OK

The DCE responds, and the number is dialed.

The call is placed through the phone network in data mode. The modem stays in command mode, and the

application should wait for the OK before sending next command.

Command

Description

AT+FCLASS=8

Put the modem into voice mode.

OK

DCE responds: The modem is now in voice mode.

AT+VGT=128

Set the speaker volume to normal level.

OK

DCE responds: The volume level is set.

AT+VLS=7

Start the speakerphone by attaching the internal speaker and mic to the line;

 

DCE off-hook.

OK

DCE responds: Speakerphone mode is active. The phone is off hook; dial tone is

 

audible, and the speaker and mic are ready to use.

The caller can hear ringback or busy signal from the phone being called. If the person at the other end picks up, the caller and callee converse.

The conversation ends, and the speakerphone user hangs up.

Command

Description

ATH

The application tells the modem to terminate the call with a standard

 

AT command.

OK

DCE responds: The speakerphone is now on-hook. The speaker and

 

microphone have been detached from the system, and the modem is now in

 

data mode (+FCLASS = 0).

Version 1.0

Lucent Technologies Inc.

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Lucent Technologies Host-Based Controller Modem AT specifications Example # 2 Initiating a stored number speakerphone call
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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.